ST25DV04KC ST25DV16KC ST25DV64KC

Datasheet

Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, fast transfer
mode capability and optimized I2C

Features
Includes ST state-of-the-art patented technology

I²C interface
SO8 TSSOP8
• Two-wire I²C serial interface supports 1MHz protocol
• Single supply voltage: 1.8 V to 5.5 V
• Multiple byte programming (up to 256 bytes)
• Configurable I²C slave address
WLCSP10
Contactless interface
• Based on ISO/IEC 15693
• NFC Forum Type 5 tag certified by the NFC Forum
• Supports all ISO/IEC 15693 modulations, coding, subcarrier modes and data
UFDFPN8 UFDFPN12 rates
• Custom fast read access up to 53 kbit/s
• Single and multiple blocks read (same for Extended commands)
• Single and multiple (up to four) blocks write (same for Extended commands)
• Internal tuning capacitance: 28.5 pF

Memory
• Up to 64 Kbit of EEPROM (depending on version)
• I²C interface accesses bytes
• RF interface accesses blocks of 4 bytes
• Write time:
– From I²C: typical 5 ms for 1 up to 16 bytes
Product status link
– From RF: typical 5 ms for one block
ST25DV04KC • Data retention: 40 years
ST25DV16KC • Write cycles endurance:
ST25DV64KC – 1 million at 25 °C
– 600k at 85 °C
– 500k at 105 °C
– 400k at 125 °C

Fast transfer mode

• Fast data transfer between I²C and RF interfaces
• Half-duplex 256 bytes dedicated buffer

Energy harvesting
• Analog output pin to power external components

Data protection
• User memory: one to four configurable areas, protectable in read and/or write
by three 64-bit passwords in RF and one 64‑bit password in I²C

DS13519 - Rev 6 - February 2023 www.st.com

For further information contact your local STMicroelectronics sales office.
 ST25DV04KC ST25DV16KC ST25DV64KC

• System configuration: protected in write by a 64-bit password in RF and a 64-bit password in I²C

GPO
• Interruption pin configurable on multiple RF events (field change, memory write, activity, fast transfer, user
set/reset/pulse), and I²C events (memory write completed, RF switch off)
• Open drain or CMOS output (depending on version)

Low power mode (10-ball and 12-pin package only)

• Input pin to trigger low power mode

RF management
• RF command interpreter enabled/disabled from I²C host controller
• I²C priority: immediate RF switch off from I²C

Temperature range
• Range 6:
– From -40 °C to 85 °C
• Range 8:
– From -40 °C to 105 °C (UDFPN8 and UFDFPN12 only)
– From -40 °C to 125 °C (SO8N and TSSOP8 only, 105 °C max on RF interface)

Package
• 8-pin, 10-ball, and 12-pin packages
• ECOPACK2 (RoHS compliant)

DS13519 - Rev 6 page 2/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Description

1 Description

The ST25DV04KC, ST25DV16KC and ST25DV64KC devices (hereinafter referred collectively to as

ST25DVxxKC) are NFC RFID tags offering respectively 4, 16, and 64‑Kbit of electrically erasable programmable
memory (EEPROM). These devices feature two interfaces: the first one is an I²C serial link that can be operated
from a DC power supply, the second one is an RF link activated when the device acts as a contactless memory
powered by the received carrier electromagnetic wave.
In I²C mode, the user memory contains up to 512, 2048, or 8192 bytes, which can be split in four flexible and
protectable areas.
In RF mode, following ISO/IEC 15693 or NFC Forum Type 5 recommendations, the user memory contains up to
128, 512, or 2048 blocks of 4 bytes, which can be split in four flexible and protectable areas.
The ST25DVxxKC devices offer a fast transfer mode between the RF and contact worlds, thanks to a 256 bytes
volatile buffer (also called mailbox). In addition, the GPO pin provides data about incoming events, like the RF
field detection, RF activity in progress, or mailbox message availability. An energy harvesting feature is also
available, when external conditions make it possible.

1.1 ST25DVxxKC block diagram

Figure 1. ST25DVxxKC block diagram

1.8V VOLTAGE DIGITAL UNIT CONTROL

LPD1 VDCG1
REGULATOR
ENERGY
FAST TRANSFER
HARVESTING
CONTROL GPO
ANALOG FRONT END CONTROL
256 Bytes
V_EH ENERGY BUFFER
HARVESTING MEMORY
CONTROL Vcc
ISO/IEC 15693
AC0 PROTOCOL
RF INTERFACE
AND CONTROL
28.5pF tuning Dynamic Vss
capacitance I2C CONTROL
AC1 registers

EEPROM SDA

I2C
System INTERFACE
Up to 64Kbits User memory SCL
registers

1. VDCG and LPD are included in the 10-ball and 12-pin package only.

DS13519 - Rev 6 page 3/202

 ST25DV04KC ST25DV16KC ST25DV64KC
ST25DVxxKC packaging

1.2 ST25DVxxKC packaging

ST25DVxxKC is provided in 8-pin, 10-ball, and 12-pin packages:
• SO8N, TSSOP8, or UDFPN8 8-pin packages for the open drain version of interrupt output
• 10 balls (WLCSP) and 12 pins (UFDFPN12) for the CMOS version of interrupt output. These packages
include an additional LPD pin to minimize the standby consumption

Table 1. 8-pin packages signal names

Signal name Function Direction

V_EH Energy harvesting Power output

GPO Interrupt output Output
SDA Serial data I/O
SCL Serial clock Input
AC0, AC1 Antenna coils -
VCC Supply voltage Power

VSS Ground -

EP (1) Exposed pad Must be left floating

1. Available only on UFDPN8 packages.

Figure 2. ST25DVxxKC 8-pin SO8N package connections

V_EH 1 8 VCC

AC0 2 7 GPO (Open drain)

AC1 3 6 SCL

VSS 4 5 SDA

SO8N

Figure 3. ST25DVxxKC 8-pin TSSOP8 package connections

V_EH 1 8 VCC

AC0 2 7 GPO (Open drain)

AC1 3 6 SCL

VSS 4 5 SDA

TSSOP8

DS13519 - Rev 6 page 4/202

 ST25DV04KC ST25DV16KC ST25DV64KC
ST25DVxxKC packaging

Figure 4. ST25DVxxKC 8-pin UFDFN8 package connections

V_EH 1 8 VCC

AC0 2 7 GPO (Open drain)

EP
AC1 3 6 SCL

VSS 4 5 SDA

UFDFN8

Table 2. 10-pin packages signal names

Signal name Function Direction

V_EH Energy harvesting Power output

GPO Interrupt output Output
SDA Serial data I/O
SCL Serial clock Input
AC0, AC1 Antenna coils -
VCC Supply voltage Power

VSS Ground -

LPD Low power down mode Input

VDCG Supply voltage for GPO driver Power

Figure 5. 10-ball WLCSP package connections

1 2 3 4 4 3 2 1

A VCC V_EH V_EH VCC A

B GPO AC0 AC0 GPO B

C VDCG LPD LPD VDCG C

D SCL AC1 AC1 SCL D

E SDA VSS VSS SDA E

Marking side Bump side

(top view) (bottom view)

DS13519 - Rev 6 page 5/202

 ST25DV04KC ST25DV16KC ST25DV64KC
ST25DVxxKC packaging

Table 3. 12-pin packages signal names

Signal name Function Direction

V_EH Energy harvesting Power output

GPO Interrupt output Output
SDA Serial data I/O
SCL Serial clock Input
AC0, AC1 Antenna coils -
VCC Supply voltage Power

VSS Ground -

LPD Low power down mode Input

VDCG Supply voltage for GPO driver Power

NC Not connected Must be left floating

EP Exposed pad Must be left floating

Figure 6. ST25DVxxKC 12-pin UFDFPN12 package connections

LPD 1 12 VCC

NC 2 11 GPO (CMOS)

V_EH 3 10 VDCG
EP
AC0 4 9 NC

AC1 5 8 SCL

VSS 6 7 SDA

UFDFPN12

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 ST25DV04KC ST25DV16KC ST25DV64KC
Signal descriptions

2 Signal descriptions

2.1 Serial link (SCL, SDA)

2.1.1 Serial clock (SCL)

This input signal is used to strobe all data in and out of the ST25DVxxKC. In applications where this signal is used
by slave devices to synchronize the bus to a slower clock, the bus master must have an open drain output, and a
pull-up resistor must be connected from serial clock (SCL) to VCC. See Section 9.2 I²C parameters to know how
to calculate the value of this pull-up resistor.

2.1.2 Serial data (SDA)

This bidirectional signal is used to transfer data in or out of the ST25DVxxKC. It is an open drain output that may
be wire OR-ed with other open drain or open collector signals on the bus. A pull-up resistor must be connected
from serial data (SDA) to VCC. (Figure 82 indicates how to calculate the value of the pull-up resistor).

2.2 Power control (VCC, LPD, VSS)

2.2.1 Supply voltage (VCC)

This pin can be connected to an external DC supply voltage.
Note: An internal voltage regulator allows the external voltage applied on VCC to supply the ST25DVxxKC, while
preventing the internal power supply (rectified RF waveforms) to output a DC voltage on the VCC pin.

2.2.2 Low power down (LPD)

This input signal is used to control an internal 1.8 V regulator delivering the internal supply. When LPD is high, the
regulator is shut off, and its consumption is reduced below 1μA. The regulator has a turn on time in the 100 μs
range, to be added to the boot duration, before the device becomes fully operational. The impedance on the LDP
pin, when set high, must not exceed 5 kΩ. The LPD pin is internally pulled-down.
This feature is available only on the 10-ball and 12-pin packages.

2.2.3 Ground (VSS)

VSS is the reference for the VCC and VDCG supply voltages and V_EH analogic output voltage.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF link (AC0 AC1)

2.3 RF link (AC0 AC1)

2.3.1 Antenna coil (AC0, AC1)

These inputs are used to connect the ST25DVxxKC device to an external coil exclusively. It is advised not to
connect any other DC or AC path to AC0 or AC1.
When correctly tuned, the coil is used to power and access the device using the ISO/IEC 15693 and ISO 18000-3
mode 1 protocols.

2.4 Process control (GPO, VDCG)

2.4.1 Driver supply voltage (VDCG)

This pin, available only with 10-ball and 12-pin ST25DVxxKC packages, can be connected to an external DC
supply voltage. It only supplies the GPO (CMOS) driver block.
ST25DVxxKC cannot be powered by VDCG. If VDCG is left floating, there is not any information available on the
GPO (CMOS) pin.

2.4.2 General purpose output (GPO)

The ST25DVxxKC features a configurable output GPO pin used to provide RF and I²C activity information to an
external device.
Depending on the ST25DVxxKC package version, there are two types of GPO output:
• 8-pin ST25DVxxKC packages offer an open drain GPO output. This GPO pin must be connected to an
external pull‑up resistor (> 4.7 kΩ) to operate.
• 10-ball and 12-pin ST25DVxxKC packages offer a CMOS GPO output, which requires to connect VDCG
pin to an external power supply. The interrupt consists of setting the state to a high level, or outputting a
positive pulse on the GPO pin.
GPO pin is a configurable output signal, and can mix several interruption modes. By default, the GPO register
sets the interruption mode as an RF field change detector. It is able to raise various events like RF activity,
Memory write completion, or fast transfer actions. It can authorize the RF side to directly drive the GPO pin
using the Manage GPO command, to set the output state, or emit a single pulse (for example, to wake up an
application.). See Section 5.4 GPO for details.

2.5 Energy harvesting analog output (V_EH)

This analog output pin is used to deliver the analog voltage V_EH available when the Energy harvesting mode
is enabled and if the RF field strength is sufficient. When the Energy harvesting mode is disabled or the RF field
strength is not sufficient, V_EH pin is in High-Z state (See Section 5.5 Energy harvesting (EH) for details).
Energy harvesting voltage output is not regulated.

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 ST25DV04KC ST25DV16KC ST25DV64KC
Power management

3 Power management

3.1 Wired interface

Operating supply voltage VCC

In contact mode, prior to selecting the memory and issuing instructions to it, a valid and stable VCC voltage within
the specified [VCC(min), VCC(max)] range must be applied (see Table 246. I²C operating conditions). To maintain
a stable DC supply voltage, it is recommended to decouple the VCC line with a suitable capacitor (usually of the
order of 10 nF and 100 nF) close to the VCC/VSS package pins.
This voltage must remain stable and valid until the end of the transmission of the instruction and, for a Write
instruction, until the completion of the internal I²C write cycle (tW). Instructions are not taken into account until
completion of ST25DVxxKC's boot sequence (see the figure below).

Figure 7. ST25DVxxKC power-up sequence (No RF field, LPD pin tied to VSS or package without LPD pin)

I2C interface ready

VCC Pin

Internal supply
Power-up by VCC
(No VCC) None
Access
allowed
RF or I2C I2C Start I2C Stop

RF access not allowed

* When RF field is present before VCC set up, boot is already done and tboot is null.

tboot*
* If the LPD pin follows VCC before going low, tboot is equal to tboot_LPD and starts only

DT72310V1
when LPD reaches the low level.
MS68573

Power-up conditions
When the power supply is turned on, VCC rises from VSS to VCC. The VCC rise time must not vary faster than
1 V/µs.

Device reset in I²C mode

In order to prevent inadvertent write operations during power-up, a power-on reset (POR) circuit is included.
At power-up (continuous rise of VCC), the ST25DVxxKC does not respond to any I2C instruction until VCC
has reached the power-on reset threshold voltage (this threshold is lower than the minimum VCC operating
voltage defined in Table 246. I²C operating conditions). When VCC passes over the POR threshold, the device
is reset and enters the Standby power mode. However, the device must not be accessed until VCC has reached
a valid and stable VCC voltage within the specified [VCC(min), VCC(max)] range and tbootDC time necessary to
ST25DVxxKC set-up has passed.
In the version supporting LPD pin, the boot takes place only when LPD goes low.
In a similar way, during power-down (continuous decrease in VCC), as soon as VCC drops below the power-on
reset threshold voltage, the device stops responding to any instruction sent to it, and I²C address counter is reset.

Power-down mode
During power-down (continuous decay of VCC), the device must be in Standby power mode (mode reached after
decoding a Stop condition, assuming that there is no internal write cycle in progress).

DS13519 - Rev 6 page 9/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Contactless interface

3.2 Contactless interface

Device set in RF mode
To ensure a proper boot of the RF circuitry, the RF field must be turned ON without any modulation for
a minimum period of time tbootRF. Before this time, ST25DVxxKC ignores all received RF commands. (See
Figure 8. ST25DVxxKC RF power-up sequence (No DC supply)).

Device reset in RF mode

To ensure a proper reset of the RF circuitry, the RF field must be turned off (100% modulation) for a minimum
tRF_OFF period of time.
The RF access can be temporarily or indefinitely disabled by setting the appropriate value in the RF_MNGT or
RF_MNGT_Dyn registers.

Figure 8. ST25DVxxKC RF power-up sequence (No DC supply)

RF interface ready
RFfield None access
allowed RF REQUEST RF ANSWER
RF or I2C

Power-up by RF tbootRF
(No VCC;
Pull-up on GPO) Vint_supply
tMINCD
GPO = RF_ACTIVITY REQ ANS
GPO open drain EOF EOF
version
IT duration
GPO = FIELD CHANGE

GPO = FIELD CHANGE AND RF_ACTIVITY

DT72312V1
No answer to RF
request if any

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Memory management

4 Memory management

4.1 Memory organization overview

The ST25DVxxKC memory is divided in four main memory areas:
• User memory
• Dynamic registers
• Fast transfer mode buffer
• System configuration area
The ST25DVxxKC user memory can be divided into 4 flexible user areas. Each area can be individually read -
and/or - write-protected with one out of three specific 64-bit password.
The ST25DVxxKC dynamic registers are accessible by RF or I2C host and provide dynamic activity status or
allow temporary activation or deactivation of some ST25DVxxKC features.
The ST25DVxxKC also provides a 256-byte fast transfer mode buffer, acting as a mailbox between RF and I2C
interface, allowing fast data transfer between contact and contactless worlds.
Finally, the ST25DVxxKC system configuration area contains static registers to configure all ST25DVxxKC
features, which can be tuned by the user. Its access is protected by a 64-bit configuration password.
This system configuration area also includes read only device information such as IC reference, memory size or
IC revision, as well as a 64-bit block that is used to store the 64-bit unique identifier (UID), and the AFI (default
00h) and DSFID (default 00h) registers. The UID is compliant with the ISO 15693 description, and its value is
used during the anticollision sequence (Inventory). The UID value is written by ST on the production line. The AFI
register stores the application family identifier. The DSFID register stores the data storage family identifier used in
the anticollision algorithm.
The system configuration area includes five additional 64-bit blocks that store an I2C password plus three RF user
area access passwords and an RF configuration password.

DS13519 - Rev 6 page 11/202

 ST25DV04KC ST25DV16KC ST25DV64KC
User memory

Figure 9. Memory organization

CC File

Area 1

Always readable
User memory
(EEPROM up to 64-Kbits) Area 2
Password protected
Area 3

Area 4

Dynamic configuration Dynamic registers

and activity status

Fast Transfer Mode

Fast Transfer Mode mailbox
256 Bytes buffer

Static configuration registers

System configuration
Device information
(EEPROM)
UID, AFI, DSFID
Password protected
Passwords

4.2 User memory

User memory is accessible from both RF contactless interface and I2C wired interface.
From RF interface, user memory is addressed as Blocks of 4 bytes, starting at address 0. RF extended read and
write commands can be used to address all ST25DVxxKC memory blocks. Other read and write commands can
only address up to block FFh.
From I2C interface, user memory is addressed as Bytes, starting at address 0. Device select must set E2 = 0.
User memory can be read in continuity. Unlike the RF interface, there is no roll-over when the requested address
reaches the end of the memory capacity.
Table 4. User memory as seen by RF and by I2C shows how memory is seen from RF interface and from I2C
interface.

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 ST25DV04KC ST25DV16KC ST25DV64KC
User memory

Table 4. User memory as seen by RF and by I2C

RF command I2C command

User memory
(block addressing) (byte addressing)

RF block (00)00h

I2C byte I2C byte I2C byte I2C byte

0003h 0002h 0001h 0000h
Read Single Block RF block (00)01h
Read Multiple Blocks I2C byte I2C byte I2C byte I2C byte
Fast Read Single Block 0007h 0006h 0005h 0004h
Fast Read Multiple Blocks RF block (00)02h
Write Single Block
I2C byte I2C byte I2C byte I2C byte
Write Multiple Blocks
000Bh 000Ah 0009h 0008h
Ext Read Single Block
....
Ext Read Multiple Blocks
RF block (00)7Fh (1)
Fast Ext Read Single Block
Fast Ext Read Multi. Blocks I2C byte I2C byte I2C byte I2C byte

Ext Write Single Block 01FFh 01FEh 01FDh 01FCh

I2C Read command
Ext Write Multiple Blocks ....
I2C Write command
RF block (00)FFh (2)
Device select E2 = 0
I2C byte I2C byte I2C byte I2C byte
03FFh 03FEh 03FDh 03FCh
RF block 0100h

I2C byte I2C byte I2C byte I2C byte

0403h 0402h 0401h 0400h
Ext Read Single Block ....
Ext Read Multiple Blocks
RF block 01FFh (3)
Fast Ext Read Single Block
I2C byte I2C byte I2C byte I2C byte
Fast Ext Read Multi. Blocks
07FFh 07FEh 07FDh 07FCh
Ext Write Single Block
....
Ext Write Multiple Blocks
RF block 07FFh (4)

I2C byte I2C byte I2C byte I2C byte

1FFFh 1FFEh 1FFDh 1FFCh

1. Last block of user memory in ST25DV04KC.

2. Last block accessible with Read Single Block, Read Multiple Blocks, Fast Read Single Block, Fast Read Multiple Blocks, Write Single Block
and Write Multiple Blocks RF commands.
3. Last block of user memory in ST25DV16KC.
4. Last block of user memory in ST25DV64KC.

Note: In the factory all blocks of user memory are initialized to 00h.

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 ST25DV04KC ST25DV16KC ST25DV64KC
User memory

4.2.1 User memory areas

The user memory can be split into different areas, each one with a distinct access privilege.
RF and I2C write commands are legal only within a same area:
• In RF, Write Multiple Blocks and Extended Write Multiple Blocks command are not executed and return the
error 0Fh if addresses cross an area border.
• In I2C, a sequential write is not executed and all bytes with addresses crossing the area border are not
acknowledged if addresses cross an area border.
RF and I2C read commands are allowed over multiple areas:
• In RF, Read Multiple Blocks and Extended read multiple Blocks (and related Fast commands) are executed
and return all readable blocks until reaching a non readable block (address read protected or non
available), even if addresses cross area borders.
• In I2C, sequential read returns all readable bytes until reaching a non readable byte (address read
protected or non available) even if addresses cross area borders. Non readable bytes return value FFh.
Each user memory area is defined by its ending address ENDAi. The starting address is implicitly defined by the
end of the preceding area.
There are three ENDAi registers in the configuration system memory, used to define the end addresses of Area 1,
Area 2 and Area 3. The end of Area 4 is always the last block/byte of memory and is not configurable.

Figure 10. ST25DVxxKC user memory areas

ST25DV user memory

Areas limit Block/Byte 0000h

registers Area1
(8 Blocks/32 Bytes minimum)
ENDA1
Area2
ENDA2
Area3
ENDA3
Area4
Last Block/Byte
of user memory

On factory delivery all ENDAi are set to maximum value, only Area1 exists and includes the full user memory.
A granularity of 8 blocks (32 bytes) is offered to code area ending points.
An area’s end limit is coded as followed in ENDAi registers:
• Last RF block address of area = 8 x ENDAi + 7 => ENDAi = int(Last Areai RF block address / 8)
• Last I2C byte address of area = 32 * ENDAi + 31 => ENDAi = int(Last Areai I2C byte address / 32)
• As a consequence, ENDA1 = 0 minimum size of Area 1 is 8 blocks (32 bytes).

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 ST25DV04KC ST25DV16KC ST25DV64KC
User memory

Table 5. Maximum user memory block and byte addresses and ENDAi value

Last user memory block address Last user memory byte address seen
Device Maximum ENDAi value
seen by RF by I2C

ST25DV04KC 007Fh 01FFh 0Fh

ST25DV16KC 01FFh 07FFh 3Fh
ST25DV64KC 07FFh 1FFFh FFh

Table 6. Areas and limit calculation from ENDAi registers

Area Seen from RF interface Seen from I2C interface

Block 0000h Byte 0000h

Area 1 … …
Block (ENDA1*8)+7 Byte (ENDA1*32)+31
Block (ENDA1+1)*8 Byte (ENDA1+1)*32
Area 2 … …
Block (ENDA2*8)+7 Byte (ENDA2*32)+31
Block (ENDA2+1)*8 Byte (ENDA2+1)*32
Area 3 … …
Block (ENDA3*8)+7 Byte (ENDA3*32)+31
Block (ENDA3+1)*8 Byte (ENDA3+1)*32
Area 4 … …
Last memory Block Last memory Byte

Organization of user memory in areas have the following characteristics:

• At least one area exists (Area1), starting at Block/Byte address 0000h and finishing at ENDA1, with ENDA1
= ENDA2 = ENDA3 = End of user memory (factory setting).
• Two Areas could be defined by setting ENDA1 < ENDA2 = ENDA3 = End of user memory.
• Three Areas may be defined by setting ENDA1 < ENDA2 < ENDA3 = End of user memory.
• A maximum of four areas may be defined by setting ENDA1 < ENDA2 < ENDA3 < End of user memory.
• Area 1 specificities
– Start of Area1 is always Block/Byte address 0000h.
– Area1 minimum size is 8 blocks (32 bytes) when ENDA1 = 00h.
– Area1 is always readable.
• The last area always finishes on the last user memory Block/Byte address (ENDA4 doesn't exist).
• All areas are contiguous: end of Area(n) + one Block/Byte address is always start of Area(n+1).

Area size programming

RF user must first open the RF configuration security session to write ENDAi registers.
I2C host must first open I2C security session to write ENDAi registers.
When programming an ENDAi register, the following rule must be respected:
• ENDAi-1 < ENDAi ≤ ENDAi+1 = End of memory.
This means that prior to programming any ENDAi register, its successor (ENDAi+1) must first be programmed to
the last Block/Byte of memory:
• Successful ENDA3 programming condition: ENDA2 < ENDA3 ≤ End of user memory
• Successful ENDA2 programming condition: ENDA1 < ENDA2 ≤ ENDA3 = End of user memory
• Successful ENDA1 programming condition: ENDA1 ≤ ENDA2 = ENDA 3 = End of user memory
If this rule is not respected, an error 0Fh is returned in RF, NoAck is returned in I2C, and programming is not
done.

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User memory

In order to respect this rule, the following procedure is recommended when programming Areas size (even for
changing only one Area size):
1. Ends of Areas 3 and 2 must first be set to the end of memory while respecting the following order:
a. If ENDA3 ≠ end of user memory, then set ENDA3 = end of memory; else, do not write ENDA3.
b. If ENDA2 ≠ end of user memory, then set ENDA2 = end of memory; else, do not write ENDA2.
2. Then, desired area limits can be set respecting the following order:
a. Set new ENDA1 value.
b. Set new ENDA2 value, with ENDA2 > ENDA1
c. Set new ENDA3 value, with ENDA3 > ENDA2
Example of successive user memory area setting (for a ST25DV64KC):
1. Initial state, 2 Areas are defined:
a. ENDA1 = 10h (Last block of Area 1: (10h x 8) + 7 = 0087h)
b. ENDA2 = FFh (Last block of Area 2: (FFh x 8) + 7 = 07FFh)
c. ENDA3 = FFh (No Area 3)
◦ Area 1 from Block 0000h to 0087h (136 Blocks)
◦ Area 2 from Block 0088h to 07FFh (1912 Blocks)
◦ There is no Area 3
◦ There is no Area 4
2. Split of user memory in four areas:
a. ENDA3 is not updated as it is already set to end of memory
b. ENDA2 is not updated as it is already set to end of memory
c. Set ENDA1 = 3Fh (Last block of Area 1: (3Fh x 8) + 7 = 01FFh)
d. Set ENDA2 = 5Fh (Last block of Area 1: (5Fh x 8) + 7 = 02FFh)
e. Set ENDA3 = BFh (Last block of Area 1: (BFh x 8) + 7 = 05FFh)
◦ Area1 from Block 0000h to 01FFh (512 Blocks)
◦ Area2 from Block 0200h to 02FFh (256 Blocks)
◦ Area3 from Block 0300h to 05FFh (768 Blocks)
◦ Area4 from Block 0600h to 07FFh (512 Blocks).
3. Return to a split in two equal areas:
a. Set ENDA3 = FFh
b. Set ENDA2 = FFh
c. Set ENDA1 = 7Fh (Last block of Area 1: (7Fh x 8) + 7 = 03FFh)
◦ Area1 from Block 0000h to 03FFh (1024 Blocks)
◦ Area2 from Block 0400h to 07FFh (1024 Blocks)
◦ There is no Area3
◦ There is no Area 4
Programming ENDA3 to FFh in step 2.a would have resulted in into an error, since rule ENDAi-1 < ENDAi would
not been respected (ENDA2 = ENDA3 in that case).

Registers for user memory area configuration

Table 7. ENDA1 access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h)

@05h R always, W if RF configuration security E2=1, E1=1, R always, W if I2C security
Write Configuration (cmd code A1h) session is open and configuration not locked 0005h session is open
@05h

DS13519 - Rev 6 page 16/202

 ST25DV04KC ST25DV16KC ST25DV64KC
User memory

Table 8. ENDA1

Bit Name Function Factory Value

ST25DV04KC: 0Fh
End Area 1 = 8*ENDA1+7 when expressed in blocks (RF)
b7-b0 ENDA1 ST25DV16KC: 3Fh
End Area 1 = 32*ENDA1+31 when expressed in bytes (I2C)
ST25DV64KC: FFh

Note: Refer to Table 13. System configuration memory map for ENDA1 register.

Table 9. ENDA2 access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h)

@07h R always, W if RF configuration security E2=1, E1=1, R always, W if I2C security
Write Configuration (cmd code A1h) session is open and configuration not locked 0007h session is open
@07h

Table 10. ENDA2

Bit Name Function Factory Value

ST25DV04KC: 0Fh
End Area 2 = 8 x ENDA2 + 7 when expressed in blocks (RF)
b7-b0 ENDA2 ST25DV16KC: 3Fh
End Area 2 = 32*ENDA2 + 31 when expressed in bytes (I2C)
ST25DV64KC: FFh

Note: Refer to Table 13. System configuration memory map for ENDA2 register.

Table 11. ENDA3 access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h)

@09h R always, W if RF configuration security E2=1, E1=1, R always, W if I2C security
Write Configuration (cmd code A1h) session is open and configuration not locked 0009h session is open
@09h

Table 12. ENDA3

Bit Name Function Factory Value

ST25DV04KC: 0Fh
End Area 3 = 8 x ENDA3 + 7 when expressed in blocks (RF)
b7-b0 ENDA3 ST25DV16KC: 3Fh
End Area 3 = 32 x ENDA3 + 31 when expressed in bytes (I2C)
ST25DV64KC: FFh

Note: Refer to Table 13. System configuration memory map for ENDA3 register.

DS13519 - Rev 6 page 17/202

 ST25DV04KC ST25DV16KC ST25DV64KC
System configuration area

4.3 System configuration area

In addition to EEPROM user memory, ST25DVxxKC includes a set of static registers located in the system
configuration area memory (EEPROM nonvolatile registers). Those registers are set during device configuration
(that is: area extension), or by the application (that is: area protection). Static registers content is read during the
boot sequence and define basic ST25DVxxKC behaviour.
In RF, the static registers located in the system configuration area can be accessed via dedicated Read
Configuration and Write Configuration commands, with a pointer acting as the register address.
The RF configuration security session must first be open, by presenting a valid RF configuration password, to
grant write access to system configuration registers.
The system configuration area write access by RF can also be deactivated by I²C host.
In I²C static registers located in the system configuration area can be accessed with I²C read and write commands
with device select E2=1, E1=1. Readable system areas could be read in continuity.
I²C security session must first be open, by presenting a valid I²C password, to grant write access to system
configuration registers.
The following table shows the complete map of the system configuration area, as seen by RF and I²C interface.

Table 13. System configuration memory map

RF access Static Register I²C access

Address Type Name Function Device select Address Type

00h RW (1) GPO1 Enable/disable GPO output and GPO ITs for RF events E2=1, E1=1 0000h RW (2)
Enable/disable GPO ITs for I²C events and set Interruption
01h RW(1) GPO2 E2=1, E1=1 0001h RW(2)
pulse duration

02h RW(1) EH_MODE Energy Harvesting default strategy after Power ON E2=1, E1=1 0002h RW(2)

03h RW(1) RF_MNGT RF interface state after Power ON E2=1, E1=1 0003h RW(2)

04h RW(1) RFA1SS Area1 RF access protection E2=1, E1=1 0004h RW(2)

05h RW(1) ENDA1 Area 1 ending point E2=1, E1=1 0005h RW(2)

06h RW(1) RFA2SS Area2 RF access protection E2=1, E1=1 0006h RW(2)

07h RW(1) ENDA2 Area 2 ending point E2=1, E1=1 0007h RW(2)

08h RW(1) RFA3SS Area3 RF access protection E2=1, E1=1 0008h RW(2)

09h RW(1) ENDA3 Area 3 ending point E2=1, E1=1 0009h RW(2)

0Ah RW(1) RFA4SS Area4 RF access protection E2=1, E1=1 000Ah RW(2)

No access I2CSS Area 1 to 4 I2C access protection E2=1, E1=1 000Bh RW(2)

N/A RW (3) (4) LOCK_CCFILE Blocks 0 and 1 RF Write protection E2=1, E1=1 000Ch RW(2)

0Dh RW(1) FTM Fast transfer mode authorization and watchdog setting. E2=1, E1=1 000Dh RW(2)

I2C slave address configuration and enable/disable RF

No access I2C_CFG E2=1, E1=1 000Eh RW(2)
switch off from I2C.

0Fh RW(1) LOCK_CFG Protect RF Write to system configuration registers E2=1, E1=1 000Fh RW(2)

N/A WO (5) LOCK_DSFID DSFID lock status E2=1, E1=1 0010h RO

NA WO (6) LOCK_AFI AFI lock status E2=1, E1=1 0011h RO

N/A RW(5) DSFID DSFID value E2=1, E1=1 0012h RO

N/A RW(6) AFI AFI value E2=1, E1=1 0013h RO

RO MEM_SIZE Memory size value in blocks, 2 bytes E2=1, E1=1 0014h to 0015h RO
N/A
RO BLK_SIZE Block size value in bytes E2=1, E1=1 0016h RO
N/A RO IC_REF IC reference value E2=1, E1=1 0017h RO
NA RO UID Unique identifier, 8 bytes E2=1, E1=1 0018h to 001Fh RO

DS13519 - Rev 6 page 18/202

 ST25DV04KC ST25DV16KC ST25DV64KC
System configuration area

RF access Static Register I²C access

Address Type Name Function Device select Address Type

IC_REV IC revision E2=1, E1=1 0020h RO

- ST Reserved E2=1, E1=1 0021h RO

No access - ST Reserved E2=1, E1=1 0022h RO

- ST Reserved E2=1, E1=1 0023h RO

I2C_PWD I2C security session password, 8 bytes E2=1, E1=1 0900h to 0907h R/W (7) (8)

N/A WO (9) RF_PWD_0 RF configuration security session password, 8 bytes

N/A WO(9) RF_PWD_1 RF user security session password 1, 8 bytes

No access
N/A WO(9) RF_PWD_2 RF user security session password 2, 8 bytes

N/A WO(9) RF_PWD_3 RF user security session password 3, 8 bytes

1. Write access is granted if RF configuration security session is open and configuration is not locked (LOCK_CFG register equals to 0).
2. Write access if I²C security session is open.
3. Write access to bit 0 if Block 00h is not already locked and to bit 1 if Block 01h is not already locked.
4. LOCK_CCFILE content is only readable through reading the Block Security Status of blocks 00h and 001h (see Section 5.6.3 User memory
protection)
5. Write access if DSFID is not locked
6. Write access if AFI is not locked.
7. Write access with I2C Write Password command, only after presenting a correct I2C password.
8. Read access is granted if I2C security session is open.
9. Write access only if corresponding RF security session is open.

DS13519 - Rev 6 page 19/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Dynamic configuration

4.4 Dynamic configuration

ST25DVxxKC has a set of dynamic registers that allow temporary modification of its behavior or report on its
activity. Dynamic registers are volatile and not restored to their previous values after POR.
Some static registers have an image in dynamic registers: dynamic register value is initialized with the static
register value and may be updated by the application to modify the device behavior temporarily (i.e.: set reset
of Energy Harvesting). When a valid change occurs in a static register, in RF or I2C, the corresponding dynamic
register is automatically updated.
Other, dynamic registers, automatically updated, contain indication on ST25DVxxKC activity. (for instance:
IT_STS_Dyn gives the interruption’s status or MB_CTRL_Dyn gives the fast transfer mode mailbox control).
In RF, dynamic registers can be accessed via dedicated (Fast) Read Dynamic Configuration and (Fast) Write
Dynamic Configuration commands, with a pointer acting as the register address. No password is needed to
access dynamic registers.
In I2C, dynamic registers can be accessed with I2C read and write commands with device select E2=0, E1=1.
Dynamic registers can be read in continuity. Dynamic registers and fast transfer mode mailbox can be read in
continuity, but not written in continuity. No password is needed to access dynamic registers.
The table below shows the complete map of dynamic registers, as seen by RF interface and by I2C interface.

Table 14. Dynamic registers memory map

RF access Dynamic Registers I2C access

Device
Address Type Name Function Address Type
select

00h RO GPO_CTRL_Dyn GPO control E2=0, E1=1 2000h R/W

No access - ST Reserved E2=0, E1=1 2001h RO
02h R/W EH_CTRL_Dyn Energy Harvesting management & usage status E2=0, E1=1 2002h R/W
RF_MNGT_Dyn RF interface usage management E2=0, E1=1 2003h R/W

No access I2C_SSO_Dyn I2C security session status E2=0, E1=1 2004h RO

IT_STS_Dyn Interruptions Status E2=0, E1=1 2005h RO

0Dh R/W MB_CTRL_Dyn Fast transfer mode control and status E2=0, E1=1 2006h R/W
NA RO MB_LEN_Dyn Length of fast transfer mode message E2=0, E1=1 2007h RO

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 ST25DV04KC ST25DV16KC ST25DV64KC
Fast transfer mode mailbox

4.5 Fast transfer mode mailbox

ST25DVxxKC fast transfer mode uses a dedicated mailbox buffer for transferring messages between RF and I2C
worlds. This mailbox contains up to 256 Bytes of data which are filled from the first byte.
Fast transfer mode mailbox is accessed in bytes from both RF and I2C.
In RF, mailbox is read via a dedicated (Fast) Read Message command. Read can start from any address value
inside the mailbox, between 00h and FFh. Writing in the mailbox is done via the (Fast) Write Message command
in one shot, always starting at mailbox address 00h. No password is needed to access mailbox from RF, but fast
transfer mode must be enabled.
In I2C, mailbox read can start from any address value between 2008h and 2107h. Write mailbox MUST start from
address 2008h to a max of 2107h. No password is needed to access mailbox from I2C, but fast transfer mode
must be enabled.
The table below shows the map of fast transfer mode mailbox, as seen by RF interface and by I2C interface.

Table 15. Fast transfer mode mailbox memory map

RF access Fast transfer mode buffer I2C access

Device
Address Type Name Function Address Type
select

00h R/W MB_Dyn Byte 0 E2=0, E1=1 2008h R/W

01h R/W MB_Dyn Byte 1 E2=0, E1=1 2009h R/W
… … … Fast transfer mode buffer (256-Bytes) E2=0, E1=1 ... ...
FEh R/W MB_Dyn Byte 254 E2=0, E1=1 2106h R/W
FFh R/W MB_Dyn Byte 255 E2=0, E1=1 2107h R/W

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 ST25DV04KC ST25DV16KC ST25DV64KC
ST25DVxxKC specific features

5 ST25DVxxKC specific features

ST25DVxxKC offers the following features:

• A fast transfer mode (FTM), to achieve a fast link between RF and contact worlds, via a 256 byte buffer
called Mailbox. This mailbox dynamic buffer of 256 byte can be filled or emptied via either RF or I2C.
• A GPO pin, which indicates incoming events to the contact side, like RF events (RF field changes, Rf
activity, Rf writing completion or mailbox message availability) or I2C events (I2C write completion, RF
switch off from I2C).
• An Energy Harvesting element to deliver µW of power when external conditions make it possible.
• RF management, which allows ST25DVxxKC to ignore RF requests.
All these features can be programmed by setting static and/or dynamic registers of the ST25DVxxKC.
ST25DVxxKC can be partially customized using configuration registers located in the system area.
These registers are:
• dedicated to Data Memory organization and protection ENDAi, I2CSS, RFAiSS, LOCK_CCFILE.
• dedicated to fast transfer mode FTM
• dedicated to observation, GPO, IT_TIME
• dedicated to RF , RF_MNGT, EH_MODE
• dedicated the device’s structure LOCK_CFG
• dedicated to I2C configuration, I2C_CFG
A set of additional registers allows to identify and customize the product (DSFID, AFI, IC_REF, etc.).

In I2C
Read accesses to the static configuration register is always allowed, except for passwords. For dedicated
registers, write access is granted after prior successful presentation of the I2C password. Configuration register
are located from address 0000h to 00FFh in the system area.

In RF
Dedicated commands Read Configuration and Write Configuration must be used to access the static
configuration registers. Update is only possible when the access right was granted by presenting the RF
configuration password (RF_PWD_0), and if the system configuration was not previously locked by the I2C host
(LOCK_CFG=1), which acts as security master.
After any valid write access to the static configuration registers, the new configuration is immediately applied.
Some of the static registers have a dynamic image (notice _Dyn) preset with the static register value:
GPO_CTRL_Dyn, EH_CTRL_Dyn, RF_MNGT_Dyn and MB_CTRL_Dyn.
When it exists, ST25DVxxKC uses the dynamic configuration register to manage its processes. A dynamic
configuration register updated by the application recovers its default static value after a Power On Reset (POR).
Other dynamic registers are dedicated to process monitoring:
• I2C_SSO_Dyn is dedicated to data memory protection
• MB_LEN_Dyn, MB_CTRL_Dyn are dedicated to fast transfer mode
• IT_STS_Dyn is dedicated to interrupt
In I2C, read and write of the Dynamic registers is done using usual I2C read & write command at dedicated
address (E2=0 and E1=1 in device select).
In RF read or write accesses to the Dynamic registers are associated to the dedicated commands, Read Dynamic
Configuration, Write Dynamic Configuration and Read Message Length.

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 ST25DV04KC ST25DV16KC ST25DV64KC
Fast transfer mode (FTM)

5.1 Fast transfer mode (FTM)

5.1.1 Fast transfer mode registers

Static Registers

Table 16. FTM access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @0Dh R always, W if RF configuration security

E2=1, E1=1, R always, W if I2C security
session is open and configuration not
Write Configuration (cmd code A1h) @0Dh 000Dh session is open
locked

Table 17. FTM

Bit Name Function Factory value

0: Enabling fast transfer mode is forbidden.

b0 MB_MODE 0b
1: Enabling fast transfer mode is authorized.

Watchdog duration =2MB_WDG − 1 × 30ms ± 6

b3-b1 MB_WDG 000b
If MD_WDG = 0, then watchdog duration is infinite
b7-b4 RFU - 0000b

Note: Refer to Table 13. System configuration memory map for the FTM register.

Dynamic Registers

Table 18. MB_CTRL_Dyn access

RF I2C

Command Type Address Type

Read Dynamic Configuration (cmd code ADh) @0Dh

Fast Read Dynamic Configuration (cmd code CDh) @0Dh b0: R always, W always E2=0, E1=1, b0: R always, W always
Write Dynamic Configuration (cmd code AEh) @0Dh b7-b1: RO 2006h b7-b1: RO
Fast Write Dynamic Configuration (cmd code CEh) @0Dh

DS13519 - Rev 6 page 23/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Fast transfer mode (FTM)

Table 19. MB_CTRL_Dyn

Bit Name Function Factory value

0: Disable FTM, FTM mailbox is empty

b0 MB_EN (1) 0b
1: Enable FTM

0: No I2C message in FTM mailbox

b1 HOST_PUT_MSG 0b
1: I2C has Put a message in FTM mailbox
0: No RF message in FTM mailbox
b2 RF_PUT_MSG 0b
1: RF has Put message in FTM mailbox
b3 RFU - 0b

0: No message missed by I2C

b4 HOST_MISS_MSG 0b
1: I2C did not read RF message before watchdog time out
0: No message missed by RF
b5 RF_MISS_MSG 0b
1: RF did not read message before watchdog time out

0: No message or message not coming from I2C

b6 HOST_CURRENT_MSG 0b
1: Current Message in FTM mailbox comes from I2C
0: No message or message not coming from RF
b7 RF_CURRENT_MSG 0b
1: Current Message in FTM mailbox comes from RF

1. MB_EN bit is automatically reset to 0 if MB_MODE bit in FTM register is reset to 0.

Note: Refer to Table 14. Dynamic registers memory map for the MB_CTRL_Dyn register.

Table 20. MB_LEN_Dyn access

RF I2C

Command Type Address Type

Read Message Length (cmd code ABh)

RO E2=0, E1=1, 2007h RO
Fast Read Message Length (cmd code CBh)

Table 21. MB_LEN_Dyn

Bit Name Function Factory value

Size in byte, minus 1 byte, of message contained in FTM

b7-b0 MB_LEN 0h
mailbox (automatically set by ST25DVxxKC)

Note: Refer to Table 14. Dynamic registers memory map for the MB_LEN_Dyn register.

5.1.2 Fast transfer mode usage

ST25DVxxKC acts as mailbox between RF (reader, smartphone, ...) and an I2C host (microcontroller...). Each
interface can send a message containing up to 256 bytes of data to the other interface through that mailbox.
To send data from RF reader to I2C host, fast transfer mode must be enabled, the mailbox must be free, VCC
power must be present, and the RF user must first writes the message containing data in the mailbox.
I2C host is then informed (by interruption on GPO output or polling on MB_CTRL_Dyn register) that a message
from RF is present in the mailbox.
Once the complete message has been read by I2C, mailbox is considered free again and is available for receiving
a new message (data is not cleared).
The RF user is informed that the message has been read by the I2C host by polling on MB_CTRL_Dyn register.

DS13519 - Rev 6 page 24/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Fast transfer mode (FTM)

Figure 11. RF to I2C fast transfer mode operation

ST25DV

Dynamic registers
MB_LEN_Dyn
MB_CRTL_Dyn

1Mb/s 26.5kb/s
RF message

Fast Transfer Mode mailbox ISO/IEC

I2C host I2C (256 Bytes) 15693 reader

Static register
GPO/RF_PUT_MSG
FTM

To send data from the I2C host to the RF reader, fast transfer mode must be enabled, the mailbox must be free,
VCC power must be present, and the I2C host must first write the message containing data in the mailbox.
The RF user must poll on MB_CTRL_Dyn register to check for the presence of a message from I2C in the
mailbox.
Once the complete message has been read by RF user, mailbox is considered free again and is available for
receiving a new message (data is not cleared).
The I2C host is informed that message has been read by RF user through a GPO interruption or by polling on the
MB_CTRL_Dyn register.

Figure 12. I2C to RF fast transfer mode operation

ST25DV

Dynamic registers
MB_LEN_Dyn
MB_CRTL_Dyn

Fast Transfer Mode mailbox ISO/IEC

I2C host I2C (256 Bytes) 15693 reader

Host message
1Mb/s
Up to
Static register 53kb/s
GPO/RF_GET_MSG
FTM

VCC supply source is mandatory to activate this feature.

No precedence rule is applied: the first request is served first.

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 ST25DV04KC ST25DV16KC ST25DV64KC
Fast transfer mode (FTM)

Adding a message is only possible when fast transfer mode is enabled (MB_EN=1) and mailbox is free
(HOST_PUT_MSG and RF_PUT_MSG cleared, which is the case after POR or after complete reading of I2C
message by RF, and complete reading of RF message by I2C).
A watchdog limits the message availability in time: when a time-out occurs, the mailbox is considered free, and
the HOST_MISS_MSG or RF_MISS_MSG bits is set into MB_CTRL_Dyn register. The data contained in the
mailbox is not cleared after a read or after the watchdog has been triggered: message data is still available
for read and until fast transfer mode is disabled. HOST_CURRENT_MSG and RF_CURRENT_MSG bits are
indicating the source of the current data.
The message is stored in a buffer (256 Bytes), and the write operation is done immediately. .
Caution: The data written in user memory (EEPROM), either from I2C or from RF, transits via the 256-Byte buffer.
Consequently fast transfer mode must be deactivated (MB_EN=0) before starting any write operation in user
memory, otherwise the command is NotACK for I2C or get an answer 0Fh for RF and programming is not done.

I2C access to mailbox

The access by I2C can be done by dedicated address mapping to mailbox (2008h to 2107h) with device select
E2=0, E1=1.
I2C reading operation does not support rollover. Therefore data out is set to FFh when the counter reaches the
message end.
The RF_PUT_MSG is cleared after reaching the STOP consecutive to reading the last message byte, and the
mailbox is considered free (but the message is not cleared and it is still present in the mailbox) until a new
message is written or mail ox is deactivated.
A I2C reading operation never deletes the HOST_PUT_MSG, and the message remains available for RF.
An I2C read can start at any address inside the mailbox (between address 2008h and 2107h).
A I2C write operation must start from the first mailbox location, at address 2008h. After reaching the Mailbox
border at address 2107h all bytes are NACK and the command is not executed (no rollover).
At the end of a successful I2C message write, the message length is automatically set into MB_LEN_Dyn register,
and HOST_PUT_MSG bit is set into MB_CTRL_Dyn register, and the write access to the mailbox is not possible
until the mailbox has been released again. MB_LEN_Dyn contains the size of the message in byte, minus 1.

RF access to mailbox
The RF Control & Access to mailbox is possible using dedicated custom commands:
• Read Dynamic Configuration and Fast Read Dynamic Configuration to check availability of mailbox.
• Write Dynamic Configuration and Fast Write Dynamic configuration to enable or disable fast transfer mode.
• Read Message Length and Fast Read Message Length to get the length of the contained message,
• Read Message and Fast Read Message to download the content of the mailbox,
• Write Message and Fast Write Message to put a new message in mailbox. (New length is automatically
updated after completion of a successful Write Message or Fast Write Message command).
HOST_PUT_MSG is cleared following a valid reading of the last message byte, and mailbox is considered free
(but message is not cleared and is still present in the mailbox) until a new message is written or mailbox is
deactivated.
An RF read can start at any address of inside the message, but return an error 0Fh if trying to read after the last
byte of the message.
An RF reading operation never deletes the RF_PUT_MSG and the message remains available for I2C.
At the end of a successful RF message write, the message length is automatically set in MB_LEN_Dyn register,
and RF_PUT_MSG bit is set in MB_CTRL_Dyn register. and write access to the mailbox is not possible until
mailbox has been freed again.
The presence of a DC supply is mandatory to get RF access to the mailbox. VCC_ON can be checked reading
the dynamic register EH_CTRL_Dyn.
To get more details about sequences to prepare and initiate a Fast Transfer, to detect progress of a fast transfer
or to control and execute a fast transfer, please refer to AN4910. How to exchange data between wired (I2C) and
wireless world (RF ISO15693) using fast transfer mode supported by ST25DVxxKC).

DS13519 - Rev 6 page 26/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Fast transfer mode (FTM)

Figure 13. Fast transfer mode mailbox access management.

MB_EN=00h or MB_EN=00h or
VCC OFF FTM disabled VCC OFF
MB_CTRL_Dyn=00h
No access

MB_EN=00h or VCC ON and

I2C read msg VCC OFF MB_EN=01h RF read msg

I2C write msg FTM enabled

FTM enabled RF write msg FTM enabled
Mailbox empty
I2C Message RF Message
MB_CTRL_Dyn=01h
MB_CTRL_Dyn=43h MB_CTRL_Dyn=85h
R/W access
Read access Read access

RF Mailbox free
rea sg
df ullm
ull df
ms
g rea
FTM enabled I2C
Mailbox free
MB_CTRL_Dyn=41/81h
R/W access

RF read I2C read

MB_CTRL_Dyn MB_CTRL_Dyn

FTM enabled
Mailbox free
MB_CTRL_Dyn=61/91h
Watchdog trig Watchdog trig
R/W access

Note: Assuming MB_MODE=1b

Assuming no error occurred

DS13519 - Rev 6 page 27/202

 ST25DV04KC ST25DV16KC ST25DV64KC
RF management feature

5.2 RF management feature

5.2.1 RF management registers

Table 22. RF_MNGT access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @03h R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 0003h
Write Configuration (cmd code A1h) @03h session is open
locked

Table 23. RF_MNGT

Bit Name Function Factory value

0: RF commands executed
b0 RF_DISABLE 0b
1: RF commands not executed (error 0Fh returned)
0: RF communication enabled
b1 RF_SLEEP 0b
1: RF communication disabled (ST25DV remains silent)
b7-b2 RFU - 000000b

Note: Refer to Table 13. System configuration memory map for the RF_MNGT register.

Table 24. RF_MNGT_Dyn access

RF I2C

Command Type Address Type

No access E2=0, E1=1, 2003h R always, W always

Table 25. RF_MNGT_Dyn

Bit Name Function Factory value

0: RF mode is defined by RF_OFF and RF_SLEEP bits

b0 RF_DISABLE 0b
1: RF commands not executed (error 0Fh returned)
0: RF mode is defined by RF_OFF and RF_DISABLE bits
b1 RF_SLEEP 0b
1: RF communication disabled (ST25DVxxKC remains silent)
0: RF mode is defined by RF_SLEEP and RF_DISABLE bits

b2 RF_OFF 1: RF is reset, and communication disabled (RF security 0b

sessions and ISO15693 state are reset and ST25DVxxKC
remains silent)
b7-b3 RFU - 0000000b

Note: Refer to Table 14. Dynamic registers memory map for the RF_MNGT_Dyn register.
The RF_OFF bit access is defined as followed:
• read only with user memory I2C slave address, followed by memory address of RF_MNGT_Dyn register.
• write to 1 only with I2C "RFSwitchOff" command.
• write to 0 only with I2C "RFSwitchOn" command.
• cannot be accessed by any other I2C slave address or by RF.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF management feature

The RF_DISABLE and RF_SLEEP bits are accessible in Read and Write with the user memory I2C salve
address, followed by memory address of RF_MNGT_Dyn register.

5.2.2 RF management feature description

RF communication capabilities between ST25DVxxKC and an RF reader can be controlled by configuring the RF
mode. ST25DVxxKC offers four RF modes:
• RF normal mode (default mode)
• RF disable mode
• RF sleep mode
• RF off mode
The RF_MNGT and RF_MNGT_Dyn registers are used to configure and control the RF mode.
At boot time, and each time the RF_MNGT register is updated, content of RF_MNGT_Dyn register is copied from
RF_MNGT register.
The content of the dynamic register RF_MNGT_Dyn can be updated on the fly, to temporarily modify the
behaviour of ST25DVxxKC without affecting the static value of RF_MNGT register which is recovered at next
POR.

RF normal mode:

In normal usage, and if I2C interface is not busy (see Section 5.3 Interface arbitration) , the ST25DVxxKC
processes the RF request and respond accordingly. In this mode, all bits of RF_MNGT_Dyn are set to 0.

RF disable mode:
In disable mode, RF commands are interpreted but not executed. In case of a valid command, the ST25DVxxKC
responds after t1 with the error 0Fh, and stay mute to the Inventory command.
ISO15693 state and RF security sessions status are unchanged.
In this mode, bit 0 of RF_MNGT_Dyn, RF_DISABLE, is set to 1 and all other bits are set to 0

RF sleep mode:
In sleep mode, all RF communication are disabled and RF interface doesn't interpret any RF commands.
ISO15693 state and RF security sessions status are unchanged.
In this mode, bit 1 of RF_MNGT_Dyn, RF_SLEEP, is set to 1 and bit 2, RF_OFF, is set to 0 (bit 0, RF_DISABLE is
don't care).

RF off mode:
In off mode, all RF communication are disabled and RF interface doesn't interpret any RF commands.
ISO15693 state is reset and RF security sessions are closed.
In this mode, bit 2 of RF_MNGT_Dyn, RF_OFF, is set to 1 and other bits are don't care.

RF sleep and RF disable modes are controlled through writing in RF_SLEEP and RF_DISABLE bits in RF_MNGT
register from RF or I2C and RF_MNGT_Dyn register from I2C.
RF off mode is controlled exclusively from I2C. An I2C “RFSwitchOff” command allows to switch off the RF and
an I2C “RFSwitchOn” command allows to switch on the RF. Entering RF off mode set the RF_MNGT_Dyn bit 2,
RF_OFF, to 1 (see Section 5.3 Interface arbitration for details on the I2C “RFSwitchOff” and I2C “RFSwitchOn”
commands).
Different RF modes have priority levels: RF off mode has priority over RF sleep mode, which has priority over RF
disable mode.
Effect of updating RF_MNGT or RF_MNGT_Dyn registers is immediate.
Effect of I2C “RFSwtichOff” command can be immediate or be effective at the end of a write in progress in
EEPROM memory, to avoid any data corruption. A pulse can be generated on GPO pin to indicate to the I2C host
exactly when the ST25DVxxKC enters in RF off mode following a valid I2C “RFSwitchOff” command.
RF off mode can be exited with the I2C “RFSwitchOn” command, or by removing the VCC power supply. Exiting
RF off mode reset the bit 2, RF_OFF, of RF_MNGT_Dyn register. When exiting RF off mode, ST25DVxxKC state
machine is set to Reset to Ready state, and all RF security sessions are closed.

DS13519 - Rev 6 page 29/202

 ST25DV04KC ST25DV16KC ST25DV64KC
RF management feature

Table 26. RF modes summary

RF mode RF requests treatment ISO15693 state RF security sessions

Run Executed normally Changed by relevant RF requests Changed by relevant RF requests

Not executed.
Disable Unchanged Unchanged
Error 0Fh returned when possible
Sleep Not processed, not answered Unchanged Unchanged
Off Not processed, not answered Reset (back to reset to ready state) Reset (all sessions closed)

Following table is summarizing the effect of RF_OFF, RF_SLEEP and RF_DISABLE bits, as well as I2C busy
state on any RF request:

Table 27. RF modes configuration bits and effect on RF requests

RF_OFF RF_SLEEP RF_DISABLE I2C busy Effect on RF request

0 0 0 0 Processed
0 0 0 1 Not processed and answered with error 0Fh when possible
0 0 1 x Not processed and answered with error 0Fh when possible
0 1 x x No processed, not answered
1 0 x x No processed, not answered
1 1 x x No processed, not answered

DS13519 - Rev 6 page 30/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Interface arbitration

5.3 Interface arbitration

ST25DVxxKC automatically arbitrates the exclusive usage of RF and I2C interfaces. Arbitration scheme obeys to
“first talk first served” basic law. (see Figure 14. ST25DVxxKC, Arbitration between RF and I2C).

Figure 14. ST25DVxxKC, Arbitration between RF and I2C

Power OFF

VCC ON
or
RF field ON

Boot
RF mute
I2C mute

Boot done

RF request SOF I2C start

I2C busy
RF busy ST25DV standby
(0Fh or no
(I2C commamds RF free
response to RF
are NoAck) I2C free
requests)

RF transaction terminated I2C transition terminated

RF transaction is terminated:
• at response EOF if answer.
• at request EOF is no answer.
• at RF field OFF.

I2C transaction is terminated:

• at the end of EEPROM programming time after the stop condition of a successful write into EEPROM (user
memory or system configuration). See Section 6.4 I²C Write operations for write time calculation
• at stop condition for any other I2C transaction
• at VCC power off
• at any I2C error (terminated before stop condition)
• at I2C timeout if it occurs
When RF is busy, I2C interface answers by NoAck on any I2C command.
When I2C is busy, RF commands receive no response (Inventory, Stay quiet, addressed commands) or error code
0Fh for any other command.

DS13519 - Rev 6 page 31/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Interface arbitration

5.3.1 I²C priority

When RF is in sleep mode or in off mode, RF commands are not interpreted, and RF cannot by busy. I²C is then
free to access the ST25DVxxKC exclusively.
Entering in RF sleep mode implies that I²C host writes into the RF_MNGT_Dyn register, which may not be
possible immediately if RF is busy.
In case I²C host needs to get exclusive and immediate access to the ST25DVxxKC, an immediate (or as soon as
possible) switch off (and on) of the RF interface is available.
A specific I²C “RFSwitchOff” command allows the I²C master to switch off RF immediately, or at the end of an RF
write in progress in EEPROM, even if an RF command is ongoing.
A specific I²C RFSwitchOn command allows the I²C master to switch on the RF immediately (RF returns to RF
mode defined by RF_MNGT_Dyn register).
Bit 5 of the I2C_CFG static register (I2C_RF_SWITCHOFF_EN) allows to enable or disable the RF switch off and
switch on from I²C.
The I²C “RFSwitchOff” command is defined as follows:
• START condition, followed by the I²C “RFSwitchOff” salve address (1 Byte), followed by the acknowledge
bit from the ST25DVxxKC, followed by STOP condition.
• See Section 6.3 Device addressing for I²C RFSwitchOff slave address value explanation.
• I²C “RFSwitchOff“ salve address is not acknowledged only if I2C_CFG register bit 5
(I2C_RF_SWITCHOFF_EN) is set to 0 and is always acknowledged otherwise (even if RF is busy).

Figure 15. I²C “RFSwitchOff” command

ACK

I2C DEVICE
1 0 E0
CODE
Start

Stop

R/W
MS67299

The I²C RFSwitchOn command is defined as follows:

• START condition, followed by I²C “RFSwitchOn” salve address (1 Byte), followed by acknowledge bit from
ST25DVxxKC, followed by STOP condition.
• See Section 6.3 Device addressing for I²C RFSwitchOn slave address value explanation.
• I²C “RFSwitchOn” salve address is not acknowledged only if I2C_CFG register bit 5
(I2C_RF_SWITCHOFF_EN) is set to 0 and is always acknowledged otherwise (even if RF is busy).

Figure 16. I²C “RFSwitchOn” command

ACK

I2C DEVICE
0 0 E0
CODE
Start

Stop

R/W

When ST25DVxxKC receives the I²C “RFSwitchOff” command outside of any RF command processing,
ST25DVxxKC is immediately setting the RF in off mode (see Section 5.2.2 RF management feature description).
If GPO interruption RF_OFF is enabled, a pulse is emitted on the GPO pin after the stop condition of the I²C
“RFSwitchOff” command.
When ST25DVxxKC receives the I²C “RFSwitchOff” command concurrently to an RF command, two possible
cases can happen:

DS13519 - Rev 6 page 32/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

• If there is a write in progress in EEPROM memory, following an RF write command execution, the RF is set
in off mode at the completion of the write in memory. ST25DVxxKC does not answer to the RF request, but
data is written into memory. If GPO interruption RF_OFF is enabled, a pulse is emitted on GPO pin at end
of all write programming cycles.
• If there is no write in progress in EEPROM memory, the RF is set in RF off mode immediately.
ST25DVxxKC does not answer to the RF request. If GPO interruption RF_OFF is enabled, a pulse is
emitted on GPO pin after stop condition of the I²C “RFSwitchOff” command.
Once in RF off mode, I2C host get exclusive access to the ST25DVxxKC, whatever incoming RF requests (which
are ignored).

5.4 GPO
GPO signal is used to alert the I2C host of external RF events or ST25DVxxKC processes activity and also if
some specific I2C events. Several causes could be used to request a host interruption. RF user can also directly
drive GPO pin level using a dedicated RF command.

5.4.1 ST25DVxxKC interrupt capabilities on RF events

ST25DVxxx supports multi interruption mode and can report several events occurring through RF interface.
In this section, all drawings are referring to the open drain version of GPO output (8-pin packages).
The reader can retrieve the behaviour of CMOS version (12-pin package) by inverting the GPO curve polarity and
replace the word “released” or “high-Z” by “pull to ground”.
Supported RF events is listed hereafter:

DS13519 - Rev 6 page 33/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

RF_USER:
• GPO output level is controlled by Manage GPO command (set or reset)
• When RF_USER is activated, GPO level is changed after EOF of ST25DVxxKC response to a Manage
GPO set or reset command (see Section 7.6.30 Manage GPO).
• RF_USER is prevalent over all other GPO events when set by Manage GPO command (other interrupts
are still visible in IT_STS_Dyn status register, but do not change GPO output level).

Figure 17. RF_USER chronogram

1) VCD sends a ManageGPO command with value 00h (set GPO) and ST25DVxxKC replies.
GPO/RF_USER is tied low after ST25DVxxKC response.

S ManageGPO E t1 S ST25DVxxKC E
O 00h O O reply O
command F F
F F

GPO/RF_USER

2) VCD sends a ManageGPO command with value 01h (reset GPO) and ST25DVxxKC replies.
GPO/RF_USER is set high-Z low after ST25DVxxKC response.

S ManageGPO E t1 S ST25DVxxKC E
O 01h O O reply O
command F F
F F

GPO/RF_USER

3) VCD sends a ManageGPO command (any value) and ST25DVxxKC replies with error.
GPO/RF_USER remains high-Z.

S ManageGPO
E t1 S ST25DVxxKC E
O command O O reply O
F F F F

GPO/RF_USER

4) VCD sends a ManageGPO command (any value) and ST25DVxxKC stays quiet (command not for
this VICC, or quiet state). GPO/RF_USER remains high-Z.

S ManageGPO E
O command O
F F

GPO/RF_USER

5) VCD sends any command other than ManageGPO command and ST25DVxxKC replies.
GPO/RF_USER remains high-Z.

S Any other E t1/Wt S ST25DVxxKC E

O O O O
command reply
F F F F

GPO/RF_USER

DS13519 - Rev 6 page 34/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

RF_ACTIVITY:
• GPO output level reflects the RF activity.
• When RF_ACTIVITY is activated, a GPO output level change from RF command EOF to ST25DVxxKC
response EOF.

Figure 18. RF_ACTIVITY chronogram

1) VCD sends a command and ST25DVxxKC replies. GPO/RF_ACTIVITY is released after

ST25DVxxKC response.
S VCD E t1 S ST25DVxxKC E
O O O O
command reply
F F F F

GPO/RF_ACTIVITY

2) VCD sends a write command and ST25DVxxKC replies after write completed. GPO/RF_ACTIVITY
is released after ST25DVxxKC response.

S Write E (m*)Wt S ST25DVxxKC E

O O O O
command reply
F F F F

GPO/RF_ACTIVITY

3) VCD sends a write command with option flag set to 1, and ST25DVxxKC replies after receiving
EOF. GPO/RF_ACTIVITY is released after ST25DVxxKC response.

S Write E >(m*)Wt E t1 S ST25DVxxKC E

O O O O O
command reply
F F F F F

GPO/RF_ACTIVITY

4) VCD sends an Inventory 16 slots command, and ST25DVxxKC replies in its slot. GPO/
RF_ACTIVITY is released after ST25DVxxKC response.

S Inventory E E E t1 S ST25DVxxKC E
O O O O O O
command reply
F F F F F F
Slot 1 Slot n
GPO/RF_ACTIVITY

5) VCD sends a command and ST25DVxxKC stays quiet (Stay Quiet command, command not for this
VICC, or quiet state). GPO/RF_ACTIVITY remains high-Z.

S VCD E
O Command O
F F

GPO/RF_ACTIVITY

DS13519 - Rev 6 page 35/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

RF_INTERRUPT:
• A pulse is emitted on GPO by Manage GPO command (interrupt).
• When RF_INTERRUPT is activated, a pulse of duration IT_TIME is emitted after EOF of ST25DVxxKC
response to a Manage GPO interrupt command (see Section 7.6.30 Manage GPO).

Figure 19. RF_INTERRUPT chronogram

1) VCD sends a ManageGPO command with value 80h (GPO emit pulse) and ST25DVxxKC replies.
GPO/RF_INTERRUPT generates a pulse of duration IT_TIME after ST25DVxxKC response.

S ManageGPO E t1 S ST25DVxxKC E
O 80h O O reply O
command F F
F F

GPO/RF_INTERRUPT

2) VCD sends a ManageGPO command (any value) and ST25DVxxKC replies with error.
GPO/RF_INTERRUPT remains high-Z.

S ManageGPO
E t1 S ST25DVxxKC E
O command O O reply O
F F F F

GPO/RF_INTERRUPT

3) VCD sends a ManageGPO command (any value) and ST25DVxxKC stays quiet (command not for
this VICC, or quiet state). GPO/RF_INTERRUPT remains high-Z.

S ManageGPO E
O command O
F F

GPO/RF_INTERRUPT

4) VCD sends any command other than ManageGPO command and ST25DVxxKC replies.
GPO/RF_INTERRUPT remains high-Z.

S Any other E t1/Wt S ST25DVxxKC E

O command O O O
reply
F F F F

GPO/RF_INTERRUPT

DS13519 - Rev 6 page 36/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

FIELD_CHANGE:
• A pulse is emitted on GPO to signal a change in RF field state.
• When FIELD_CHANGE is activated, and when RF field appear or disappear, GPO emits a pulse of
duration IT_TIME.
• In case of RF field disappear, the pulse is emitted only if VCC power supply is present.
• If RF is configured in RF_SLEEP mode or is in RF_OFF state, field change are not reported on GPO, even
if FIELD_CHANGE event is activated, as shown in Table 28.

Table 28. FIELD_CHANGE when RF is disabled or in sleep of off mode

RF_DISABLE RF_SLEEP RF_OFF GPO behaviour when FIELD_CHANGE is enabled

0 0 0 A pulse is emitted on GPO if RF field appears or disappears (1)

1 0 0 IT_STS_Dyn register is updated.

X 1 X GPO remains High-Z (open drain version) or is tied to ground (CMOS version).
X X 1 IT_STS_Dyn register is not updated.

1. assuming that GPO output is enabled (GPO_EN = 1).

Figure 20. FIELD_CHANGE chronogram

1) RF field appears. GPO/FIELD_CHANGE generates a pulse during IT_TIME.

RF field

S First VCD E t1 S ST25DVxxKC E

O O O O
command reply
F F F F

GPO/FIELD_CHANGE

2) RF field disappears and ST25DVxxKC is powered through VCC. GPO/FIELD_CHANGE generates

a pulse during IT_TIME.

RF field

S VCD E t1 S ST25DVxxKC E
O O O O
command reply
F F F F

GPO/FIELD_CHANGE

3) RF field disappears and ST25DVxxKC is not powered through VCC. GPO/FIELD_CHANGE doesn’t
generates any pulse.

RF field

S VCD E t1 S ST25DVxxKC E
O O O reply O
command
F F F F

GPO/FIELD_CHANGE

DS13519 - Rev 6 page 37/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

RF_PUT_MSG:
• A pulse is emitted on GPO when a message is successfully written by RF in fast transfer mode mailbox.
• When RF_PUT_MSG is activated, a pulse of duration IT_TIME is emitted on GPO at completion of valid
Write Message or Fast Write Message commands (after EOF of ST25DVxxKC response).

Figure 21. RF_PUT_MSG chronogram

1) VCD sends a Write Message or Fast Write Message command and ST25DVxxKC replies with no error.
GPO/RF_PUT_MSG generates a pulse during IT_TIME after ST25DVxxKC response.

S Write Msg E t1 S ST25DVxxKC E

O O O reply O
command
F F F F

GPO/RF_PUT_MSG

2) VCD sends a Write Message or Fast Write Message command and ST25DVxxKC replies with error.
GPO/RF_PUT_MSG remains high-Z.

S Write Msg E t1 S ST25DVxxKC E

O O O reply O
command
F F F F

GPO/RF_PUT_MSG

3) VCD sends Write Message or Fast Write Message command and ST25DVxxKC stays quiet (command
not for this VICC, or quiet state). GPO/RF_PUT_MSG stays high-Z.

S Write Msg E
O Command O
F F

GPO/RF_PUT_MSG

4) VCD sends a any other command than Write Message or Fast Write Message commands and
ST25DVxxKC replies. GPO/RF_PUT_MSG remains high-Z.

S Any other E t1 S ST25DVxxKC E

O O O O
command reply
F F F F

GPO/RF_PUT_MSG

DS13519 - Rev 6 page 38/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

RF_GET_MSG:
• A pulse is emitted on GPO when RF has successfully read a message, up to its last byte, in fast transfer
mode mailbox.
• When RF_GET_MSG is activated, a pulse of duration IT_TIME is emitted on GPO at completion of valid
Read Message or Fast Read Message commands (after EOF of ST25DVxxKC response), and end of
message has been reached.

Figure 22. RF_GET_MSG chronogram

1) VCD sends a Read Message or Fast Read Message command and ST25DVxxKC replies with no error.
GPO/RF_GET_MSG generates a pulse during IT_TIME after ST25DVxxKC response.

S Read Msg E t1 S ST25DVxxKC E

O O O O
command reply
F F F F

GPO/RF_GET_MSG

2) VCD sends a Read Message or Fast Read Message command and ST25DVxxKC replies with
error. GPO/RF_GET_MSG remains high-Z.

S Read Msg E t1 S ST25DVxxKC E

O O O O
command reply
F F F F

GPO/RF_GET_MSG

3) VCD sends Read Message or Fast Read Message command and ST25DVxxKC stays quiet
(command not for this VICC, or quiet state). GPO/RF_GET_MSG stays high-Z.

S Read Msg E
O Command O
F F

GPO/RF_GET_MSG

4) VCD sends any other command than Read Message or Fast Read Message commands and
ST25DV replies. GPO/RF_GET_MSG remains high-Z.

S Any other E t1 S ST25DVxxKC E

O O O reply O
command
F F F F

GPO/RF_GET_MSG

DS13519 - Rev 6 page 39/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

RF_WRITE:
• When RF_WRITE is activated, a pulse of duration IT_TIME is emitted at completion of a valid RF write
operation in EEPROM (after EOF of ST25DVxxKC response).
• Following commands trigger the RF_WRITE interrupt after a valid write operation in EEPROM:
– Write Single Block
– Extended Write Single Block
– Write Multiple Block
– Extended Write Multiple Block
– Lock Block
– Extended Lock Block
– Write AFI
– Lock AFI
– Write DSFID
– Lock DSFID
– Write Configuration
– Write Password
• Note that writing in dynamic registers or fast transfer mode mailbox does not trigger RF_WRITE interrupt
(no write operation in EEPROM).

DS13519 - Rev 6 page 40/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

Figure 23. RF_WRITE chronogram

1) VCD sends a write command and ST25DVxxKC replies after write completed.
GPO/RF_WRITE generates a pulse during IT_TIME after ST25DVxxKC response.

S Write E (m*)Wt S ST25DVxxKC E

O O O reply O
command
F F F F

GPO/RF_WRITE

2) VCD sends a write command with option flag set to 1, and ST25DVxxKC replies after receiving EOF.
GPO/RF_WRITE generates a pulse during IT_TIME after ST25DV response.

S Write E >(m*)Wt E t1 S ST25DVxxKC E

O O O O reply O
command
F F F F F

GPO/RF_WRITE

3) VCD sends a write command and ST25DV GPO/RF_ replies with error.
GPO/RF_WRITE remains high-Z.

S Write E t1 S ST25DVxxKC E
O O O O
command reply
F F F F

GPO/RF_WRITE

4) VCD sends any other command than a write command. GPO/RF_WRITE remains high-Z.

S Any other E t1 S ST25DVxxKC E

O O O reply O
command
F F F F

GPO/RF_WRITE
5) VCD sends any command and ST25DV GPO/RF_ stays quiet (command not for this VICC, or quiet state).
RF_ACTIVITY remains high-Z.
S VCD E
O Command O
F F

GPO/RF_WRITE (OD)

DS13519 - Rev 6 page 41/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

5.4.2 ST25DVxxKC interrupt capabilities on I2C events

On top of RF events, the ST25DVxxKC provides two additional I2C events that can trigger an interrupt on the
GPO pin.
In this section, all drawings are referring to the open drain version of GPO output (8-pin packages).
The reader can retrieve the behaviour of CMOS version (12-pin package) by inverting the GPO curve polarity and
replace the word “released” or “high-Z” by “pull to ground”.
Supported I2C events is listed hereafter:

I2C_WRITE:

• When I2C_WRITE is activated, a pulse of duration IT_TIME is emitted at completion of a valid I2C write
operation in EEPROM (after I2C STOP condition).
• Note that writing in dynamic registers or fast transfer mode mailbox does not trigger I2C_WRITE interrupt
(no write operation in EEPROM).
• The purpose of this GPO interrupt is to inform the I2C host when the I2C write programming cycle in
EEPROM is completed, meaning the I2C bus and RF interface are free for new operation.

Figure 24. GPO/I2C_WRITE chronogram

1) I2C host sends a valid write command to EEPROM. ST25DVxxKC program the data into EEPROM.
GPO/I2C_WRITE generates a pulse during IT_TIME after programming cycle completion.

m * Wt
S I2C Write A P

GPO/I2C_WRITE

2) I2C host sends an invalid write command to EEPROM. ST25DVxxKC does not program the data
into EEPROM. GPO/I2C_WRITE remains High-Z.

S I2C Write N P

GPO/I2C_WRITE

3) I2C host sends a valid write command to Dynamic register or Mailbox. ST25DVxxKC program the
data with no programming cycle. GPO/I2C_WRITE remains high-Z.

S I2C Write A P

GPO/I2C_WRITE MS69215

DS13519 - Rev 6 page 42/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

I2C_RF_OFF:

• When I2C_RF_OFF is activated, a pulse of duration IT_TIME is emitted:

– after the I2C STOP condition of a successful I2C “RFSwitchOff” command if no RF write to EEPROM
is ongoing.
– after the end of all blocks programming if the STOP condition of a successful I2C “RFSwitchOff”
command happens during an RF write to EEPROM.
• The purpose of this GPO interrupt is to inform the I2C master when the I2C RFSwitchOff command has
switched off the RF (RF is in off mode), as the timing action of the I2C RFSwitchOff can vary if an EEPROM
write from RF is ongoing.

Figure 25. GPO/I2C_RF_OFF chronogram

1) I2C host sends a valid I2C RFSwithcOff command and there is no write in progress to EEPROM
memory from RF. RF is swithced off immediately and GPO/I2C_RF_OFF generates a pulse during
IT_TIME after I2C STOP condition.

S I2C RFSwitchOff A P

GPO/I2C_RF_OFF

2) I2C host sends a valid I2C RFSwitchOff command and there is a write in progress to EEPROM
memory from RF. RF is switched off and GPO/I2C_RF_OFF generates a pulse during IT_TIME at end
of EEPROM programming.
Wt(RF)

S I2C RFSwitchOff A P

GPO/I2C_RF_OFF
3) I2C host sends a valid I2C RFSwitchOff command and I2C_RF_SWITCHOFF_EN = 0. RF is not
swithced off and the GPO/I2C_RF_OFF remains high-Z.

S I2C RFSwitchOff A P

GPO/I2C_RF_OFF
MS69216

5.4.3 GPO and power supply

When at the same time RF field is present and VCC is ON, GPO is acting as configured in GPO1, GPO2 and
GPO_CTRL_Dyn registers and both RF events ans I2C events are reflected to the GPO pin.
When VCC is ON and no RF field is present, GPO is acting as configured in GPO2 and GPO_CTRL_Dyn
registers, Only I2C events are reflected on the GPO pin. IT_STS_Dyn register is maintained unchanged until next
I2C read of VCC power off.
When RF field is present and VCC is OFF, GPO is acting as configured in GPO1 (and GPO2 for IT_TIME
configuration only) and GPO_CTRL_Dyn registers. Only RF events are reflected on the GPO pin (assuming
pull-up resistor is supplied with correct voltage for open drain version, or VDCG voltage is supplied for CMOS
version). Exception is FIELD_CHANGE when RF field is falling, which can’t be reported on GPO output if VCC is
off (no power supply on ST25DVxxKC).

DS13519 - Rev 6 page 43/202

 ST25DV04KC ST25DV16KC ST25DV64KC
GPO

Table 29. GPO interrupt capabilities in function of RF field and VCC

RF field VCC LPD GPIO pin

OFF OFF Don't care Remains High-Z (open drain version) or is tied to ground (CMOS version)

ON OFF Don't care State is function of RF events(1)(2)

OFF ON High Remains High-Z (open drain version) or is tied to ground (CMOS version)

ON ON High State is function of RF events(1)(2)

OFF ON Low/unconnected State function of I2C events

ON ON Low/unconnected State is function of both RF and I2C event(1)

1. If pull-up resistor is powered (open drain) or VDCG is powered (CMOS)

2. Except FIELD_CHANGE in case of RF field falling

5.4.4 GPO registers

Four registers are dedicated to this feature:
• Two static registers in system configuration
• Two dynamic registers

Table 30. GPO1 access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @00h R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 0000h
Write Configuration (cmd code A1h) @00h session is open
locked

Table 31. GPO1

Bit Name Function Factory value

0: GPO output is disabled. GPO is High-Z (open drain version) or is tied to

b0 GPO_EN ground (CMOS version). 1b
1: GPO output is enabled. GPO outputs enabled interrupts.
0: disabled
b1 RF_USER_EN 0b
1: GPO output level is controlled by Manage GPO Command (set/reset).
0: disabled
b2 RF_ACTIVITY_EN 0b
1: GPO output level changes from RF command EOF to response EOF.
0: disabled
b3 RF_INTERRUPT_EN 0b
1: GPO output level is controlled by Manage GPO Command (pulse).
0: disabled
b4 FIELD_CHANGE_EN 1b
1: A pulse is emitted on GPO, when RF field appears or disappears.
0: disabled
b5 RF_PUT_MSG_EN 1: A pulse is emitted on GPO at completion of valid RF Write Message 0b
command.
0: disabled
b6 RF_GET_MSG_EN 1: A pulse is emitted on GPO at completion of valid RF Read Message 0b
command if end of message has been reached.
0: disabled
b7 RF_WRITE_EN 1: A pulse is emitted on GPO at completion of valid RF write operation in 0b
EEPROM.

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GPO

Note: Refer to Table 13. System configuration memory map for the GPO1 register:
• Enables the interruption source, and enable GPO output.
• Several interruption sources can be enabled simultaneously.
• The updated value is valid for the next command (except for the RF_WRITE interrupt, which is valid right
after EOF of the Write Configuration command if enabled through RF).
• The GPO_EN bit (b0) is used to disable GPO output. The interruptions are still reported in STS_Dyn
register.
• RF configuration security session (present RF password 0) or I2C security session (present I2C
password) must be open in order to write the GPO1 register.

Table 32. GPO2 access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @01h R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 0001h
Write Configuration (cmd code A1h) @01h session is open
locked

Table 33. GPO2

Bit Name Function Factory value

b7-b5 RFU - 000b

b4-b2 IT_TIME Pulse duration = 301 us - IT_TIME x 37.65 us ± 2 us 011b

0: disabled 1: A pulse is emitted on GPO when I2C host has

b1 I2C_RF_OFF_EN 0b
successfully switched the RF off.
0: disabled 1: A pulse is emitted on GPO at completion of
b0 I2C_WRITE_EN 0b
valid I2C write operation in EEPROM

Note: Refer to Table 13. System configuration memory map for the GPO2 register.
• Defines interrupt pulse duration on GPO pin for the flowing events: RF_INTERRUPT, FIELD_CHANGE,
RF_PUT_MSG, RF_GET_MSG, RF_WRITE , I2C_RF_OFF_EN and I2C_WRITE_EN.
• See Eq. (1) for interrupt duration calculation.

Table 34. GPO_CTRL_Dyn access

RF I2C

Command Type Address Type

Read Dynamic Configuration (cmd code ADh) @00h E2=0, E1=1, b7-b1: RO
RO
Fast Read Dynamic Configuration (cmd code CDh) @00h 2000h b0 : R always, W always

Table 35. GPO_CTRL_Dyn

Bit Name Function Factory value

b7-b1 RFU - 0000000b

0: GPO output is disabled. GPO is High-Z (open drain version) or is tied to ground
b0 GPO_EN (CMOS version). 1b
1: GPO output is enabled. GPO outputs enabled interrupts.

Note: Refer to Table 14. Dynamic registers memory map for the GPO_CTRL_Dyn register.
• Allows I2C host to dynamically enable or disable GPO output by writing in GPO_EN bit (b0).
• GPO_EN bit of GPO_CTRL_Dyn register is prevalent over GPO_EN bit of GPO register.

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GPO

• At power up, and each time GPO register is updated, GPO_EN bit content is copied from GPO register.
• GPO_CTRL_Dyn is a volatile register. Value is maintained only if at least one of the two power sources is
present (RF field or VCC).
• GPO_CTRL_Dyn bit 0 (GPO_EN) can be written even if I2C security session is closed (I2C password not
presented) but is read only for RF user.
• Modifying GPO_CTRL_Dyn bit 0 (GPO_EN), does not affect the value of GPO register bit 0 GPO_EN

Table 36. IT_STS_Dyn access

RF I2C

Command Type Address Type

No access E2=0, E1=1, 2005h RO

Table 37. IT_STS_Dyn

Bit Name Function Factory value

0: Manage GPO reset GPO

b0 RF_USER 0b
1: Manage GPO set GPO
0: No RF access
b1 RF_ACTIVITY 0b
1: RF access
0: No Manage GPO interrupt request
b2 RF_INTERRUPT 0b
1: Manage GPO interrupt request
0: No RF field falling
b3 FIELD_FALLING 0b
1: RF Field falling
0: No RF field rising
b4 FIELD_RISING 0b
1: RF field rising
0: No message put by RF in FTM mailbox
b5 RF_PUT_MSG 0b
1: Message put by RF in FTM mailbox
0: No message read by RF from FTM mailbox
b6 RF_GET_MSG 1: Message read by RF from FTM mailbox, and 'end of 0b
message' reached
0: No write in EEPROM
b7 RF_WRITE 0b
1: Write in EEPROM

Note: Refer to Table 14. Dynamic registers memory map for the IT_STS_Dyn register.
• Cumulates all events which generate interruptions. It should be checked by I2C host to know which event
triggered an interrupt on GPO pin.
• When enabled, RF events are reported in IT_STS_Dyn register even if GPO output is disabled though the
GPO_EN bit.
• Once read the ITSTS_Dyn register is cleared (set to 00h).
• At power up, IT_STS_Dyn content is cleared (set to 00h).
• IT_STS_Dyn is a volatile register. Value is maintained only if at least one of the two power sources is
present (RF field or VCC).

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GPO

5.4.5 Configuring GPO

GPO and interruption pulse duration can be configured by RF user or by I2C host. One or more interrupts can be
enabled at same time.
RF user can use Read Configuration and Write Configuration commands to set accordingly the GPO1 and GPO2
registers, after presenting a valid RF configuration password to open RF configuration security session.
I2C host can write GPO1 and GPO2 registers, after presenting a valid I2C password to open I2C security session.
Enabling or disabling GPO output:
• RF user and I2C host can disable or enable GPO output at power up time by writing in GPO_EN bit 0 of
GPO1 register (if write access is granted).
• I2C host can temporarily enable or disable GPO output at any time by toggling GPO_EN bit 0 of
GPO_CTRL_Dyn register. No password is required to write into GPO_CTRL_Dyn register.
• Disabling GPO output by writing in GPO_EN bit (either in GPO1 or in GPO_CTRL_Dyn registers) does not
disable interruption report in IT_STS_Dyn status register.

Table 38. Enabling or disabling GPO interruptions

GPO1 bit 0: GPO_CTRL_Dyn bit 0:

GPO output
GPO_EN GPO_EN

0 0 GPO remains High-Z (open drain version) or is tied to ground (CMOS version).
1 0 GPO remains High-Z (open drain version) or is tied to ground (CMOS version).

0 1 Activated RF and I2C events are reported on GPO output.(1)

1 1 Activated RF and I2C events are reported on GPO output. (1)

1. If pull-up resistor is powered (open drain version) or VDCG is powered (CMOS version).

Interruption pulse duration configuration:

• Interrupt pulse duration is configured by writing pulse duration value in bits 4 to 2 (IT_TIME) of GPO2
register
• Pulse duration is calculated with the following equation
IT pulse duration equation:
ITpulse duration = 301μs − IT_TIME × 37.65μs ± 2μs (1)

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Energy harvesting (EH)

5.5 Energy harvesting (EH)

5.5.1 Energy harvesting registers

Table 39. EH_MODE access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @02h R always, W if RF configuration security E2=1, E1=1, R always, W if I2C security
Write Configuration (cmd code A1h) @02h session is open and configuration not locked 0002h session is open

Table 40. EH_MODE

Bit Name Function Factory value

0: EH forced after boot

b0 EH_MODE 1b
1: EH on demand only
b7-b1 RFU - 0000000b

Note: Refer to Table 13. System configuration memory map for the EH_MODE register.

Table 41. EH_CTRL_Dyn access

RF I2C

Command Type Address Type

Read Dynamic Configuration (cmd code ADh) @02h

Fast Read Dynamic Configuration (cmd code CDh) @02h b0: R always, W always E2=0, E1=1, b0: R always, W always
Write Dynamic Configuration (cmd code AEh) @02h b1 - b7: RO 2002h b1-b7 : RO
Fast Write Dynamic Configuration (cmd code CEh) @02h

Table 42. EH_CTRL_Dyn

Bit Name Function Factory value

0: Disable EH feature
b0 EH_EN 0b
1: Enable EH feature
0: EH feature is disabled
b1 EH_ON 0b
1: EH feature is enabled
0: RF field is not detected
b2 FIELD_ON Depending of power source
1: RF field is present and ST25DVxxKC may communicate in RF
0: No DC supply detected on VCC pin or Low Power Down mode is forced (LPD is high)
b3 VCC_ON Depending of power source
1: VCC supply is present and Low Power Down mode is not forced (LPD is low)

b7-b4 RFU - 0b

Note: Refer to Table 14. Dynamic registers memory map for the EH_CTRL_Dyn register.

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Energy harvesting (EH)

5.5.2 Energy harvesting feature description

The usage of Energy Harvesting element can be defined in configuration register EH_MODE. When the Energy
harvesting mode is disabled or the RF field strength is not sufficient, the energy harvesting analog voltage output
V_EH is in High-Z state.
EH_MODE Static Register is used to define the Energy Harvesting default strategy after boot.
At boot EH_EN (in EH_CTRL_Dyn register) is set depending EH_MODE value as shown in table below:

Table 43. Energy harvesting at power-up

EH_MODE EH_EN (at boot) Energy harvesting at power-up

0 1 EH enabled after boot (when possible)

EH disabled initially,
1 0
EH delivered on demand (when possible)

Writing 0 in EH_MODE at any time after boot automatically sets EH_EN bit to 1, and thus activate energy
harvesting.
Writing 1 in EH_MODE at any time after boot does not modify EH_EN bit (until next reboot) and thus does not
modify energy harvesting current state.
EH_CTRL_Dyn allows to activate or deactivate on the fly the Energy harvesting (EH_EN) and bring information
on actual state of EH and state of power supplies :
• EH_ON set reflects the EH_EN bit value
• FIELD_ON is set in presence of an RF field
• VCC_ON is set when Host power supply is on, and low power-down mode is not forced.
During boot, EH is not delivered to avoid alteration in device configuration.
Caution: Communication is not guaranteed during EH delivery. Refer to the application note AN4913 (Energy harvesting
delivery impact on ST25DVxxKC behaviour during RF communication).
Energy harvesting can be set even if ST25DVxxKC is in RF disabled or RF Sleep mode, or in Low power mode.
In all these cases, ST25DVxxKC delivers power on V_EH pin if RF field is present. Energy harvesting voltage
output is not regulated.

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Energy harvesting (EH)

5.5.3 EH delivery state diagram

Figure 26. EH delivery state diagram

No EH
requested

RF Field ON
FF Vcc ON Vc
l dO c OF
Fie F
RF N Vc
O cO
F ield N
RF
No EH No EH
requested requested

RF Field OFF RF Field ON

Vcc ON Vc F Vcc OFF
cO OF
FF ld
F Fie
R
EH Vcc ON
Write EH_CTRL_Dyn=1

Write EH_CTRL_Dyn=0
RF Write EH_MODE=0
I2C Write EH_MODE=0

_M ON eld =1
Write EH_MODE=0

i
DE

EH_CTRL_Dyn=1
EH_CTRL_Dyn=0

EH_CTRL_Dyn=0
F
EH_CTRL_Dyn=1

OD RF _MO
E=
1 EH
I2C Write

RF Write
RF Write
I2C Write

Power OFF
or

or
or

RF Field OFF
N Vcc OFF RF
c O =0 EH Fie
Vc ODE _M ld O
_M OD N
EH E=
RF 0
FF Fie
cO
EH Vc ld
OF
F EH
requested delivered
not delivered
RF Field OFF RF Field ON
Vcc ON Vcc OFF
RF
Fie c ON
ld
OF Vc
RF F
Fie F
ld c OF
OF
F Vc
EH
delivered

RF Field ON
Vcc ON

Note: Power is delivered on V_EH only if harvested energy is sufficient to supply ST25DVxxKC and leave over power.
Grey color indicates the states where power is delivered on V_EH pin.

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Data protection

5.5.4 EH delivery sequence

Figure 27. ST25DVxxKC Energy Harvesting Delivery Sequence

No
Boot Boot

Vcc
No No
Boot Boot Boot
RF
Field(1)

With EH_MODE=0 :
Reset Set Reset Set Reset
EH_EN EH_EN EH_EN EH_EN EH_EN EH_EN
EH_ON

V_EH(2)

With EH_MODE=1 :
Set Reset Set Reset Set Set
EH_EN EH_EN EH_EN EH_EN EH_EN EH_EN
EH_EN
EH_ON

V_EH(2)

1. We suppose that the captured RF power is sufficient to trig EH delivery.

2. V_EH = 1 means some µW are available on V_EH pin.
V_EH = 0 means V_EH pin is in high-Z.

5.6 Data protection

ST25DVxxKC provides a special data protection mechanism based on passwords that unlock security sessions.
User memory can be protected for read and/or write access and system configuration can be protected from write
access, both from RF and I2C assess.

5.6.1 Data protection registers

Table 44. RFA1SS access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @04h R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 0004h
Write Configuration (cmd code A1h) @04h session is open
locked

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Data protection

Table 45. RFA1SS

Bit Name Function Factory value

00: Area 1 RF user security session can’t be open by password

01: Area 1 RF user security session is open by RF_PWD_1
b1-b0 PWD_CTRL_A1 00b
10: Area 1 RF user security session is open by RF_PWD_2
11: Area 1 RF user security session is open by RF_PWD_3
00: Area 1 RF access: Read always allowed / Write always allowed
01: Area 1 RF access: Read always allowed, Write allowed if RF user security
session is open
b3-b2 RW_PROTECTION_A1 00b
10: Area 1 RF access: Read always allowed, Write allowed if RF user security
session is open
11: Area 1 RF access: Read always allowed, Write always forbidden
b7-b4 RFU - 0000b

Note: Refer to Table 13. System configuration memory map for the RFA1SS register.

Table 46. RFA2SS access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @06h R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 0006h
Write Configuration (cmd code A1h) @06h session is open
locked

Table 47. RFA2SS

Bit Name Function Factory value

00: Area 2 RF user security session can’t be open by password

01: Area 2 RF user security session is open by RF_PWD_1
b1-b0 PWD_CTRL_A2 00b
10: Area 2 RF user security session is open by RF_PWD_2
11: Area 2 RF user security session is open by RF_PWD_3
00: Area 2 RF access: Read always allowed, Write always allowed
01: Area 2 RF access: Read always allowed, Write allowed if RF user security
session is open
b3-b2 RW_PROTECTION_A2 10: Area 2 RF access: Read allowed if RF user security session is open, Write 00b
allowed if RF user security session is open
11: Area 2 RF access: Read allowed if RF user security session is open, Write
always forbidden

Note: Refer to Table 13. System configuration memory map for the RFA2SS register.

Table 48. RFA3SS access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @08h R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 0008h
Write Configuration (cmd code A1h) @08h session is open
locked

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Data protection

Table 49. RFA3SS

Bit Name Function Factory value

00: Area 3 RF user security session can’t be open by password

01: Area 3 RF user security session is open by RF_PWD_1
b1-b0 PWD_CTRL_A3 00b
10: Area 3 RF user security session is open by RF_PWD_2
11: Area 3 RF user security session is open by RF_PWD_3
00: Area 3 RF access: Read always allowed / Write always allowed
01: Area 3 RF access: Read always allowed, Write allowed if RF user security
session is open
b3-b2 RW_PROTECTION_A3 10: Area 3 RF access: Read allowed if RF user security session is open, Write 00b
allowed if RF user security session is open
11: Area 3 RF access: Read allowed if RF user security session is open, Write
always forbidden
b7-b4 RFU - 0000b

Note: Refer to Table 13. System configuration memory map for the RFA3SS register.

Table 50. RFA4SS access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @0Ah R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 000Ah
Write Configuration (cmd code A1h) @0Ah session is open
locked

Table 51. RFA4SS

Bit Name Function Factory value

00: Area 4RF user security session can’t be open by password

01: Area 4 RF user security session is open by RF_PWD_1
b1-b0 PWD_CTRL_A4 00b
10: Area 4 RF user security session is open by RF_PWD_2
11: Area 4 RF user security session is open by RF_PWD_3
00: Area 4 RF access: Read always allowed, Write always allowed
01: Area 4 RF access: Read always allowed, Write allowed if RF user security
session is open
b3-b2 RW_PROTECTION_A4 10: Area 4 RF access: Read allowed if RF user security session is open, Write 00b
allowed if RF user security session is open
11: Area 4 RF access: Read allowed if RF user security session is open, Write
always forbidden
b7-b4 RFU - 0000b

Note: Refer to Table 13. System configuration memory map for the RFA4SS register.

Table 52. I2CSS access

RF I2C

Command Type Address Type

R always, W if I2C security

No access E2=1, E1=1, 000Bh
session is open

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Table 53. I2CSS

Bit Name Function Factory value

00: Area 1 I2C access: Read always allowed, Write always allowed

01: Area 1 I2C

access: Read always allowed, Write allowed if I2C user security
session is open
b1-b0 RW_PROTECTION_A1 00b
10: Area 1 I2C access: Read always allowed, Write always allowed

11: Area 1 I2C access: Read always allowed, Write allowed if I2C user security
session is open

00: Area 2 I2C access: Read always allowed, Write always allowed

01: Area 2 I2C access: Read always allowed, Write allowed if I2C user security
session is open
b3-b2 RW_PROTECTION_A2 10: Area 2 I2C access: Read allowed if I2C user security session is open, Write 00b
always allowed

11: Area 2 I2C access: Read allowed if I2C security session is open, Write
allowed if I2C security session is open

00: Area 3 I2C access: Read always allowed, Write always allowed

01: Area 3 I2C access: Read always allowed, Write allowed if I2C user security
session is open
b5-b4 RW_PROTECTION_A3 10: Area 3 I2C access: Read allowed if I2C user security session is open, Write 00b
always allowed

11: Area 3 I2C access: Read allowed if I2C security session is open, Write
allowed if I2C security session is open

00: Area 4 I2C access: Read always allowed, Write always allowed

01: Area 4 I2C access: Read always allowed, Write allowed if I2C user security
session is open
b7-b6 RW_PROTECTION_A4 10: Area 4 I2C access: Read allowed if I2C user security session is open, Write 00b
always allowed

11: Area 4 I2C access: Read allowed if I2C security session is open, Write
allowed if I2C security session is open

Note: Refer to Table 13. System configuration memory map for the I2CSS register.

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Table 54. LOCK_CCFILE access

RF I2C

Command Type Address Type

Lock Block (cmd code 22h) @00h/01h (1)

Ext Lock Block (cmd code 32h) @00h/01h
Read Block (cmd code 20h) @00h/01h
Fast Read Block(1) (cmd code C0h) @00h/01h
Ext Read Block(1) (cmd code 30h) @00h/01h
Fast Ext Read Block(1) (cmd code C4h) @00h/01h R always
Read Multi Block(1) (cmd code 23h) @00h/01h E2=1, E1=1, R always, W if I2C
b0: W if Block 00h is not already locked,
000Ch security session is open
Ext Read Multi Block(1) (cmd code 33h) @00h/01h b1: W if Block 01h is not already locked.
Fast Read Multi Block(1) (cmd code C3h)
@00h/01h
Fast Ext Read Multi Block(1) (cmd code C5h)
@00h/01h
Get Multi Block SS (cmd code 2Ch) @00h/01h
Ext Get Multi Block SS (cmd code 3Ch) @00h/01h

1. With option flag set to 1.

Table 55. LOCK_CCFILE

Bit Name Function Factory value

0: Block @ 00h is not Write locked

b0 LCKBCK0 0b
1: Block @ 00h is Write locked
0: Block @ 01h is not Write locked
b1 LCKBCK1 0b
1: Block @ 01h is Write locked
b7-b2 RFU - 000000b

Note: Refer to Table 13. System configuration memory map for the LOCK_CCFILE register.

Table 56. LOCK_CFG access

RF I2C

Command Type Address Type

Read Configuration (cmd code A0h) @0Fh R always, W if RF configuration security

R always, W if I2C security
session is open and configuration not E2=1, E1=1, 000Fh
Write Configuration (cmd code A1h) @0Fh session is open
locked

Table 57. LOCK_CFG

Bit Name Function Factory value

0: Configuration is unlocked
b0 LCK_CFG 0b
1: Configuration is locked
b7-b1 RFU - 0000000b

Note: Refer to Table 13. System configuration memory map for the LOCK_CFG register.

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Table 58. I2C_PWD access

RF I2C

Command Type Address Type

E2=1, E1=1, 0900h to 0907h, Present/Write password

No access R if I2C security session is open, W if I2C security session is open
command format.

Table 59. I2C_PWD

Factory
I2C address Bit Name Function
value

0900h b7-b0 Byte 7 (MSB) of password for I2C security session 00h

0901h b7-b0 Byte 6 of password for I2C security session 00h

0902h b7-b0 Byte 5 of password for I2C security session 00h

0903h b7-b0 Byte 4 of password for I2C security session 00h

I2C_PWD
0904h b7-b0 Byte 3 of password for I2C security session 00h

0905h b7-b0 Byte 2 of password for I2C security session 00h

0906h b7-b0 Byte 1 of password for I2C security session 00h

0907h b7-b0 Byte 0 (LSB) of password for I2C security session 00h

Note: Refer to Table 13. System configuration memory map for the I2C_PWD register.

Table 60. RF_PWD_0 access

RF I2C

Command Type Address Type

Present Password (cmd code B3h) WO if RF configuration security session is

No access
Write Password (cmd code B1h) open

Table 61. RF_PWD_0

Bit Name Function Factory value

Byte 0 (LSB) of password for RF configuration security

00h
session
Byte 1 of password for RF configuration security session 00h
Byte 2 of password for RF configuration security session 00h
Byte 3 of password for RF configuration security session 00h
b7-b0 RF_PWD_0
Byte 4 of password for RF configuration security session 00h
Byte 5 of password for RF configuration security session 00h
Byte 6 of password for RF configuration security session 00h
Byte 7 (MSB) of password for RF configuration security
00h
session

Note: Refer to Table 13. System configuration memory map for the RF_PWD_0 register.

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Table 62. RF_PWD_1 access

RF I2C

Command Type Address Type

Present Password (cmd code B3h) WO if RF configuration security session

No access
Write Password (cmd code B1h) is open with RF password 1

Table 63. RF_PWD_1

Bit Name Function Factory value

Byte 0 (LSB) of password 1 for RF user security session 00h

Byte 1 of password 1 for RF user security session 00h
Byte 2 of password 1 for RF user security session 00h
Byte 3 of password 1 for RF user security session 00h
b7-b0 RF_PWD_1
Byte 4 of password 1 for RF user security session 00h
Byte 5 of password 1 for RF user security session 00h
Byte 6 of password 1 for RF user security session 00h
Byte 7 (MSB) of password 1 for RF user security session 00h

Note: Refer to Table 13. System configuration memory map for the RF_PWD_1 register.

Table 64. RF_PWD_2 access

RF I2C

Command Type Address Type

Present Password (cmd code B3h) WO if RF user security session is open

No access
Write Password (cmd code B1h) with RF password 2

Table 65. RF_PWD_2

Bit Name Function Factory value

Byte 0 (LSB) of password 2 for RF user security session 00h

Byte 1 of password 2 for RF user security session 00h
Byte 2 of password 2 for RF user security session 00h
Byte 3 of password 2 for RF user security session 00h
b7-b0 RF_PWD_2
Byte 4 of password 2 for RF user security session 00h
Byte 5 of password 2 for RF user security session 00h
Byte 6 of password 2 for RF user security session 00h
Byte 7 (MSB) of password 2 for RF user security session 00h

Note: Refer to Table 13. System configuration memory map for the RF_PWD_2 register.

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Data protection

Table 66. RF_PWD_3 access

RF I2C

Command Type Address Type

Present Password (cmd code B3h) WO if RF user security session is open

No access
Write Password (cmd code B1h) with RF password 3

Table 67. RF_PWD_3

Bit Name Function Factory value

Byte 0 (LSB) of password 3for RF user security session 00h

Byte 1 of password 3 for RF user security session 00h
Byte 2 of password 3 for RF user security session 00h
Byte 3 of password 3 for RF user security session 00h
b7-b0 RF_PWD_3
Byte 4 of password 3 for RF user security session 00h
Byte 5 of password 3 for RF user security session 00h
Byte 6 of password 3 for RF user security session 00h
Byte 7 (MSB) of password 3 for RF user security session 00h

Note: Refer to Table 13. System configuration memory map for the RF_PWD_3 register.

Table 68. I2C_SSO_Dyn access

RF I2C

Command Type Address Type

No access E2=0, E1=1, 2004h RO

Table 69. I2C_SSO_Dyn

Bit Name Function Factory value

b7-b1 RFU - 0b

0: I2C security session close

b0 I2C_SSO 1: I2C security session open 0b

(Set or reset via I2C Present password command)

Note: Refer to Table 13. System configuration memory map for the I2C_SSO_Dyn register.

5.6.2 Passwords and security sessions

ST25DVxxKC provides protection of user memory and system configuration static registers. RF user and I2C host
can access those protected data by opening security sessions with the help of passwords. Access rights is more
restricted when security sessions are closed, and less restricted when security sessions are open.
Dynamic registers and fast transfer mode mailbox are not protected by any security session.
There is three type of security sessions, as shown in the table below:

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Data protection

Table 70. Security session type

Security session Open by presenting Right granted when security session is open, and until it is closed

RF password 1, 2 or 3 (1)
RF user access to protected user memory as defined in RFAiSS registers
RF user (RF_PWD_1, RF_PWD_2,
RF user write access to RF password 1, 2 or 3(2)
RF_PWD_3)
RF password 0 RF user write access to configuration static registers
RF configuration
(RF_PWD_0) RF user write access to RF password 0

I2C host access to protected user memory as defined in I2CSS register

I2C password
I2C I2C host write access to configuration static registers
(I2C_PWD)
I2C host write access to I2C password

1. Password number must be the same as the one selected for protection.
2. Write access to the password number corresponding to the password number presented.

All passwords are 64-bit long, and default factory passwords value is 0000000000000000h.
The ST25DVxxKC passwords management is organized around RF and I2C dedicated set of commands to
access the dedicated registers in system configuration area where password values are stored.
The dedicated password commands in RF mode are:
• Write Password command (code B1h): see Section 7.6.36 Present Password.
• Present Password command (code B3h): see Section 7.6.36 Present Password.
RF user possible actions for security sessions are:
• Open RF user security session: Present Password command, with password number 1, 2 or 3 and the
valid corresponding password
• Write RF password: Present Password command, with password number (0, 1, 2 or 3) and the current
valid corresponding password. Then Write Password command, with same password number (0, 1, 2 or 3)
and the new corresponding password.
• Close RF user security session: Present Password command, with a different password number than
the one used to open session or any wrong password. Or remove tag from RF field (POR). Presenting a
password with an invalid password number doesn't close the session.
• Open RF configuration security session: Present Password command, with password number 0 and the
valid password 0.
• Close RF configuration security session: Present Password command, with a password number
different than 0, or password number 0 and wrong password 0. Or remove tag from RF field (POR).
Presenting a password with an invalid password number doesn't close the session.
Opening any new RF security session (user or configuration) automatically close the previously open one (even if
it fails).
There is no interaction between I2C and RF security sessions. Both are independent, and can run in parallel.
Caution: If ST25DVxxKC is powered through VCC, removing VCC during an RF command can abort the command. As a
consequence, before writing a new password, RF user should check if VCC is ON, by reading EH_CTRL_Dyn
register bit 3 (VCC_ON), and eventually ask host to maintain or to shut down VCC, before issuing the Write
Password command in order to avoid password corruption.
To make the application more robust, it is recommended to use addressed or selected mode during write
password operations to get the traceability of which tags/UID have been programmed.

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Data protection

Figure 28. RF security sessions management

ST25DV out
of RF field

RF field ON RF field OFF

All RF
security
Any other sessions
command closed
Present any RF
password not OK(1)
Present
RF_PWD_x OK

RF security
session x
Any other opened
command (y closed)

Present Present
RF_PWD_x OK RF_PWD_y OK

RF security
session y
Any other opened
command (x closed)

1. Presenting a password with an invalid password number doesn't close the session.

The dedicated password commands in I2C mode are:

• I2C Write Password command: see Section 6.6.2 I2C write password command description.
• I2C Present Password command: see Section 6.6.1 I2C present password command description.
I2C host possible actions for security sessions are:
• Open I 2 C security session: I2C Present Password command with valid I2C password.
• Write I 2 C password: I2C Present Password command with valid I2C password. Then I2C Write Password
command with new I2C password.
• Close I 2 C security session: I2C Present Password command with wrong I2C password. Or remove tag
VCC power supply (POR).
• Check if I 2 C security session is open: I2C host can read the current status (open or closed) of I2C
security session by reading the I2C_SSO_Dyn register.
There is no interaction between I2C and RF security sessions. Both are independent and can run in parallel.

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Data protection

Figure 29. I2C security sessions management

VCC OFF

VCC
VCC ON
OFF

Any other
I2C security
command
session closed
I2C_SSO=00h

Present
Present I2C_PWD
I2C_PWD not OK OK

I2C security
Any other session opened
command I2C_SSO=01h

5.6.3 User memory protection

On factory delivery, areas are not protected.
Each area can be individually protected in read and/or write access from RF and I2C.
Area 1 is always readable (from RF and I2C).
Furthermore, RF blocks 0 and 1 (I2C bytes 0000h to 0007h) can be independently write locked.

User memory protection from RF access

In RF mode, each memory area of the ST25DVxxKC can be individually protected by one out of three available
passwords (RF password 1, 2 or 3), and each area can also have individual Read/Write access conditions.
For each area, an RFAiSS register is used to:
• Select the RF password that unlock the RF user security session for this area
• Select the protection against read and write operations for this area
(See Table 45. RFA1SS, Table 47. RFA2SS, Table 49. RFA3SS, and Table 51. RFA4SS for details about available
read and write protections).
Note: Setting 00b in PWD_CTRL_Ai field means that RF user security session cannot be open by any password for
the corresponding area.
When updating RFAiSS registers, the new protection value is effective immediately after the register write
completion.

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Data protection

• Rf blocks 0 and 1 are exceptions to this protection mechanism:

– RF blocks 0 and 1 can be individually write locked by issuing a (Ext) Lock Single Block RF command.
Once locked, they cannot be unlock through RF. LOCK_CCFILE register is automatically updated
when using (Ext) Lock Single Block command.
– An RF user needs no password to lock blocks 0 and/or 1.
– Locking blocks 0 and/or 1 is possible even if the configuration is locked (LOCK_CFG=1).
– Locking blocks 0 and/or 1 is possible even if the area is write locked.
– Unlocking area1 (through RFA1SS register) does not unlock blocks 0 and 1 if they have been locked
though (Ext) Lock Block command.
– Once locked, the RF user cannot unlock blocks 0 and/or 1 (can be done by I2C host).
Note: When areas size are modified (ENDAi registers), RFAiSS registers are not modified.

User memory protection from I2C access

In I2C mode, each area can also have individual Read/Write access conditions, but only one I2C password is used
to unlock I2C security session for all areas.
The I2CSS register is used to set protection against read and write operation for each area (see Table 53. I2CSS
for details about available read and write protections).
When updating I2CSS registers, the new protection value is effective immediately after the register write
completion.
I2C user memory Bytes 0000h to 0003h (RF Block 0) and 0004h to 0007h (RF Block 1) can be individually locked
and unlocked by writing in the LOCK_CCFILE register (by group of 4 Bytes), independently of Area 1 protection.
Unlocking Area 1 (through I2CSS register) does not unlock those bytes if they have been locked though the
LOCK_CCFILE register.
Note: When areas size are modified (ENDAi registers), I2CSS register is not modified.

Retrieve the security status of a user memory block or byte

RF user can read a block security status by issuing following RF commands:
• (Ext) Get Multiple Blocks Security Status command.
• (Ext) (Fast) Read Single Block with option flag set to 1.
• (Ext) (Fast) Read Multiple Blocks with option flag set to 1.
ST25DV responds with a Block security status containing a Lock_bit flag as specified in ISO 15693 standard. This
lock_bit flag is set to one if block is locked against write.
Lock_bit flag value may vary if corresponding RF user security session is open or closed.
I2C host can retrieve a block security status by reading the I2CSS register to get security status of the
corresponding area and by reading the I2C_SSO_Dyn register to know if I2C security session is open or closed.
For blocks 0 and 1 (Bytes 0000h to 0007h in I2C user memory), lock status can also be read in the
LOCK_CCFILE register.

5.6.4 System memory protection

By default, system memory (static registers) is write protected, both in RF and I2C.
I2C host must open the I2C security session (by presenting a valid I2C password) to enable write access to
system configuration static registers.
I2C host doesn’t have read or write access to RF passwords.
By default, I2C host can read all system configuration static registers (except RF passwords)
In RF, to enable write access to system configuration static registers, RF user must open the RF configuration
security session (by presenting a valid RF password 0) and system configuration must not be locked
(LOCK_CFG=00h).
RF doesn’t have read or write access to I2C password.
By default, RF user can read all system configuration static registers, except all passwords, LOCK_CCFILE,
LOCK_DSFID and LOCK_AFI.
RF configuration lock:

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Device parameter registers

• RF write access to system configuration static registers can be locked by writing 01h in the LOCK_CFG
register (by RF or I2C).
• RF user cannot unlock system configuration if LOCK_CFG=01h, even after opening RF configuration
security session (only I2C host can unlock system configuration).
• When system configuration is locked (LOCK_CFG=01h), it is still possible to change RF passwords (0 to
3).
Device identification registers:
• AFI and DFSID registers can be independently locked by RF user, issuing respectively a Lock AFI and a
Lock DSFID command. Lock is definitive: once locked, AFI and DSFID registers cannot be unlocked (either
by RF or I2C). System configuration locking mechanism (LOCK_CFG=01h) does not lock AFI and DSFID
registers.
• Other device identification registers (MEM_SIZE, BLK_SIZE, IC_REF, UID, IC_REV) are read only
registers for both RF and I2C.

5.7 Device parameter registers

Table 71. LOCK_DSFID access

RF I2C

Command Type Address Type

Lock DSFID (cmd code 2Ah) WO if DSFID not locked E2=1, E1=1, 0010h RO

Table 72. LOCK_DSFID

Bit Name Function Factory value

0: DSFID is not locked

b0 LOCK_DSFID 0b
1: DSFID is locked
b7-b1 RFU - 0000000b

Note: Refer to Table 13. System configuration memory map for the LOCK_DSFID register.

Table 73. LOCK_AFI access

RF I2C

Command Type Address Type

Lock AFI (cmd code 28h) WO if AFI not locked E2=1, E1=1, 0011h RO

Table 74. LOCK_AFI

Bit Name Function Factory value

0: AFI is not locked

b0 LOCK_AFI 0b
1: AFI is locked
b7-b1 RFU - 0000000b

Note: Refer to Table 13. System configuration memory map for the LOCK_AFI register.

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Device parameter registers

Table 75. DSFID access

RF I2C

Command Type Address Type

Inventory (cmd code 01h)

Get System Info (cmd code 2Bh)
R always, W if DSFID not locked E2=1, E1=1, 0012h RO
Ext Get System Info (cmd code 3Bh)
Write DSFID (cmd code 28h)

Table 76. DSFID

Bit Name Function Factory value

b7-b0 DSFID ISO/IEC 15693 Data Storage Format Identifier 00h

Note: Refer to Table 13. System configuration memory map for the DSFID register.

Table 77. AFI access

RF I2C

Command Type Address Type

Inventory (cmd code 01h)

Get System Info (cmd code 2Bh)
R always, W if AFI not locked E2=1, E1=1, 0013h RO
Ext Get System Info (cmd code 3Bh)
Write AFI (cmd code 27h)

Table 78. AFI

Bit Name Function Factory value

b7-b0 AFI ISO/IEC 15693 Application Family Identifier 00h

Note: Refer to Table 13. System configuration memory map for the AFI register.

Table 79. MEM_SIZE access

RF I2C

Command Type Address Type

Get System Info (cmd code 2Bh) (1) E2=1, E1=1, 0014h
RO RO
Ext Get System Info (cmd code 3Bh) to 0015h

1. Only ST25DV04KC

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Device parameter registers

Table 80. MEM_SIZE

I2C
Bit Name Function Factory value
Address

ST25DV04KC: 7Fh
Address 0014h: LSB byte of the memory size
0014h b7-b0 ST25DV16KC: FFh
expressed in RF blocks
ST25DV64KC: FFh
MEM_SIZE
ST25DV04KC: 00h
Address 0015h: MSB byte of the memory size
0015h b7-b0 ST25DV16KC: 01h
expressed in RF blocks
ST25DV64KC: 07h

Note: Refer to Table 13. System configuration memory map for the MEM_SIZE register.

Table 81. BLK_SIZE access

RF I2C

Command Type Address Type

Get System Info (cmd code 2Bh) (1)

RO E2=1, E1=1, 0016h RO
Ext Get System Info (cmd code 3Bh)

1. Only ST25DV04KC

Table 82. BLK_SIZE

Bit Name Function Factory value

b7-b0 BLK_SIZE RF user memory block size 03h

Note: Refer to Table 13. System configuration memory map for the BLK_SIZE register.

Table 83. IC_REF access

RF I2C

Command Type Address Type

Get System Info (cmd code 2Bh)

RO E2=1, E1=1, 0017h RO
Ext Get System Info (cmd code 3Bh)

Table 84. IC_REF

Bit Name Function Factory value

ST25DV04KC-IE: 50h
ST25DV16KC-IE: 51h
ST25DV64KC-IE: 51h
b7-b0 IC_REF ISO/IEC 15693 IC Reference
ST25DV04KC-JF: 50h
ST25DV16KC-JF: 51h
ST25DV64KC-JF: 51h

Note: Refer to Table 13. System configuration memory map for the IC_REF register.

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Device parameter registers

Table 85. UID access

RF I2C

Command Type Address Type

Inventory (cmd code 01h)

E2=1, E1=1, 0018h
Get System Info (cmd code 2Bh) RO RO
to 001Fh
Ext Get System Info (cmd code 3Bh)

Table 86. UID

I2C
Bit Name Function Factory 2alue
Address

0018h ISO/IEC 15693 UID byte 0 (LSB)

0019h ISO/IEC 15693 UID byte 1
001Ah ISO/IEC 15693 UID byte 2 IC manufacturer serial number
001Bh ISO/IEC 15693 UID byte 3
001Ch ISO/IEC 15693 UID byte 4
ST25DV04KC-IE: 50h
b7-b0 UID ST25DV16KC-IE: 51h
ST25DV64KC-IE: 51h
001Dh ISO/IEC 15693 UID byte 5: ST Product code
ST25DV04KC-JF: 52h
ST25DV16KC-JF: 53h
ST25DV64KC-JF: 53h
001Eh ISO/IEC 15693 UID byte 6: IC Mfg code 02h
001Fh ISO/IEC 15693 UID byte 7 (MSB) E0h

Note: Refer to Table 13. System configuration memory map for the UID register.

Table 87. IC_REV access

RF I2C

Command Type Address Type

No access E2=1, E1=1, 0020h RO

Table 88. IC_REV

Bit Name Function Factory value

b7-b0 IC_REV IC revision Depending on revision

Note: Refer to Table 13. System configuration memory map for the IC_REV register.

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I²C operation

6 I²C operation

6.1 I²C protocol

The device supports the I²C protocol. This is summarized in Figure 30. I²C bus protocol. Any device that sends
data to the bus is defined as a transmitter, and any device that reads data is defined as a receiver. The device
that controls the data transfer is known as the bus master, and the other as the slave device. A data transfer can
only be initiated by the bus master, which also provides the serial clock for synchronization. The ST25DVxxKC
device is a slave in all communications.

Figure 30. I²C bus protocol

DT00792BV1

STOP
Condition

6.1.1 Start condition

Start is identified by a falling edge of serial data (SDA) while the serial clock (SCL) is stable in the high state.
A Start condition must precede any data transfer command. The device continuously monitors (except during a
write cycle) the SDA and the SCL for a Start condition, and does not respond unless one is given.

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I²C timeout

6.1.2 Stop condition

Stop is identified by a rising edge of serial data (SDA) while the serial clock (SCL) is stable and driven high.
A Stop condition terminates communication between the device and the bus master. A Read command that
is followed by NoAck can be followed by a Stop condition to force the device into the Standby mode. A Stop
condition at the end of a Write command triggers the internal write cycle.

6.1.3 Acknowledge bit (ACK)

The acknowledge bit is used to indicate a successful byte transfer. The bus transmitter, whether a bus master or a
slave device, releases the serial data (SDA) after sending eight bits of data. During the 9th clock pulse period, the
receiver pulls the SDA low to acknowledge the receipt of the eight data bits.

6.1.4 Data input

During data input, the device samples serial data (SDA) on the rising edge of the serial clock (SCL). For correct
device operation, the SDA must be stable during the rising edge of the SCL, and the SDA signal must change
only when the SCL is driven low.

6.2 I²C timeout

During the execution of an I²C operation, RF communications are not possible.
To prevent RF communication freezing due to inadvertent indeterminate instructions sent to the I²C bus, the
ST25DVxxKC features a timeout mechanism that automatically resets the I²C logic block.

6.2.1 I2C timeout on Start condition

I2C communication with the ST25DVxxx starts with a valid Start condition, followed by a device select code.
If the delay between the Start condition and the following rising edge of the serial clock (SCL) that samples the
most significant of the device select exceeds the tSTART_OUT time (see Table 249. I²C DC characteristics up to
85 °C and Table 250. I²C DC characteristics up to 125 °C), the I²C logic block is reset and further incoming data
transfer is ignored until the next valid Start condition.

Figure 31. I²C timeout on Start condition

SCL

SDA

tSTART_OUT
Start
condition

6.2.2 I2C timeout on clock period

During data transfer on the I2C bus, if the serial clock pulse width high (tCHCL) or serial clock pulse width low
(tCLCH) exceeds the maximum value specified in Table 251. I²C AC characteristics up to 85 °C and Table 252. I²C
AC characteristics up to 125 °C, the I2C logic block is reset and any further incoming data transfer is ignored until
the next valid Start condition.

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Device addressing

6.3 Device addressing

To start a communication between the bus master and the slave device, the bus master must initiate a Start
condition. Following this, the bus master sends the device select code, shown in Appendix B.1 Device select
codes (on serial data (SDA), the most significant bit first).
The device select code consists of a 4-bit device type identifier (I2C_DEVICE_CODE) and a 3-bit Chip Enable
“Address” (E2, E1, E0). Chip Enable bits E2 and E1 are used to select ST25DVxxKC memory to address (user or
system) and to send special I2C "RFSwitchOff"and I2C "RFSwitchOn" commands.
The eighth bit is the Read/Write bit (RW). It is set to 1 for read and to 0 for write operations. Refer to the table
below.

Table 89. Device select code

I2C device type identifier E2 E1 E0 R/notW

ST25DvxxKC function
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

User memory 0 1 1/0

System memory 1 1 1/0
I2C_DEVICE_CODE[3:0] I2C_E0
I2C RFSwitchOn 0 0 0
I2C RFSwitchOff 1 0 0

The 4-bit device type identifier and the chip enable bit E0 are configurable through the I2C_CFG static register.

Table 90. I2C_CFG access

RF I2C

Command Type Address Type

No access E2=1, E1=1, 000Eh R always, W if I2C security session is open

Table 91. I2C_CFG

Bit Name Function Factory value

b3-b0 I2C_DEVICE_CODE Device code (bits [7:4]) of I2C slave address 1010b
b4 I2C_E0 E0 bit (bit 1) of I2C slave address 1b
0: I2C cannot switch off/on RF with I2C « RFSwitchOff/On » commands.
b5 I2C_RF_SWITCHOFF_EN 0b
1: I2C can switch off/on RF with i2C « RFSwitchOfff/On » commands
b7-b6 RFU - 00b

Note: Refer to Table 13. System configuration memory map for the UID register.
Change in I2C_CFG command is immediate after STOP condition of the I2C write to this register. Next I2C
accesses shall use the new value of I2C_DEVICE_CODE and I2C_E0 to address the ST25DVxxKC.

If a match occurs on the device select code, the corresponding device gives an acknowledgment on serial data
(SDA) during the ninth bit time. If the device does not match the device select code, it deselects itself from the
bus, and goes into Standby mode.

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I²C Write operations

Table 92. Operating modes

Mode RW bit Bytes Initial sequence

Current address read 1 1 Start, device select, RW = 1

0 Start, device select, RW = 0, address
Random address read 1
1 reStart, device select, RW = 1
Sequential read 1 ≥1 Similar to current or random address read
Byte write 0 1 Start, device select, RW = 0
Sequential write 0 ≤ 256 bytes Start, device select, RW = 0

6.4 I²C Write operations

Following a Start condition, the bus master sends a device select code with the Read/Write bit (RW) reset to 0.
The device acknowledges this, and waits for two address bytes. The device responds to each address byte with
an acknowledge bit, and then waits for the data byte.
Each data byte in the memory has a 16-bit (two-byte wide) address. The most significant byte (see
Table 93. Address most significant byte) is sent first, followed by the least significant byte (see Table 94. Address
least significant byte). Bits b15 to b0 form the address of the byte in memory.

Table 93. Address most significant byte

b15 b14 b13 b12 b11 b10 b9 b8

Table 94. Address least significant byte

b7 b6 b5 b4 b3 b2 b1 b0

When the bus master generates a Stop condition immediately after the Ack bit (in the tenth-bit time slot), either at
the end of a byte write or a sequential write, the internal write cycle is triggered. A Stop condition at any other time
slot does not trigger the internal write cycle.
After the Stop condition, the delay tW, and the successful completion of a Write operation, the device’s internal
address counter is incremented automatically, to point to the next byte address after the last one that was
modified.
After an unsuccessful write operation, ST25DVxxKC enters in I²C dead state: internal address counter is not
incremented, and is waiting for a full new I²C instruction (address counter stops to be incremented after the first
NoAck bit).
During the internal write cycle, the serial data (SDA) signal is disabled internally, and the device does not respond
to any requests.
Caution: I²C Writing data in user memory (EEPROM), transit via the 256 bytes fast transfer mode's buffer. Consequently
fast transfer mode must be deactivated before starting any write operation in user memory, otherwise the
command is NotACK, the programming is not done and device goes in standby mode.

6.4.1 I2C Byte write

After the device select code and the address bytes, the bus master sends one data byte.
If byte write is not inhibited, the device replies with Ack.
If byte write is inhibited, the device replies with NoAck.
The bus master terminates the transfer by generating a Stop condition (see Figure 32. Write mode sequences
when write is not inhibited).
For byte write in EEPROM (user memory or system configuration), internal programming starts after the STOP
condition, for a duration of tW (as defined in Table 249. I²C DC characteristics up to 85 °C and Table 250. I²C DC
characteristics up to 125 °C).
For writes in fast transfer mode buffer or Dynamic registers, internal programming is immediate at STOP
condition.

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I²C Write operations

If byte write is inhibited, the device replies with NoAck. The bus master terminates the transfer by generating a
Stop condition and byte location not is modified (see Figure 33. Write mode sequences when write is inhibited).
Byte write is inhibited if byte complies with one of the following conditions:
• Byte is in user memory and is write protected with LOCK_CCFILE register.
• Byte is in user memory and is write protected with I2CSS register, and I2C security session is closed.
• Byte is in user memory and fast transfer mode is activated.
• Byte is in system memory and is a Read Only register.
• Byte is in system memory and I2C security session is closed.
• Byte is in fast transfer mode’s mailbox and is not the first Byte of mailbox.
• Byte is in fast transfer mode’s mailbox and mailbox is busy.
• Byte is in fast transfer mode’s mailbox and fast transfer mode is not activated.
• Byte is in dynamic registers area and is a Read Only register.

6.4.2 I2C Sequential write

The I2C sequential write allows up to 256 bytes to be written in one command, provided they are all located in the
same user memory area and are all located in writable addresses.
After each byte is transferred, the internal byte address counter is incremented.
For each byte sent by the bus master:
• If byte write is not inhibited, the device replies with Ack.
• If byte write is inhibited, the device replies with NoAck.
The transfer is terminated by the bus master generating a Stop condition:
• For writes in EEPROM (user memory or system configuration), if all bytes have been Ack'ed, internal
programming of all bytes starts after the stop condition, for a duration dependent on the number of bytes to
write (see below).
• For writes in fast transfer mode buffer or Dynamic registers, if all bytes have been Ack'ed, internal
programming is done immediately after the stop condition.
• If some bytes have been NotAck’ed, no internal programming is done (0 byte written).
Byte write is inhibited if byte complies with conditions described in Section 6.4.1 I2C Byte write, in addition:
• Byte is in user memory but does not belong to same area than previous received byte (area border
crossing is forbidden).
• 256 write occurrence have already been reached in the same sequential write.
• More than one byte is trying to be written in system area.
Seen from I2C, user memory is internally organized as rows of 16 bytes. Data located in the same row all share
the same most significant memory address bits b16-b14.
I2C sequential write programming time in the EEPROM memory is dependent on this internal organization: total
programming time is the I2C write time tW (as defined in Table 249. I²C DC characteristics up to 85 °C and
Table 250. I²C DC characteristics up to 125 °C) multiplied by the number of internal EEPROM pages where the
data must be programmed, including incomplete pages.
This means an I2C sequential write allows from 1 up to 16 bytes to be programmed in EEPROM in tW, provided
that they all share the same most significant memory address bits b16-b4.
For example, a successful I2C sequential write of 40 Bytes, starting at address 0010h, has a programming time
(starting after STOP condition) of 3 x tW. An I2C sequential write of 40 Bytes, starting at address 0008h, has a
programming time of 4 x tW.

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 ST25DV04KC ST25DV16KC ST25DV64KC
I²C Write operations

Figure 32. Write mode sequences when write is not inhibited

ACK ACK ACK ACK

Byte
Dev Select Byte address Byte address Data in
Write

Start

Stop
R/W

ACK ACK ACK ACK ACK ACK

Sequential
Dev Select Byte address Byte address Data in 1 Data in 2 Data in N
Write
Start

Stop
R/W

Note: N ≤ 256

Figure 33. Write mode sequences when write is inhibited

ACK ACK ACK NO ACK

Byte
Dev select Byte address Byte address Data in
Write
Start

Stop
R/W

ACK ACK ACK NO ACK

Sequential Dev select Byte address Byte address Data in 1 Data in 2

Write
Start

R/W

NO ACK NO ACK

Sequential
Data in N
Write(cont'd)
Stop

Note: N ≤ 256

6.4.3 Minimizing system delays by polling on ACK

During the internal write cycle, the device disconnects itself from the bus, and writes a copy of the data from
its internal latches to the memory cells. The maximum I²C write time (tw) is shown in Table 251. I²C AC
characteristics up to 85 °C and Table 252. I²C AC characteristics up to 125 °C, but the typical time is shorter. To
make use of this, a polling sequence can be used by the bus master.
The sequence, as shown in Figure 34. Write cycle polling flowchart using ACK is:
• Initial condition: a write cycle is in progress.
• Step 1: the bus master issues a Start condition followed by a device select code (the first byte of the new
instruction).
• Step 2: if the device is busy with the internal write cycle, no Ack is returned and the bus master goes back
to Step 1. If the device has terminated the internal write cycle, it responds with an Ack, indicating that the
device is ready to receive the second part of the instruction (the first byte of this instruction having been
sent during Step 1).

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 ST25DV04KC ST25DV16KC ST25DV64KC
I²C read operations

Note: There is no need of polling when writing in dynamic registers or in mailbox, since programming time is null.

Figure 34. Write cycle polling flowchart using ACK

Write cycle
in progress

Start condition

Device select
with RW = 0

NO ACK
returned

First byte of instruction YES

with RW = 0 already
decoded by the device

Next
NO Operation is YES
addressing the
memory
Send Address
and Receive ACK

Stop

NO YES
StartCondition

Data for the Device select

Write operation with RW = 1

Continue the Continue the

Write operation Random Read operation

6.5 I²C read operations

Read operation in user memory is performed successfully only if:
• Area to which the byte belongs is not read protected by the I2CSS register.
• Area to which the byte belongs is read protected by the I2CSS register, but I²C security session is open.
Read operations in system memory and dynamic registers are done independently of any protection mechanism,
except I2C_PWD register which needs I²C security session to be open first.
Read operation in fast transfer mode’s mailbox is performed successfully only if fast transfer mode is activated.
If read is not successful, ST25DVxxKC releases the bus and I²C host reads byte value FFh.
After the successful completion of a read operation, the device’s internal address counter is incremented by one,
to point to the next byte address.
After an unsuccessful read operation, ST25DVxxKC enters in I²C dead state: internal address counter is not
incremented, and ST25DVxxKC is waiting for a full new I²C instruction.

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 ST25DV04KC ST25DV16KC ST25DV64KC
I²C read operations

6.5.1 Random address read

A dummy write is first performed to load the address into this address counter (as shown in Figure 35. Read
mode sequences) but without sending a Stop condition. Then, the bus master sends another Start condition (aka
reStart), and repeats the device select code, with the Read/Write bit (RW) set to 1. The device acknowledges this,
and outputs the contents of the addressed byte. The bus master must not acknowledge the byte, and terminates
the transfer with a Stop condition.

6.5.2 Current address read

For the Current address read operation, following a Start condition, the bus master only sends a device select
code with the Read/Write bit (RW) set to 1. The device acknowledges this, and outputs the byte addressed by
the internal address counter. The counter is then incremented. The bus master terminates the transfer with a Stop
condition, as shown in the figure below, without acknowledging the byte.

Figure 35. Read mode sequences

ACK NO ACK
Current address read
Dev sel Data out
Start

Stop
R/W

ACK ACK ACK ACK NO ACK

Random address read
Dev sel * Byte addr Byte addr Dev sel * Data out
Start

Start

Stop
R/W R/W

ACK ACK ACK NO ACK

Sequential current read
Dev sel Data out 1 Data out N
Start

Stop

R/W

ACK ACK ACK ACK ACK

Sequential random read
Dev sel * Byte addr Byte addr Dev sel * Data out1
Start

Start

R/W R/W

ACK NO ACK

Data out N
Stop

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 ST25DV04KC ST25DV16KC ST25DV64KC
I²C password management

6.5.3 Sequential read access

This operation can be used after a Current address read or a Random address read. The bus master does
acknowledge the data byte output, and sends additional clock pulses so that the device continues to output the
next byte in sequence. To terminate the stream of bytes, the bus master must not acknowledge the last byte, and
must generate a Stop condition, as shown in Figure 35. Read mode sequences.
The output data comes from consecutive addresses, with the internal address counter automatically incremented
after each byte output.
Sequential read in user memory:
• Sequential read can cross area borders. Device continue to output data bytes until the internal address
counter is reaching a non readable address (either address that don't exist or if read protected with I2C
security session closed).
• When internal address counter reach a non readable address, device releases the SDA line and continues
to output FFh.
• There is no roll over at the end of user memory. When internal address counter reaches end of user
memory, device continue to output bytes located in Dynamic registers area, until it reaches a non readable
address.
Sequential read in system memory:
• There is no roll over after reaching end of system memory (ST25DVxxKC returns only FFh after last
system memory byte address).
Sequential read in dynamic registers:
• It is possible to read sequentially dynamic register and fast transfer mode’s mailbox (contiguous I2C
addresses). There is no roll over at the end of dynamic registers area.
Sequential read in mailbox:
• There is no roll over at the end of the mailbox (ST25DVxxKC returns only FFh after last mailbox memory
byte address).

6.5.4 Acknowledge in read mode

For all Read commands, the device waits, after each byte read, for an acknowledgement during the ninth bit time.
If the bus master does not drive serial data (SDA) low during this time, the device terminates the data transfer and
switches to its Standby mode.

6.6 I²C password management

The controls I²C security session using an I²C 64-bit password. This I²C password is managed with two I²C
dedicated commands: I²C present password and I²C write password.

6.6.1 I2C present password command description

The I2C present password command is used in I2C mode to present the password to the ST25DVxxKC. This is
used to open I2C security session or to allow I2C password modification (see Section 5.6 Data protection for
detailed explanation about password usage).
Following a Start condition, the bus master sends a device select code with the Read/ Write bit (R W ) reset to 0
and the Chip Enable bit E2 at 1 and E1 at 1. The device acknowledges this, as shown in Figure 36. I2C Present
Password Sequence, and waits for two I2C password address bytes, 09h and 00h. The device responds to each
address byte with an acknowledge bit, and then waits for the eight password data bytes, the validation code, 09h,
and a resend of the eight password data bytes. The most significant byte of the password is sent first, followed by
the least significant bytes.
It is necessary to send the 64-bit password twice to prevent any data corruption during the sequence. If the two
64-bit passwords sent are not exactly the same, the ST25DVxxKC does not start the internal comparison.
When the bus master generates a Stop condition, immediately after the Ack bit (during the tenth bit time slot), the
ST25DVxxKC compares the 64 received data bits with the 64 bits of the stored I2C password. If the values match,
the I2C security session is open, and the I2C_SSO_Dyn register is set to 01h. If the values do not match, the I2C
security session is closed and I2C_SSO_dyn register is set to 00h.
I2C_SSO_Dyn is a Dynamic register, it can be checked via I2C host to know If I2C security session is open.

DS13519 - Rev 6 page 75/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C password management

Figure 36. I2C Present Password Sequence

Ack Ack Ack Ack Ack Ack Ack Ack Ack Ack Ack
Device Password Password Password Password Password Password Password Password Password Password
select code Address 09h Address 00h [63:56] [55:48] [47:40] [39:32] [31:24] [23:16] [15:8] [7:0]
Start

R/W
Ack
Ack Ack Ack Ack Ack Ack Ack Ack
Validation Password Password Password Password Password Password Password Password
code 09h [63:56] [55:48] [47:40] [39:32] [31:24] [23:16] [15:08] [7:0]

Stop
Ack generated during 9th bit time slot.

6.6.2 I2C write password command description

The I2C write password command is used to update the I2C password value (register I2C_PWD). It cannot be
used to update any of the RF passwords. After the write cycle, the new I2C password value is automatically
activated. The I2C password value can only be modified after issuing a valid I2C present password command.
Following a Start condition, the bus master sends a device select code with the Read/Write bit (RW) reset to 0
and the Chip Enable bit E2 at 1 and E1 at 1. The device acknowledges this, as shown in Figure 37. I2C Write
Password Sequence, and waits for the two I2C password address bytes, 09h and 00h. The device responds
to each address byte with an acknowledge bit, and then waits for the four password data bytes, the validation
code, 07h, and a resend of the eight password data bytes. The most significant byte of the password is sent first,
followed by the least significant bytes.
It is necessary to send twice the 64-bit password to prevent any data corruption during the write sequence. If the
two 64-bit passwords sent are not exactly the same, the ST25DVxxKC does not modify the I2C password value.
When the bus master generates a Stop condition immediately after the Ack bit (during the tenth bit time slot), the
internal write cycle is triggered. A Stop condition at any other time does not trigger the internal write cycle.
During the internal write cycle, the serial data (SDA) signal is disabled internally, and the device does not respond
to any requests.
Caution: I2C write password command data transits via the 256-byte fast transfer mode's buffer. Consequently fast
transfer mode must be deactivated before issuing a write password command, otherwise command is NotACK
(after address LSB), and programming is not done and device goes in standby mode.

Figure 37. I2C Write Password Sequence

Ack Ack Ack Ack Ack Ack Ack Ack Ack Ack Ack
Device Password Password Password Password Password Password Password Password Password Password
select code Address 09h Address 00h [63:56] [55:48] [47:40] [39:32] [31:24] [23:16] [15:08] [7:0]
Start

R/W
Ack Ack Ack Ack Ack Ack Ack Ack Ack
Validation Password Password Password Password Password Password Password Password
code 07h [63:56] [55:48] [47:40] [39:32] [31:24] [23:16] [15:08] [7:0]
Stop

Ack generated during 9th bit time slot.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF operations

7 RF operations

Contactless exchanges are performed in RF mode as specified by ISO/IEC 15693 or NFC Forum Type 5.
The ST25DVxxKC communicates via the 13.56 MHz carrier electromagnetic wave on which incoming data are
demodulated from the received signal amplitude modulation (ASK: amplitude shift keying). The received ASK
wave is 10% or 100% modulated with a data rate of 1.6 kbit/s using the 1/256 pulse coding mode or a data rate of
26 kbit/s using the 1/4 pulse coding mode.
Outgoing data are generated by the ST25DVxxKC load variation using Manchester coding with one or two
subcarrier frequencies at 423 kHz and 484 kHz. Data are transferred from the ST25DVxxKC at 6.6 kbit/s in low
data rate mode and 26 kbit/s in high data rate mode. The ST25DVxxKC supports the 53 kbit/s in high data rate
mode in one subcarrier frequency at 423 kHz.
The ST25DVxxKC follows ISO/IEC 15693 or NFC Forum Type 5 recommendation for radio-frequency power and
signal interface and for anticollision and transmission protocol.

7.1 RF communication

7.1.1 Access to a ISO/IEC 15693 device

The dialog between the “RF reader” and the ST25DVxxKC takes place as follows:
• activation of the ST25DVxxKC by the RF operating field of the reader
• transmission of a command by the reader (ST25DVxxKC detects carrier amplitude modulation)
• transmission of a response by the ST25DVxxKC using load modulation
These operations use the RF power transfer and communication signal interface described below (see Power
transfer, Frequency and Operating field). This technique is called RTF (Reader talk first).

Operating field
The ST25DVxxKC operates continuously between the minimum and maximum values of the electromagnetic field
H defined in Table 256. RF characteristics. The Reader has to generate a field within these limits.

Power transfer
Power is transferred to the ST25DVxxKC by radio frequency at 13.56 MHz via coupling antennas in the
ST25DVxxKC and the Reader. The RF operating field of the reader is transformed on the ST25DVxxKC antenna
to an AC voltage which is rectified, filtered and internally regulated. During communications, the amplitude
modulation (ASK) on this received signal is demodulated by the ASK demodulator

Frequency
The ISO 15693 standard defines the carrier frequency (fC) of the operating field as 13.56 MHz ±7 kHz.

7.2 RF communication and energy harvesting

As the current consumption can affect the AC signal delivered by the antenna, RF communications with
ST25DVxxKC are not guaranteed during voltage delivery on the energy harvesting analog output V_EH.

7.3 Fast transfer mode mailbox access in RF

Thanks to dedicated commands, the RF interface has the possibility to check Mailbox availability, and the
capability to access it directly to put or get a message from it (see Section 5.1 Fast transfer mode (FTM) for
specific features).

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description

7.4 RF protocol description

7.4.1 Protocol description

The transmission protocol (or simply “the protocol”) defines the mechanism used to exchange instructions and
data between the VCD (Vicinity Coupling Device) and the ST25DVxxKC in both directions. It is based on the
concept of “VCD talks first”.
This means that a ST25DVxxKC does not start transmitting unless it has received and properly decoded an
instruction sent by the VCD. The protocol is based on an exchange of:
• a request from the VCD to the ST25DVxxKC,
• a response from the ST25DVxxKC to the VCD.
Each request and each response are contained in a frame. The frame are delimited by a Start of Frame (SOF)
and End of Frame (EOF).
The protocol is bit-oriented. The number of bits transmitted in a frame is a multiple of eight (8), that is an integer
number of bytes.
A single-byte field is transmitted least significant bit (LSBit) first. A multiple-byte field is transmitted least
significant byte (LSByte) first and each byte is transmitted least significant bit (LSBit) first.

Figure 38. ST25DVxxKC protocol timing

Request Request
VCD frame frame

Response Response
ST25DVxxKC frame frame

Timing t1 t2 t1 t2

7.4.2 ST25DVxxKC states referring to RF protocol

The ST25DVxxKC can be in one of four states:
• Power-off
• Ready
• Quiet
• Selected
Transitions between these states are specified in Figure 39. ST25DVxxKC state transition diagram and
Table 95. ST25DVxxKC response depending on Request_flags.

Power-off state
The ST25DVxxKC is in the Power-off state when it does not receive enough energy from the VCD.

Ready state
The ST25DVxxKC is in the Ready state when it receives enough energy from the VCD. When in the Ready state,
the ST25DVxxKC answers any request where the Select_flag is not set.

Quiet state
When in the Quiet state, the ST25DVxxKC answers any request with the Address_flag set, except for Inventory
requests.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description

Selected state
In the Selected state, the ST25DVxxKC answers any request in all modes (see Section 7.4.3 Modes):
• Request in Select mode with the Select_flag set
• Request in Addressed mode if the UID matches
• Request in Non-Addressed mode as it is the mode for general requests

Table 95. ST25DVxxKC response depending on Request_flags

Address_flag Select_flag
Flags 1 0 1 0
Addressed Non addressed Selected Non selected

ST25DVxxKC in Ready or Selected

state (Devices in Quiet state do not - X - X
answer)
ST25DVxxKC in Selected state - X X -
ST25DVxxKC in Ready, Quiet or
Selected state (the device which X - - X
matches the UID)
Error (03h) or no response (command
X - X -
dependent)

Figure 39. ST25DVxxKC state transition diagram

Power off

Out of field In RF field

after tRF_OFF

Any other command

Inventory Ready
where Select_Flag
is not set
Out of RF field
after tRF_OFF Out of RF field
Se

after tRF_OFF
Re lec t w
y

)
ID

le
ad

Se elec

ct
se t_ ith
(U
re

(U
t t Fla (#
iet
o

ID
tt

qu

re g is UID

)
se

ad s
ay
Re

y et )
St

wh or
er
e

Select (UID)
Quiet
Stay quiet(UID)
Selected

Any other command where the

Address_Flag is set AND where Any other command
DT43017V2

the Inventory_Flag is not set

1. The ST25DVxxKC returns to the Power Off state if the tag is out of the RF field for at least tRF_OFF.
The intention of the state transition method is that only one ST25DVxxKC should be in the Selected state at a
time.
When the Select_flag is set to 1, the request shall NOT contain a unique ID.
When the address_flag is set to 0, the request shall NOT contain a unique ID.

7.4.3 Modes
The term “mode” refers to the mechanism used in a request to specify the set of ST25DVxxKC devices that shall
execute the request.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description

Addressed mode
When the Address_flag is set to 1 (Addressed mode), the request contains the Unique ID (UID) of the addressed
ST25DVxxKC.
Any ST25DVxxKC that receives a request with the Address_flag set to 1 compares the received Unique ID to its
own. If it matches, then the ST25DVxxKC executes the request (if possible) and returns a response to the VCD
as specified in the command description.
If the UID does not match, then it remains silent.

Non-addressed mode (general request)

When the Address_flag is cleared to 0 (Non-Addressed mode), the request does not contain a Unique ID.

Select mode
When the Select_flag is set to 1 (Select mode), the request does not contain a unique ID. The ST25DVxxKC in
the Selected state that receives a request with the Select_flag set to 1 executes it and returns a response to the
VCD as specified in the command description.
Only the ST25DVxxKC in the Selected state answers a request where the Select_flag is set to 1.
The system design ensures that only one ST25DVxxKC can be in the Select state at a time.

7.4.4 Request format

The request consists of:
• an SOF,
• flags,
• a command code,
• parameters and data,
• a CRC,
• an EOF.

Table 96. General request format

SOF Request_flags Command code Parameters Data 2 bytes CRC EOF

7.4.5 Request flags

In a request, the “flags” field specifies the actions to be performed by the ST25DVxxKC and whether
corresponding fields are present or not.
The flags field consists of eight bits. Bit 3 (Inventory_flag) of the request flag defines the contents of the four
MSBs (bits 5 to 8). When bit 3 is reset (0), bits 5 to 8 define the ST25DVxxKC selection criteria. When bit 3 is set
(1), bits 5 to 8 define the ST25DVxxKC Inventory parameters.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description

Table 97. Definition of request flags 1 to 4

Bit No Flag Level Description

0 A single subcarrier frequency is used by the ST25DVxxKC

Bit 1 Subcarrier_flag (1)
1 Two subcarriers are used by the ST25DVxxKC
0 Low data rate is used
Bit 2 Data_rate_flag (2)
1 High data rate is used
0 The meaning of flags 5 to 8 is described in Table 98
Bit 3 Inventory_flag
1 The meaning of flags 5 to 8 is described in Table 99
0 No Protocol format extension
Bit 4 Protocol_extension_flag
1 Protocol format extension. Reserved for future use.

1. Subcarrier_flag refers to the ST25DVxxKC-to-VCD communication.

2. Data_rate_flag refers to the ST25DVxxKC-to-VCD communication.

Table 98. Request flags 5 to 8 when inventory_flag, Bit 3 = 0

Bit nb Flag Level Description

The request is executed by any ST25DVxxKC according to

0
the setting of Address_flag
Bit 5 Select flag (1)
The request is executed only by the ST25DVxxKC in Selected
1
state
The request is not addressed. UID field is not present. The
0
request is executed by all ST25DVxxKCs.
Bit 6 Address flag The request is addressed. UID field is present. The request is
1 executed only by the ST25DVxxKC whose UID matches the
UID specified in the request.
0 Option not activated.
Bit 7 Option flag
1 Option activated.
Bit 8 RFU 0 -

1. If the Select_flag is set to 1, the Address_flag is set to 0 and the UID field is not present in the request.

Table 99. Request flags 5 to 8 when inventory_flag, Bit 3 = 1

Bit nb Flag Level Description

0 AFI field is not present

Bit 5 AFI flag
1 AFI field is present
0 16 slots
Bit 6 Nb_slots flag
1 1 slot
Bit 7 Option flag 0 -
Bit 8 RFU 0 -

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description

7.4.6 Response format

The response consists of:
• an SOF
• flags
• parameters and data
• a CRC
• an EOF

Table 100. General response format

SOF Response_flags Parameters Data 2 byte CRC EOF

7.4.7 Response flags

In a response, the flags indicate how actions have been performed by the ST25DVxxKC and whether
corresponding fields are present or not. The response flags consist of eight bits.

Table 101. Definitions of response flags 1 to 8

Bit Nb Flag Level Description

0 No error
Bit 1 Error_flag
1 Error detected. Error code is in the “Error” field.
ResponseBuffer
Bit 2 0 Not supported, always set to 0
Validity_flag
Final
Bit 3 0 Not supported, always set to 0
response_flag
Bit 4 Extension flag 0 Not supported, always set to 0
Block security
Bit 6-5 0 Not supported, always set to 0
status length_flag
Waiting time
Bit 7 extension 0 Not supported, always set to 0
request_flag
Bit 8 RFU 0 -

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 ST25DV04KC ST25DV16KC ST25DV64KC
Timing definition

7.4.8 Response and error code

If the Error_flag is set by the ST25DVxxKC in the response, the Error code field is present and provides
information about the error that occurred.
Error codes not specified in Table 102 are reserved for future use.

Table 102. Response error code definition

Error code Meaning

01h Command is not supported.

02h Command is not recognized (format error).
03h The option is not supported.
0Fh Error with no information given.
10h The specified block is not available.
11h The specified block is already locked and thus cannot be locked again.
12h The specified block is locked and its contents cannot be changed.
13h The specified block was not successfully programmed.
14h The specified block was not successfully locked.
15h The specified block is protected in read.

7.5 Timing definition

t1: ST25DVxxKC response delay

Upon detection of the rising edge of the EOF received from the VCD, the ST25DVxxKC waits for a t1nom time
before transmitting its response to a VCD request or switching to the next slot during an inventory process. Values
of t1 are given in Table 103. Timing values.

t2: VCD new request delay

t2 is the time after which the VCD may send an EOF to switch to the next slot when one or more ST25DVxxKC
responses have been received during an Inventory command. It starts from the reception of the EOF from the
ST25DVxxKCs.
The EOF sent by the VCD may be either 10% or 100% modulated regardless of the modulation index used for
transmitting the VCD request to the ST25DVxxKC.
t2 is also the time after which the VCD may send a new request to the ST25DVxxKC, as described in
Figure 38. ST25DVxxKC protocol timing.
Values of t2 are given in Table 103.

t3: VCD new request delay when no response is received from the ST25DVxxKC

t3 is the time after which the VCD may send an EOF to switch to the next slot when no ST25DVxxKC response
has been received.
The EOF sent by the VCD may be either 10% or 100% modulated regardless of the modulation index used for
transmitting the VCD request to the ST25DVxxKC.
From the time the VCD has generated the rising edge of an EOF:
• If this EOF is 100% modulated, the VCD waits for a time at least equal to t3min for 100% modulation before
sending a new EOF.
• If this EOF is 10% modulated, the VCD waits for a time at least equal to t3min for 10% modulation before
sending a new EOF.

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 ST25DV04KC ST25DV16KC ST25DV64KC
Timing definition

Table 103. Timing values

Minimum (min) values

Nominal (nom) values Maximum (max) values
100% modulation 10% modulation

t1 4320 / fc = 318.6 µs 4352 / fc = 320.9 µs 4384 / fc = 323.3 µs (1)

t2 4192 / fc = 309.2 µs No tnom No tmax

t3 t1max(2) + tSOF (3) t1max(2) + tNRT(4) + t2min No tnom No tmax

1. VCD request is interpreted during the first milliseconds following the RF field rising.
2. t1max does not apply for write-alike requests. Timing conditions for write-alike requests are defined in the command description.
3. tSOF is the time taken by the ST25DVxxKC to transmit an SOF to the VCD. tSOF depends on the current data rate: High data rate or Low
data rate.
4. tNRT is the nominal response time of the ST25DVxxKC. tNRT depends on VICC to ST25DVxxKC data rate and subcarrier modulation mode.

Note: The tolerance of specific timings is ± 32/fC.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF commands

7.6 RF commands

7.6.1 RF command code list

The ST25DVxxKC supports the following legacy and extended RF command set:
• Inventory, used to perform the anticollision sequence.
• Stay Quiet, used to put the ST25DVxxKC in quiet mode, where it does not respond to any inventory
command.
• Select, used to select the ST25DVxxKC. After this command, the ST25DVxxKC processes all Read/Write
commands with Select_flag set.
• Reset To Ready, used to put the ST25DVxxKC in the ready state.
• Read Single Block and Extended Read Single Block, used to output the 32 bit of the selected block and
its locking status.
• Write Single Block and Extended Write Single Block, used to write and verify the new content for an
update of a 32 bit block, provided that it is not in a locked memory area.
• Read Multiple Blocks and Extended Read Multiple Block, used to read the selected blocks in an unique
area, and send back their value.
• Write Multiple Blocks and Extended Write Multiple Block, used to write and verify the new content for
an update of up to 4 blocks located in the same memory area, which was not previously locked for writing.
• Write AFI, used to write the 8-bit value in the AFI register.
• Lock AFI, used to lock the AFI register.
• Write DSFID, used to write the 8-bit value in the DSFID register.
• Lock DSFID, used to lock the DSFID register.
• Get System information and Extended Get System Information, used to provide the system information
value.
• Get System information, used to provide the standard system information values.
• Extended Get System Information, used to provide the extended system information values.
• Write Password, used to update the 64-bit of the selected areas or configuration password, but only after
presenting the current one.
• Lock Block and Extended Lock block, used to write the CC file blocks security status bits (Protect the
CC File content against writing).
• Present Password, enables the user to present a password to open a security session.
• Fast Read Single Block and Fast Extended Read Single Block, used to output the 32 bits of the
selected block and its locking status at doubled data rate.
• Fast Read Multiple Blocks and Fast Extended Read Multiple Blocks, used to read the selected blocks
in a single area and send back their value at doubled data rate.
• Read Message, used to output up to 256 byte of the Mailbox.
• Read Message Length, used to output the Mailbox message length.
• Fast Read Message, used to output up to 256 byte of the mailbox, at double data rate.
• Write Message, used to write up to 256 byte in the Mailbox.
• Fast Read Message Length, used to ouput the mailbox length, at double data rate.
• Fast Write Message, used to write up to 256 bytes in the mailbox, with answer at double data rate.
• Read Configuration, used to read static configuration registers.
• Write Configuration, used to write static configuration registers.
• Read Dynamic Configuration, used to read dynamic register.
• Write Dynamic Configuration , used to write dynamic register.
• Fast Read Dynamic Configuration, used to read dynamic register, at double data rate.
• Fast Write Dynamic Configuration, used to write dynamic register, with answer at double data rate.
• Manage GPO, used to drive GPO output value when corresponding GPO mode is enabled.

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7.6.2 Command codes list

The ST25DVxxKC supports the commands described in this section. Their codes are given in Table 104.

Table 104. Command codes

Command Command
Function Function
code standard code custom

01h Inventory A0h Read Configuration

02h Stay Quiet A1h Write Configuration
20h Read Single Block A9h Manage GPO
21h Write Single Block AAh Write Message
22h Lock Block ABh Read Message Length
23h Read Multiple Blocks ACh Read Message
24h Write Multiple Blocks ADh Read Dynamic Configuration
25h Select AEh Write Dynamic Configuration
26h Reset to Ready B1h Write Password
27h Write AFI B3h Present Password
28h Lock AFI C0h Fast Read Single Block
29h Write DSFID C3h Fast Read Multiple Blocks
2Ah Lock DSFID CDh Fast Read Dynamic Configuration
2Bh Get System Info CEh Fast Write Dynamic Configuration
2Ch Get Multiple Block Security Status - -
30h Extended Read Single Block C4h Fast Extended Read Single Block
31h Extended Write Single Block C5h Fast Extended Read Multiple Block
32h Extended Lock block CAh Fast Write Message
33h Extended Read Multiple Blocks CBh Fast Read Message Length
34h Extended Write Multiple Blocks CCh Fast Read Message
3Bh Extended Get System Info - -
3Ch Extended Get Multiple Block Security Status - -

7.6.3 General command rules

In case of a valid command, the following paragraphs describe the expected behaviour for each command.
But in case of an invalid command, in a general manner, the ST25DVxxKC behaves as follows:
1. If flag usage is incorrect, the error code 03h is issued only if the right UID is used in the command,
otherwise no response is issued.
2. The error code 02h is issued if the custom command is used with the manufacturer code different from the
ST one.
Another case is if I2C is busy. In this case, any RF command (except Inventory, Select, Stay quiet and Reset to
ready) gets 0Fh error code as response only:
• If select flag and address flags are not set at the same time (except if ST25DVxxKC is in quiet state)
• If select flag is set and ST25DVxxKC is in selected state.
For all other commands, if I2C is busy, no response is issued by ST25DVxxKC.

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7.6.4 Inventory
Upon receiving the Inventory request, the ST25DVxxKC runs the anticollision sequence. The Inventory_flag is set
to 1. The meaning of flags 5 to 8 is shown in Table 99. Request flags 5 to 8 when inventory_flag, Bit 3 = 1.
The request contains:
• the flags
• the Inventory command code (001)
• the AFI if the AFI flag is set
• the mask length
• the mask value if mask length is different from 0
• the CRC
The ST25DVxxKC does not generate any answer in case of error.

Table 105. Inventory request format

Request Request
Request_flags Inventory Optional AFI Mask length Mask value CRC16
SOF EOF

- 8 bits 01h 8 bits 8 bits 0 - 64 bits 16 bits -

The response contains:

• the flags
• the Unique ID

Table 106. Inventory response format

Response SOF Response_flags DSFID UID CRC16 Response EOF

- 8 bits 8 bits 64 bits 16 bits -

During an Inventory process, if the VCD does not receive an RF ST25DVxxKC response, it waits for a time t3
before sending an EOF to switch to the next slot. t3 starts from the rising edge of the request EOF sent by the
VCD.
• If the VCD sends a 100% modulated EOF, the minimum value of t3 is:
t3min = 4384/fC (323.3µs) + tSOF
• If the VCD sends a 10% modulated EOF, the minimum value of t3 is:
t3min = 4384/fC (323.3µs) + tNRT + t2min
where:
• tSOF is the time required by the ST25DVxxKC to transmit an SOF to the VCD,
• tNRT is the nominal response time of the ST25DVxxKC.
tNRT and tSOF are dependent on the ST25DVxxKC-to-VCD data rate and subcarrier modulation mode.
Note: In case of error, no response is sent by ST25DVxxKC.

7.6.5 Stay Quiet

On receiving the Stay Quiet command, the ST25DVxxKC enters the Quiet state if no error occurs, and does NOT
send back a response. There is NO response to the Stay Quiet command even if an error occurs.
The Option_flag is not supported. The Inventory_flag must be set to 0.
When in the Quiet state:
• the ST25DVxxKC does not process any request if the Inventory_flag is set,
• the ST25DVxxKC processes any Addressed request.
The ST25DVxxKC exits the Quiet state when:
• it is reset (power off),
• receiving a Select request. It then goes to the Selected state,

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• receiving a Reset to Ready request. It then goes to the Ready state.

Table 107. Stay Quiet request format

Request SOF Request flags Stay Quiet UID CRC16 Request EOF

- 8 bits 02h 64 bits 16 bits -

The Stay Quiet command must always be executed in Addressed mode (Select_flag is reset to 0 and
Address_flag is set to 1).

Figure 40. Stay Quiet frame exchange between VCD and ST25DVxxKC

Stay Quiet
VCD SOF EOF
request

ST25DVxxKC

7.6.6 Read Single Block

On receiving the Read Single Block command, the ST25DVxxKC reads the requested block and sends back its
32-bit value in the response. The Option_flag is supported, when set response include the Block Security Status.
The Inventory_flag must be set to 0.
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 108. Read Single Block request format

Request SOF Request_flags Read Single Block UID (1) Block number CRC16 Request EOF

- 8 bits 20h 64 bits 8 bits 16 bits -

1. This the field is optional.

Request parameters:
• Request flags
• UID (optional)
• Block number

Table 109. Read Single Block response format when Error_flag is NOT set

Response SOF Response_flags Block security status (1) Data CRC16 Response EOF

- 8 bits 8 bits 32 bits 16 bits -

1. This field is optional.

Response parameters:
• Block security status if Option_flag is set (see Table 110. Block security status
• Four bytes of block data

Table 110. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use. 0: Current block not locked

All at 0. 1: Current block locked

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Table 111. Read Single Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 03h: command option not supported
– 0Fh: error with no information
– 10h: the specified block is not available
– 15h: the specified block is read-protected

Figure 41. Read Single Block frame exchange between VCD and ST25DVxxKC

Read Single Block

VCD SOF EOF
request

Read Single Block

ST25DVxxKC t1 SOF EOF
response

7.6.7 Extended Read Single Block

On receiving the Extended Read Single Block command, the ST25DVxxKC reads the requested block and sends
back its 32-bit value in the response.
When the Option_flag is set, the response includes the Block Security Status.
Block number is coded on 2 Bytes so all memory blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 112. Extended Read Single Block request format

Request SOF Request_flags Extended Read Single Block UID (1) Block number CRC16 Request EOF

- 8 bits 30h 64 bits 16 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flags
• UID (optional)
• Block number (from LSB byte to MSB byte)

Table 113. Extended Read Single Block response format when Error_flag is NOT set

Response SOF Response_flags Block security status (1) Data CRC16 Response EOF

- 8 bits 8 bits 32 bits 16 bits -

1. This field is optional.

Response parameters:
• Block security status if Option_flag is set (see Table 114)
• Four bytes of block data

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Table 114. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use. 0: Current block not locked

All at 0. 1: Current block locked

Table 115. Extended Read Single Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 03h: command option not supported or no response
– 0Fh: error with no information
– 10h: the specified block is not available
– 15h: the specified block is read-protected

Figure 42. Extended Read Single Block frame exchange between VCD and ST25DVxxKC

Extended Read
VCD SOF Single Block EOF
request

Extended Read
ST25DVxxKC t1 SOF Single Block EOF
response

7.6.8 Write Single Block

On receiving the Write Single Block command, the ST25DVxxKC writes the data contained in the request to the
targeted block and reports whether the write operation was successful in the response. When the Option_flag is
set, wait for EOF to respond. The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not program correctly the data into the memory. The Wt time is equal to t1nom + N × 302
µs (N is an integer).
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 116. Write Single Block request format

Request SOF Request_flags Write Single Block UID (1) Block number Data CRC16 Request EOF

- 8 bits 21h 64 bits 8 bits 32 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flags
• UID (optional)
• Block number
• Data

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Table 117. Write Single Block response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the writing cycle.

Table 118. Write Single Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 12h: the specified block is locked or protected and its contents cannot be changed
– 13h: the specified block was not successfully programmed
Note: For more details, see Figure 9. Memory organization.

Figure 43. Write Single Block frame exchange between VCD and ST25DVxxKC

Write Single
VCD SOF EOF
Block request

Write Single Write sequence

ST25DVxxKC t1 SOF EOF
Block response when error

Write Single
ST25DVxxKC Wt SOF EOF
Block response

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7.6.9 Extended Write Single Block

On receiving the Extended Write Single command, the ST25DVxxKC writes the data contained in the request to
the targeted block and reports whether the write operation was successful in the response. When the Option_flag
is set, wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not program correctly the data into the memory. The Wt time is equal to t1nom + N × 302
µs (N is an integer).
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 119. Extended Write Single request format

Request SOF Request_flags Extended Write Single Block UID (1) Block number Data CRC16 Request EOF

- 8 bits 31h 64 bits 16 bits 32 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flags
• UID (optional)
• Block number (from LSB byte to MSB byte)
• Data (from LSB byte to MSB byte)

Table 120. Extended Write Single response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the writing cycle.

Table 121. Extended Write Single response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 12h: the specified block is locked and its contents cannot be changed
– 13h: the specified block was not successfully programmed

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Figure 44. Extended Write Single frame exchange between VCD and ST25DVxxKC

Extended Write
VCD SOF EOF
Single request

Extended Write Write sequence

ST25DVxxKC t1 SOF EOF
Single response when error

Extended Write
ST25DVxxKC Wt SOF EOF
Single response

7.6.10 Lock Block

On receiving the Lock block request, the ST25DVxxKC locks the single block value permanently and protects its
content against new writing.
This command is only applicable for the blocks 0 and 1 which may include a CC file.
For a global protection of a area, update accordingly the RFAiSS bits in the system area. The Option_flag is
supported, when set wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not lock correctly the single block value in memory. The Wt time is equal to t1nom + N ×
302 µs (N is an integer).

Table 122. Lock block request format

Request SOF Request_flags Lock block UID (1) block number CR7C16 Request EOF

- 8 bits 22h 64 bits 8 bits 16 bits -

1. This field is optional.

Request parameter:
• Request Flags
• UID (optional)
• Only block numbers 0 and 1 are allowed to protect the CCFile in case of NDEF (from LSB byte to MSB
byte)

Table 123. Lock block response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter

Table 124. Lock block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

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Response parameter:
• Error code as Error_flag is set
– 03h: command option not supported
– 10h: block not available
– 11h: the specified block is already locked and thus cannot be locked again
– 14h: the specified block was not successfully locked

Figure 45. Lock Block frame exchange between VCD and ST25DVxxKC

Lock Block
VCD SOF EOF
request

Lock Block Lock sequence

ST25DVxxKC t1 SOF EOF
response when error

Lock Block
ST25DVxxKC Wt SOF EOF
response

7.6.11 Extended Lock block

On receiving the extended Lock block request, the ST25DVxxKC locks the single block value permanently and
protects its content against new writing.
This command is only applicable for the blocks 0 and 1 which may include a CC file.
For a global protection of a area, update accordingly the AiSS bits in the system area. When the Option_flag is
set, wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not lock correctly the single block value in memory. The Wt time is equal to t1nom + N ×
302 µs (N is an integer).

Table 125. Extended Lock block request format

Request SOF Request_flags Extended Lock block UID (1) block number CRC16 Request EOF

- 8 bits 32h 64 bits 16 bits 16 bits -

1. The field is optional.

Request parameter:
• Request Flags
• UID (optional)
• Only block numbers 0 and 1 are allowed to protect the CCFile in case of NDEF (from LSB byte to MSB
byte)

Table 126. Extended Lock block response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

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Response parameter:
• No parameter

Table 127. Extended Lock block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 03h: command option not supported
– 10h: block not available
– 11h: the specified block is already locked and thus cannot be locked again
– 14h: the specified block was not successfully locked

Figure 46. Extended Lock block frame exchange between VCD and ST25DVxxKC

Extended
VCD SOF Lock block EOF
request

Extended
Lock sequence
ST25DVxxKC t1 SOF Lock block EOF
when error
response

Extended
ST25DVxxKC Wt SOF Lock block EOF
response

7.6.12 Read Multiple Blocks

When receiving the Read Multiple Block command, the ST25DVxxKC reads the selected blocks and sends back
their value in multiples of 32 bits in the response. The blocks are numbered from 00h to FFh in the request and
the value is minus one (–1) in the field. For example, if the “Number of blocks” field contains the value 06h, seven
blocks are read. The maximum number of blocks is fixed at 256. Read Multiple Blocks command can cross areas
borders, and returns all blocks until reaching a non readable block (block read protected or out of memory). When
the Option_flag is set, the response returns the Block Security Status.
The Inventory_flag must be set to 0.
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 128. Read Multiple Block request format

Read Multiple First block

Request SOF Request_flags UID (1) Number of blocks CRC16 Request EOF
Block number

- 8 bits 23h 64 bits 8 bits 8 bits 16 bits -

1. The field is optional.

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Request parameters:
• Request flags
• UID (optional)
• First block number
• Number of blocks

Table 129. Read Multiple Block response format when Error_flag is NOT set

Response_ Block security

Response SOF Data CRC16 Response EOF
flags status (1)

- 8 bits 8 bits (2) 32 bits(2) 16 bits -

1. The field is optional.

2. Repeated as needed.

Response parameters:
• Block security status if Option_flag is set (see Table 130. Block security status
• N blocks of data

Table 130. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use. 0: Current block not locked

All at 0. 1: Current block locked

Table 131. Read Multiple Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: command option is not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 15h: the specified block is read-protected

Figure 47. Read Multiple Block frame exchange between VCD and ST25DVxxKC

Read Multiple
VCD SOF EOF
Block request

Read Multiple
ST25DVxxKC t1 SOF EOF
Block response

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7.6.13 Extended Read Multiple Blocks

When receiving the Extended Read multiple block command, the ST25DVxxKC reads the selected blocks and
sends back their value in multiples of 32 bits in the response. The blocks are numbered from 00h to last block of
memory in the request and the value is minus one (-1) in the field. For example, if the “Number of blocks” field
contains the value 06h, seven blocks are read. The maximum number of blocks is fixed at 2047. Extended Read
Multiple Blocks command can cross areas borders, and returns all blocks until reaching a non readable block
(block read protected or out of memory). When the Option_flag is set, the response returns the Block Security
Status.
The Inventory_flag must be set to 0.
Block number is coded on 2 Bytes so all memory blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 132. Extended Read Multiple Block request format

Extended
Request Read First block Number of Request
Request_flags UID (1) CRC16
SOF Multiple number blocks EOF
Block

- 8 bits 33h 64 bits 16 bits 16 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flags
• UID (optional)
• First block number (from LSB byte to MSB byte)
• Number of blocks (from LSB byte to MSB byte)

Table 133. Extended Read Multiple Block response format when Error_flag is NOT set

Block security
Response SOF Response_flags Data CRC16 Response EOF
status (1)

- 8 bits 8 bits (2) 32 bits (2) 16 bits -

1. This field is optional.

2. Repeated as needed.

Response parameters:
• Block security status if Option_flag is set (see Table 130)
• N blocks of data

Table 134. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use. 0: Current block not locked

All at 0 1: Current block locked

Table 135. Extended Read Multiple Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

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Response parameter:
• Error code as Error_flag is set:
– 03h: command option is not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 15h: the specified block is read-protected

Figure 48. Extended Read Multiple Block frame exchange between VCD and ST25DVxxKC

Extended
VCD SOF Read Multiple EOF
Block request

Extended
ST25DVxxKC t1 SOF Read Multiple EOF
Block response

7.6.14 Write Multiple Blocks

On receiving the Write Multiple Block command, the ST25DVxxKC writes the data contained in the request to
the requested blocks, and reports whether the write operation were successful in the response. ST25DVxxKC
supports up to 4 blocks, data field must be coherent with the number of blocks to program.
The number of blocks in the request is one less than the number of blocks that the ST25DVxxKC shall write (for
instance Number of block = 2 means 3 blocks to be written).
If some blocks overlaps areas, or overlap end of user memory, the ST25DVxxKC returns an error code and
none of the blocks are programmed. When the Option_flag is set, wait for EOF to respond. During the RF write
cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the ST25DVxxKC may not program
correctly the data into the memory. The Wt time is equal to t1nom + m × 302 μs < 20 ms. (m is an integer, it is
function of Nb number of blocks to be programmed).
The Inventory_flag must be set to 0.
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 136. Write Multiple Block request format

Write
Request First Block Number of Request
Request_flags Multiple UID (1) Data CRC16
SOF number block (2) EOF
Block

Block length
- 8 bits 24h 64 bits 8 bits 8 bits (3) 16 bits -

1. This field is optional.

2. The number of blocks in the request is one less than the number of blocks that the VICC shall write.
3. Repeated as needed

Request parameters:
• Request flags
• UID (optional)
• First Block number
• Number of blocks
• Data

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Table 137. Write Multiple Block response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the writing cycle.

Table 138. Write Multiple Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: command option is not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 12h: the specified block is locked and its contents cannot be changed
– 13h: the specified block was not successfully programmed

Figure 49. Write Multiple Block frame exchange between VCD and ST25DVxxKC

Write Multiple
VCD SOF EOF
block request

Write Multiple Write sequence

ST25DVxxKC t1 SOF EOF
block response when error

Write Multiple
ST25DVxxKC Wt SOF EOF
block response

7.6.15 Extended Write Multiple Blocks

On receiving the Extended Write multiple block command, the writes the data contained in the request to the
targeted blocks and reports whether the write operation were successful in the response. ST25DVxxKC supports
up to 4 blocks, data field must be coherent with number of blocks to program.
If some blocks overlaps areas, or overlap end of user memory the ST25DVxxKC returns an error code and none
of the blocks are programmed.
The number of blocks in the request is one less than the number of blocks that the ST25DVxxKC shall write (for
instance Number of block = 2 means 3 blocks to be written).
When the Option_flag is set, wait for EOF to respond. During the RF write cycle Wt, there should be no
modulation (neither 100% nor 10%), otherwise the ST25DVxxKC may not program correctly the data into the
memory. The Wt time is equal to t1nom + m × 302 μs < 20 ms (m is an integer function of Nb number of blocks to
be programmed).
The inventory_flag must be set to 0.
Block number is coded on 2 Bytes so all memory blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

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Table 139. Extended Write Multiple Block request format

Extended
Request First Block Number of Request
Request_flags Write multiple UID (1) Data CRC16
SOF number block (2) EOF
block

Block
- 8 bits 34h 64 bits 16 bits 16 bits 16 bits -
length (3)

1. This field is optional.

2. The number of blocks in the request is one less than the number of blocks that the VICC shall write.
3. Repeated as needed

Request parameters:
• Request flags
• UID (optional)
• First block number (from LSB byte to MSB byte)
• Number of block (from LSB byte to MSB byte)
• Data (from first to last blocks, from LSB bytes to MSB bytes)

Table 140. Extended Write Multiple Block response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the writing cycle.

Table 141. Extended Write Multiple Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: command option is not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 12h: the specified block is locked and its contents cannot be changed
– 13h: the specified block was not successfully programmed

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Figure 50. Extended Write Multiple Block frame exchange between VCD and

Extended Write
VCD SOF Multiple Block EOF
request

Extended Write
Write sequence
ST25DVxxKC t1 SOF Multiple Block EOF
when error
response

Extended Write
ST25DVxxKC Wt SOF Multiple Block EOF
response

7.6.16 Select
When receiving the Select command:
• If the UID is equal to its own UID, the ST25DVxxKC enters or stays in the Selected state and sends a
response.
• If the UID does not match its own UID, the selected ST25DVxxKC returns to the Ready state and does not
send a response.
The ST25DVxxKC answers an error code only if the UID is equal to its own UID. If not, no response is generated.
If an error occurs, the ST25DVxxKC remains in its current state.
The Option_flag is not supported, and the Inventory_flag must be set to 0.

Table 142. Select request format

Request SOF Request_flags Select UID CRC16 Request EOF

- 8 bits 25h 64 bits 16 bits -

Request parameter:
• UID

Table 143. Select Block response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter

Table 144. Select response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: the option is not supported
– 0Fh: error with no information given

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Figure 51. Select frame exchange between VCD and ST25DVxxKC

VCD SOF Select request EOF

ST25DVxxKC t1 SOF Select response EOF

7.6.17 Reset to Ready

On receiving a Reset to Ready command, the ST25DVxxKC returns to the Ready state if no error occurs. In the
Addressed mode, the ST25DVxxKC answers an error code only if the UID is equal to its own UID. If not, no
response is generated.
The Option_flag is not supported, and the Inventory_flag must be set to 0.

Table 145. Reset to Ready request format

Request SOF Request_flags Reset to Ready UID (1) CRC16 Request EOF

- 8 bits 26h 64 bits 16 bits -

1. This field is optional.

Request parameter:
• UID (optional)

Table 146. Reset to Ready response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter

Table 147. Reset to ready response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: the option is not supported
– 0Fh: error with no information given

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Figure 52. Reset to Ready frame exchange between VCD and ST25DVxxKC

Reset to Ready
VCD SOF EOF
request

Reset to Ready
ST25DVxxKC t1 SOF EOF
response

7.6.18 Write AFI

On receiving the Write AFI request, the ST25DVxxKC programs the 8-bit AFI value to its memory. When the
Option_flag is set, wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not write correctly the AFI value into the memory. The Wt time is equal to t1nom + N ×
302 µs (N is an integer).

Table 148. Write AFI request format

Request SOF Request_flags Write AFI UID (1) AFI CRC16 Request EOF

- 8 bits 27h 64 bits 8 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)
• AFI

Table 149. Write AFI response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter

Table 150. Write AFI response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 03h: command option is not supported
– 0Fh: error with no information given
– 12h: the specified block is locked and its contents cannot be changed
– 13h: the specified block was not successfully programmed

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RF commands

Figure 53. Write AFI frame exchange between VCD and ST25DVxxKC

Write AFI
VCD SOF EOF
request

Write AFI Write sequence

ST25DVxxKC t1 SOF EOF
response when error

Write AFI
ST25DVxxKC Wt SOF EOF
response

7.6.19 Lock AFI

On receiving the Lock AFI request, the ST25DVxxKC locks the AFI value permanently. When the Option_flag is
set, wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not lock correctly the AFI value in memory. The Wt time is equal to t1nom + N × 302 µs
(N is an integer).

Table 151. Lock AFI request format

Request SOF Request_flags Lock AFI UID (1) CRC16 Request EOF

- 8 bits 28h 64 bits 16 bits -

1. This field is optional.

Request parameter:
• Request Flags
• UID (optional)

Table 152. Lock AFI response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter

Table 153. Lock AFI response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

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Response parameter:
• Error code as Error_flag is set
– 03h: command option is not supported
– 0Fh: error with no information given
– 11h: the specified block is already locked and thus cannot be locked again
– 14h: the specified block was not successfully locked

Figure 54. Lock AFI frame exchange between VCD and ST25DVxxKC

Lock AFI
VCD SOF EOF
request

Lock AFI Lock sequence

ST25DVxxKC t1 SOF EOF
response when error

Lock AFI
ST25DVxxKC Wt SOF EOF
response

7.6.20 Write DSFID

On receiving the Write DSFID request, the ST25DVxxKC programs the 8-bit DSFID value to its memory. When
the Option_flag is set, wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not write correctly the DSFID value in memory. The Wt time is equal to t1nom + N × 302
µs (N is an integer).

Table 154. Write DSFID request format

Request SOF Request_flags Write DSFID UID (1) DSFID CRC16 Request EOF

- 8 bits 29h 64 bits 8 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)
• DSFID

Table 155. Write DSFID response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter

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Table 156. Write DSFID response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 03h: command option is not supported
– 0Fh: error with no information given
– 12h: the specified block is locked and its contents cannot be changed
– 13h: the specified block was not successfully programmed

Figure 55. Write DSFID frame exchange between VCD and ST25DVxxKC

Write DSFID
VCD SOF EOF
request

Write DSFID Write sequence

ST25DVxxKC t1 SOF EOF
response when error

Write DSFID
ST25DVxxKC Wt SOF EOF
response

7.6.21 Lock DSFID

On receiving the Lock DSFID request, the ST25DVxxKC locks the DSFID value permanently. When the
Option_flag is set, wait for EOF to respond.
The Inventory_flag must be set to 0.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not lock correctly the DSFID value in memory. The Wt time is equal to t1nom + N × 302
µs (N is an integer).

Table 157. Lock DSFID request format

Request SOF Request_flags Lock DSFID UID (1) CRC16 Request EOF

- 8 bits 2Ah 64 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)

Table 158. Lock DSFID response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

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Response parameter:
• No parameter.

Table 159. Lock DSFID response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: command option is not supported
– 0Fh: error with no information given
– 11h: the specified block is already locked and thus cannot be locked again
– 14h: the specified block was not successfully locked

Figure 56. Lock DSFID frame exchange between VCD and ST25DVxxKC

Lock DSFID
VCD SOF EOF
request

Lock DSFID Lock sequence

ST25DVxxKC t1 SOF EOF
response when error

Lock DSFID
ST25DVxxKC Wt SOF EOF
response

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7.6.22 Get System Info

When receiving the Get System Info command, the ST25DVxxKC sends back its information data in the
response.
The Option_flag is not supported. The Inventory_flag must be set to 0. The Get System Info can be issued in both
Addressed and Non Addressed modes.

Table 160. Get System Info request format

Request SOF Request_flags Get System Info UID (1) CRC16 Request EOF

- 8 bits 2Bh 64 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)

Table 161. Get System Info response format Error_flag is NOT set

Response Response Information Mem. Response

Device UID DSFID AFI IC ref. CRC16
SOF flags flags Size EOF

ST25DV16KC
0Bh 64 8 8 NA (1) 51h 16
ST25DV64KC - 00h -
bits bits bits bits
ST25DV04KC 0Fh 037Fh 50h

1. Field not present in this configuration

Response parameters:
• Information flags set to 0Bh/0Fh. DSFID, AFI and IC reference fields are present.
• UID code on 64 bits
• DSFID value
• AFI value
• MemSize: Block size in bytes and memory size in number of blocks (only present for ST25DV04KC
configurations)

Table 162. Memory size

MSB LSB

16 14 13 9 8 1

RFU Block size in byte Number of blocks

0h 03h 7Fh

• ST25DVxxKC IC reference: the 8 bits are significant.

Table 163. Get System Info response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 01h 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: Option not supported
– 0Fh: error with no information given

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RF commands

Figure 57. Get System Info frame exchange between VCD and ST25DVxxKC

Get System info

VCD SOF EOF
request

Get System info

ST25DVxxKC t1 SOF EOF
response

7.6.23 Extended Get System Info

When receiving the Extended Get System Info command, the ST25DVxxKC sends back its information data in the
response.
The Option_flag is not supported. The Inventory_flag must be set to 0. The Extended Get System Info can be
issued in both Addressed and Non-Addressed modes.

Table 164. Extended Get System Info request format

Request SOF Request_flags Extended Get System Info Parameter request field UID (1) CRC16 Request EOF

- 8 bits 3Bh 8 bits (0xx1xxxxb) 64 bits 16 bits -

1. This field is optional.

• Request flags
• Request parameters
• UID (optional)

Table 165. Parameter request list

Bit Flag name Value Description

0 No request of DSFID
b1 DSFID
1 Request of DSFID
0 No request of AFI
b2 AFI
1 Request of AFI

0 No request of data field on VICC memory size

b3 VICC memory size
1 Request of data field on VICC memory size

0 No request of Information on IC reference

b4 IC reference
1 Request of Information on IC reference
b5 MOI 1 Information on MOI always returned in response flag
0 No request of Data field of all supported commands
b6 VICC Command list
1 Request of Data field of all supported commands
0 No request of CSI list
b7 CSI Information
1 Request of CSI list
Extended Get System One byte length of the Extended Get System
b8 0
Info parameter Field Info parameter field

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Table 166. Extended Get System Info response format when Error_flag is NOT set

Response Information Other Field (1) Response

Response_flags UID DSFID (1) (2) AFI (1) (2) CRC16
SOF flags (2) EOF

- 00h 8 bits(1) 64 bits 8 bits 8 bits up to 64 bits (3) 16 bits -

1. See Table 167. Response Information Flag.

2. This field is optional.
3. The number of bytes is function of the selected parameter list.

Response parameters:
• Information flag defining which fields are present
• UID code on 64 bits
• DSFID value (if requested in Parameters request field)
• AFI value (if requested in Parameters request field)
• Other fields:
– VICC Memory size (if requested in Parameters request field)
– ICRef(if requested in Parameters request field)
– VICC Command list (if requested in Parameters request field)

Table 167. Response Information Flag

Bit Meaning if bit is set Comment

0 DSFID field is not present

b1 DSFID
1 DSFID field is present
0 AFI field is not present
b2 AFI
1 AFI field is present
0 Data field on VICC memory size is not present.
b3 VICC memory size
1 Data field on VICC memory size is present.
0 Information on IC reference field is not present.
b4 IC reference
1 Information on IC reference field is present
0 1 byte addressing
b5 MOI
1 2-byte addressing
0 Data field of all supported commands is not present
b6 VICC Command list
1 Data field of all supported commands is present
b7 CSI Information 0 CSI list is not present
b8 Info flag filed 0 One byte length of Info flag field

Table 168. Response other field: ST25DVxxKC VICC memory size

MSB LSB

24 22 21 17 16 01

RFU Block size in byte Number of blocks

007Fh (ST25DV04KC)
0h 03h 01FFh (ST25DV16KC)
07FFh (ST25DV64KC)

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Table 169. Response other field: ST25DVxxKC IC Ref

1 byte

ICRef

50h (ST25DV04KC)
51h (ST25DV16KC)
51h (ST25DV64KC)

Table 170. Response other field: ST25DVxxKC VICC command list

MSB LSB

32 25 24 17 16 09 08 01

Byte 4 Byte3 Byte 2 Byte 1

00h 3Fh 3Fh FFh

Table 171. Response other field: ST25DVxxKC VICC command list Byte 1

Bit Meaning if bit is set Comment

b1 Read single block is supported -

b2 Write single block is supported -
b3 Lock single block is supported -
b4 Read multiple block is supported -
b5 Write multiple block is supported -
b6 Select is supported including Select state
b7 Reset to Ready is supported -
b8 Get multiple block security status is supported -

Table 172. Response other field: ST25DVxxKC VICC command list Byte 2

Bit Meaning if bit is set Comment

b1 Write AFI is supported -

b2 Lock AFI is supported -
b3 Write DSFID is supported -
b4 Lock DSFID is supported -
b5 Get System Information is supported -
b6 Custom commands are supported -
b7 RFU 0 shall be returned
b8 RFU 0 shall be returned

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Table 173. Response other field: ST25DVxxKC VICC command list Byte 3

Bit Meaning if bit is set Comment

b1 Extended read single block is supported -

b2 Extended write single block is supported -
b3 Extended lock single block is supported -
b4 Extended read multiple block is supported -
b5 Extended write multiple block is supported -
b6 Extended Get Multiple Security Status is supported -
b7 RFU 0 shall be returned
b8 RFU 0 shall be returned

Table 174. Response other field: ST25DVxxKC VICC command list Byte 4

Bit Meaning if bit is set Comment

b1 Read Buffer is supported It means Response Buffer is supported.

b2 Select Secure State is supported It means VCD or Mutual authentication are supported.
b3 Final Response always includes crypto result It means that flag b3 is set in the Final response.
b4 AuthComm crypto format is supported -
b5 SecureComm crypto format is supported -
b6 KeyUpdate is supported -
b7 Challenge is supported -
b8 If set to 1, a further byte is transmitted 0 must be returned.

Table 175. Extended Get System Info response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 01h 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: Option not supported
– 0Fh: error with no information given

Figure 58. Extended Get System Info frame exchange between VCD and ST25DVxxKC

Extended Get
VCD SOF System Info EOF
request

Extended Get
ST25DVxxKC t1 SOF System Info EOF
response

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RF commands

7.6.24 Get Multiple Block Security Status

When receiving the Get Multiple Block Security Status command, the sends back its security status for each
address block: 0 when block is writable else 1 when block is locked for writing. The blocks security status are
defined by the area security status (and by LCK_CCFILE register for blocks 0 and 1). The blocks are numbered
from 00h up to the maximum memory block number in the request, and the value is minus one (–1) in the field.
For example, a value of “06”, in the “Number of blocks” field requests, returns the security status of seven blocks.
This command does not respond an error if number of blocks overlap areas or overlap the end of the user
memory.
The number of blocks is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be
addressed using this command.
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 176. Get Multiple Block Security Status request format

Get Multiple Block First block Number of

Request SOF Request_flags UID (1) CRC16 Request EOF
Security Status number blocks

- 8 bits 2Ch 64 bits 8 bits 8 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)
• First block number
• Number of blocks

Table 177. Get Multiple Block Security Status response format when Error_flag is NOT set

Response SOF Response_flags Block security status CRC16 Response EOF

- 8 bits 8 bits (1) 16 bits -

1. Repeated as needed.

Response parameters:
• Block security status

Table 178. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use 0: Current block not locked

All at 0 1: Current block locked

Table 179. Get Multiple Block Security Status response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: the option is not supported
– 0Fh: error with no information given
– 10h: the specified block is not available

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RF commands

Figure 59. Get Multiple Block Security Status frame exchange between VCD and

Get Multiple Block

VCD SOF Security request EOF
status

Get Multiple Block

ST25DVxxKC t1 SOF Security response EOF
status

7.6.25 Extended Get Multiple Block Security Status

When receiving the Extended Get Multiple Block Security Status command, the ST25DVxxKC sends back the
security status for each address block: 0 when the block is writable else 1 when block is locked for writing. The
block security statuses are defined by the area security status. The blocks are numbered from 00h up to the
maximum memory block number in the request, and the value is minus one (–1) in the field. For example, a value
of '06' in the “Number of blocks” field requests to return the security status of seven blocks.
This command does not respond an error if number of blocks overlap areas or overlap the end of the user
memory.
The number of blocks is coded on 2 Bytes so all memory blocks of ST25DV16KC and ST25DV64KC can be
addressed using this command.
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 180. Extended Get Multiple Block Security Status request format

Extended
Get Multiple
Request First block Number of Request
Request_flags Block UID(1) CRC16
SOF number blocks EOF
Security
Status

- 8 bits 3Ch 64 bits 16 bits 16 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)
• First block number (from LSB byte to MSB byte)
• Number of blocks (from LSB byte to MSB byte)

Table 181. Extended Get Multiple Block Security Status response format when Error_flags NOT set

Response SOF Response_flags Block security status CRC16 Response EOF

- 8 bits 8 bits (1) 16 bits -

1. Repeated as needed.

Response parameters:
• Block security status

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Table 182. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use 0: Current block not locked

All at 0 1: Current block locked

Table 183. Extended Get Multiple Block Security Status response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 03h: the option is not supported
– 0Fh: error with no information given
– 10h: the specified block is not available

Figure 60. Extended Get Multiple Block Security Status frame exchange between VCD and ST25DVxxKC

Extended Get
Multiple Block
VCD SOF EOF
Security request
status

Extended Get
Multiple Block
ST25DVxxKC t1 SOF EOF
Security response
status

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RF commands

7.6.26 Read Configuration

On receiving the Read Configuration command, the ST25DVxxKC reads the static system configuration register
at the Pointer address and sends back its 8-bit value in the response.
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 184. Read Configuration request format

Request SOF Request_flags Read Configuration IC Mfg code UID (1) Pointer CRC16 Request EOF

- 8 bits A0h 02h 64 bits 8 bits 16 bits -

1. This field is optional.

Note: Refer to Table 13. System configuration memory map for details on register addresses.
Request parameters:
• System configuration register pointer
• UID (optional)

Table 185. Read Configuration response format when Error_flag is NOT set

Response SOF Response_flags Register value CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameters:
• One byte of data: system configuration register

Table 186. Read Configuration response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set
– 02h: command not recognized
– 03h: the option is not supported
– 10h: block not available
– 0Fh: error with no information given

Figure 61. Read Configuration frame exchange between VCD and ST25DVxxKC

Read
VCD SOF Configuration EOF
request

Read
ST25DVxxKC t1 SOF Configuration EOF
response

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RF commands

7.6.27 Write Configuration

The Write Configuration command is used to write static system configuration register. The Write Configuration
must be preceded by a valid presentation of the RF configuration password (00) to open the RF configuration
security session.
On receiving the Write Configuration command, the ST25DVxxKC writes the data contained in the request to the
system configuration register at the Pointer address and reports whether the write operation was successful in the
response or not.
When the Option_flag is set, wait for EOF to respond. The Inventory_flag is not supported.
During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the
ST25DVxxKC may not program correctly the data into the Configuration byte. The Wt time is equal to t1nom
+ N × 302 µs (N is an integer).

Table 187. Write Configuration request format

Request Write IC Mfg Register Request

Request_flags UID (1) Pointer CRC16
SOF Configuration code value(2) EOF

- 8 bits A1h 02h 64 bits 8 bits 8 bits 16 bits -

1. This field is optional.

2. Before updating the register value, check the meaning of each bit in previous sections.

Request parameters:
• Request flags
• Register pointer
• Register value
• UID (optional)

Table 188. Write Configuration response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Note: Refer to Table 13. System configuration memory map for details on register addresses.
Response parameter:
• No parameter. The response is sent back after the writing cycle.

Table 189. Write configuration response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option is not supported
– 0Fh: error with no information given
– 10h: block not available
– 12h: block already locked, content can't change
– 13h: the specified block was not successfully programmed

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RF commands

Figure 62. Write Configuration exchange between VCD and ST25DVxxKC

Write
VCD SOF Configuration EOF
request

Write
Write Configuration
ST25DVxxKC t1 SOF Configuration EOF
sequence when error
response

Write
ST25DVxxKC Wt SOF Configuration EOF
response

7.6.28 Read Dynamic Configuration

On receiving the Read Dynamic Configuration command, the ST25DVxxKC reads the Dynamic register address
indicated by the pointer and sends back its 8-bit value in the response.
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 190. Read Dynamic Configuration request format

Read Dynamic
Request SOF Request_flags IC Mfg code UID (1) Pointer address CRC16 Request EOF
Configuration

- 8 bits ADh 02h 64 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• UID (optional)

Table 191. Read Dynamic Configuration response format when Error_flag is NOT set

Response SOF Response_flags Data CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameters:
• One byte of data
Note: Refer to Table 13. System configuration memory mapfor details on register addresses.

Table 192. Read Dynamic Configuration response format when Error_flag is set

Response SOF Response_flags error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error given with no information
– 10h: block not available

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Figure 63. Read Dynamic Configuration frame exchange between VCD and ST25DVxxKC

Read Dynamic
VCD SOF Configuration EOF
request

Read Dynamic
ST25DVxxKC t1 SOF Configuration EOF
response

7.6.29 Write Dynamic Configuration

On receiving the Write Dynamic Configuration command, the ST25DVxxKC updates the Dynamic register
addressed by the pointer.
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 193. Write Dynamic Configuration request format

Request Write Dynamic IC Mfg Pointer Register Request

Request_flags UID (1) CRC16
SOF Configuration code address value EOF

- 8 bits AEh 02h 64 bits 8 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flags
• UID (Optional)
• Pointer address
• Register value

Table 194. Write Dynamic Configuration response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameters:
• No parameter. The response is sent back after t1.

Table 195. Write Dynamic Configuration response format when Error_flag is set

Response SOF Response_flags error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: block not available

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Figure 64. Write Dynamic Configuration frame exchange between VCD and ST25DVxxKC

Write Dynamic
VCD SOF Configuration EOF
request

Write Dynamic Write Dynamic

ST25DVxxKC t1 SOF Configuration EOF Configuration sequence
response when no error

Write Dynamic Write Dynamic

ST25DVxxKC t1 SOF Configuration EOF Configuration sequence
response when error

7.6.30 Manage GPO

On receiving the Manage GPO command. Depending on the command argument, the ST25DVxxKC force the
GPO output level if RF_USER interrupt is enabled, or send a pulse on GPO output if RF_INTERRUPT is enabled.
If neither RF_USER nor RF_INTERRUPT was enabled, the command is not executed and ST25DVxxKC
responds an Error code “0F”.
The IT duration is defined by IT_TIME bits 4 to 2 of GPO2 static register and occurs just after the command
response.
For the 12- pin package ST25DVxxKC version (CMOS GPO output):
• Set means that the GPO pin is driven to a High level (VDCG).
• Reset pulls the GPO pin to a low level (VSS).
• The IT corresponds to a transmission of a positive pulse on the GPO pin.
For the 12-pin package ST25DVxxKC version (open drain GPO output):
• Set means that the GPO pin is driven to a low level (VSS).
• Reset releases the GPO (High impedance). Thanks to an external pull-up, the high level is recovered.
• IT corresponds to the GPO pin driven to ground during the IT duration, then pin is released.
Option_flag is not supported. The Inventory_flag must be set to 0.

Table 196. Manage GPO request format

Request SOF Request_ flags Manage GPO IC Mfg code UID (1) GPO VAL(2) CRC16 Request EOF

- 8 bits A9h 02h 64 bits 8 bits 16 bits -

1. This field is optional.

2. See Table 197. GPOVAL

Table 197. GPOVAL

GPOVAL IT GPO pin output

0xxxxxx0b RF_USER enabled Pin pull to 0

0xxxxxx1b RF_USER enabled Pin released (HZ)
1xxxxxxxb RF_INTERRUPT enabled GPO pin pulled to 0 during IT Time then released (HZ)
Any other conditions GPO released (Hz)

Request parameters:
• Request flag
• UID (optional)
• Data: Define static or dynamic Interrupt

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Table 198. Manage GPO response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the write cycle.

Table 199. ManageGPO response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 13h: the specified block was not successfully programmed (this error is generated if the ManageGPO
GPOVAL value is not in line with the GPO interrupts setting as specified in Table 197. GPOVAL)

Figure 65. Manage GPO frame exchange between VCD and ST25DVxxKC

ManageGPO
VCD SOF EOF
request

ManageGPO
ST25DVxxKC t1 SOF EOF
response

7.6.31 Write Message

On receiving the Write Message command, the ST25DVxxKC puts the data contained in the request into the
Mailbox buffer, update the MB_LEN_Dyn register, and set bit RF_PUT_MSG in MB_CTRL_Dyn register. It then
reports if the write operation was successful in the response. The ST25DVxxKC Mailbox contains up to 256 data
bytes which are filled from the first location '00'. MSGlength parameter of the command is the number of Data
bytes minus - 1 (00 for 1 byte of data, FFh for 256 bytes of data). Write Message could be executed only when
Mailbox is accessible by RF (fast transfer mode is enabled, previous RF message was read or time-out occurs,
no I2C message to be read). User can check it by reading b1 of MB_CTRL_Dyn “HOST_PUT_MSG” which must
be reset to “0”. The Option_flag is not supported. (refer to Section 5.1 Fast transfer mode (FTM)).

Table 200. Write Message request format

Request Request_ Write IC Mfg Message Request

UID (1) MSGLength CRC16
SOF flags Message code Data EOF

(MSGLength + 1)
- 8 bits AAh 02h 64 bits 1 byte 16 bits -
bytes

1. This field is optional.

Request parameters:
• Request flags
• UID (optional)
• Message Length
• Message Data

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Table 201. Write Message response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the write cycle.

Table 202. Write Message response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given

Figure 66. Write Message frame exchange between VCD and ST25DVxxKC

Write Message
VCD SOF EOF
request

Write Message Write sequence

ST25DVxxKC t1 SOF EOF
response when error

Write Message
ST25DVxxKC t1 SOF EOF
response

7.6.32 Read Message Length

On receiving the Read Message Length command, the ST25DVxxKC reads the MB_LEN_Dyn register which
contains the Mailbox message length and sends back its 8-bit value in the response.
The value of MB_LEN_Dyn returned is the (size of the message length in Bytes - 1).
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 203. Read Message Length request format

Request SOF Request_flags Read Message Length IC Mfg code UID (1) CRC16 Request EOF

- 8 bits ABh 02h 64 bits 16 bits -

1. The field is optional.

Request parameters:
• UID (Optional)

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Table 204. Read Message Length response format when Error_flag is NOT set

Response SOF Response_flags Data CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameters:
• One byte of data: MB_LEN_Dyn register value

Table 205. Read Message Length response format when Error_flag is set

Response SOF Response_flags error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error given with no information

Figure 67. Read Message Length frame exchange between VCD and ST25DVxxKC

Read Message
VCD SOF EOF
Length request

Read Message
ST25DVxxKC t1 SOF EOF
Length response

7.6.33 Read Message

On receiving the Read Message command, the ST25DVxxKC reads up to 256 byte in the Mailbox from the
location specified by MBpointer and sends back their value in the response. First MailBox location is '00’. When
Number of bytes is set to 00h and MBPointer is equals to 00h, the MB_LEN bytes of the full message are
returned. Otherwise, Read Message command returns (Number of Bytes + 1) bytes (i.e. 01h returns 2 bytes, FFh
returns 256 bytes).
An error is reported if (Pointer + Nb of bytes + 1) is greater than the message length. RF Reading of the last byte
of the mailbox message automatically clears b1 of MB_CTRL_Dyn “HOST_PUT_MSG”, and allows RF to put a
new message.
The Option_flag is not supported. The Inventory_flag must be set to 0.

Table 206. Read Message request format

Request Read IC Mfg Number of Request

Request_flags UID (1) MBpointer CRC16
SOF Message code Bytes EOF

- 8 bits ACh 02h 64 bits 8 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flag
• UID (Optional)

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• Pointer (start at 00h)

• Number of bytes is one less then the requested data

Table 207. Read Message response format when Error_flag is NOT set

Response SOF Response_flags Mailbox content CRC16 Response EOF

- 8 bits (Number of bytes + 1) bytes (1) 16 bits -

1. Number of message Bytes when Number of Bytes is set to 00h.

Response parameters:
• (number of data + 1 ) data bytes
Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given

Figure 68. Read Message frame exchange between VCD and ST25DVxxKC

Read Message
VCD SOF EOF
request

Read Message
ST25DVxxKC t1 SOF EOF
response

7.6.34 Fast Read Message

On receiving the Fast Read Message command, the ST25DVxxKC reads up to 256 byte in the Mailbox from
the location specified by MBpointer and sends back their value in the response. First MailBox location is '00’.
When Number of bytes is set to 00h and MBPointer is equals to 00h, the MB_LEN bytes of the full message are
returned. Otherwise, Fast Read Message command returns (Number of Bytes + 1) bytes (i.e. 01h returns 2 bytes,
FFh returns 256 bytes).
An error is reported if (Pointer + Nb of bytes + 1) is greater than the message length..
RF Reading of the last byte of mailbox message automatically clears b1 of MB_CTRL_Dyn “HOST_PUT_MSG”
and allows RF to put a new message.
The data rate of the response is multiplied by 2 compated to Read Message.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code. The Option_flag
is not supported, and the Inventory_flag must be set to 0.

Table 208. Fast Read Message request format

Request Fast Read IC Mfg Number of Request

Request_flags UID(1) MBpointer CRC16
SOF Message code Bytes EOF

- 8 bits CCh 02h 64 bits 8 bits 8 bits 16 bits -

1. This field is optional

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Request parameters:
• Request flag
• UID (Optional)
• Pointer (start at 00h)
• Number of bytes is one less than the requested data

Table 209. Fast Read Message response format when Error_flag is NOT set

Response SOF Response_flags Mailbox content CRC16 Response EOF

- 8 bits (Number of bytes + 1) bytes(1) 16 bits 64 bits

1. Number of message Bytes when Number of Bytes is set to 00h

Response parameters:
• (number of bytes + 1) data bytes
Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given

Figure 69. Fast Read Message frame exchange between VCD and ST25DVxxKC

Fast Read
VCD SOF EOF
Message request

Fast Read
ST25DVxxKC t1 SOF EOF
Message response

7.6.35 Write Password

On receiving the Write Password command, the ST25DVxxKC uses the data contained in the request to write
the password and reports whether the operation was successful in the response. It is possible to modify a
Password value only after issuing a valid Present password command (of the same password number). When
the Option_flag is set, wait for EOF to respond. Refer to Section 5.6 Data protection for details on password
Management. The Inventory_flag must be set to 0.
During the RF write cycle time, Wt, there must be no modulation at all (neither 100% nor 10%), otherwise the
ST25DVxxKC may not correctly program the data into the memory.
The Wt time is equal to t1nom + N × 302 µs (N is an integer). After a successful write, the new value of the
selected password is automatically activated. It is not required to present the new password value until the
ST25DVxxKC power-down.
Caution: If ST25DVxxKC is powered through VCC, removing VCC during Write Password command can abort the
command. As a consequence, before writing a new password, RF user should check if VCC is ON, by reading
EH_CTRL_Dyn register bit 3 (VCC_ON), and eventually ask host to maintain or to shut down VCC, during the
Write Password command in order to avoid password corruption.
To make the application more robust, it is recommended to use addressed or selected mode during write
password operations to get the traceability of which tags/UID have been programmed

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Table 210. Write Password request format

Request Write Password Request

Request_flags IC Mfg code UID (1) Data CRC16
SOF password number EOF

- 8 bits B1h 02h 64 bits 8 bits 64 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)
• Password number:
– 00h = RF configuration password RF_PWD_0,
– 01h = RF_PWD_1,
– 02h = RF_PWD_2,
– 03h = RF_PWD_3,
– other = Error
• Data

Table 211. Write Password response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• no parameter.

Table 212. Write Password response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 10h: the password number is incorrect
– 12h: update right not granted, Present Password command not previously executed successfully
– 13h: the specified block was not successfully programmed

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RF commands

Figure 70. Write Password frame exchange between VCD and ST25DVxxKC

Write
VCD SOF Password EOF
request

Write
Write sequence
ST25DVxxKC t1 SOF Password EOF
when error
response

Write
ST25DVxxKC Wt SOF Password EOF
response

7.6.36 Present Password

On receiving the Present Password command, the ST25DVxxKC compares the requested password with the
data contained in the request and reports if the operation has been successful in the response. Refer to
Section 5.6 Data protection for details on password Management. After a successful command, the security
session associate to the password is open as described in Section 5.6 Data protection.
The Option_flag is not supported, and the Inventory_flag must be set to 0.

Table 213. Present Password request format

Request Present IC Mfg Password Request

Request_flags UID (1) Password CRC16
SOF Password code number EOF

- 8 bits B3h 02h 64 bits 8 bits 64 bits 16 bits -

1. This field is optional.

Request parameter:
• Request flags
• UID (optional)
• Password Number:
– 00h = RF configuration password RF_PWD_0
– 01h = RF_PWD_1
– 02h = RF_PWD_2
– 03h = RF_PWD_3
– other = Error
• Password

Table 214. Present Password response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameter:
• No parameter. The response is sent back after the write cycle.

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Table 215. Present Password response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: the present password is incorrect
– 10h: the password number is incorrect

Figure 71. Present Password frame exchange between VCD and ST25DVxxKC

Present
VCD SOF Password EOF
request

Present
ST25DVxxKC t1 SOF Password EOF
response

7.6.37 Fast Read Single Block

On receiving the Fast Read Single Block command, the ST25DVxxKC reads the requested block and sends back
its 32-bit value in the response. When the Option_flag is set, the response includes the Block Security Status. The
data rate of the response is multiplied by 2.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.
The Inventory_flag must be set to 0.
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 216. Fast Read Single Block request format

Request SOF Request_flags Fast Read Single Block IC Mfg code UID (1) Block number CRC16 Request EOF

- 8 bits C0h 02h 64 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flags
• UID (optional)
• Block number

Table 217. Fast Read Single Block response format when Error_flag is NOT set

Response SOF Response_flags Block security status (1) Data CRC16 Response EOF

- 8 bits 8 bits 32 bits 16 bits -

1. This field is optional.

Response parameters:

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• Block security status if Option_flag is set (see Table 218)

• Four bytes of block data

Table 218. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use 0: Current Block not locked

All at 0 1: Current Block locked

Table 219. Fast Read Single Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 15h: the specified block is read-protected

Figure 72. Fast Read Single Block frame exchange between VCD and ST25DVxxKC

Fast Read
VCD SOF Single Block EOF
request

Fast Read
ST25DVxxKC t1 SOF Single Block EOF
response

7.6.38 Fast Extended Read Single Block

On receiving the Fast Extended Read Single Block command, the ST25DVxxKC reads the requested block and
sends back its 32-bit value in the response. When the Option_flag is set, the response includes the Block Security
Status. The data rate of the response is multiplied by 2.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.
The Inventory_flag must be set to 0.
Block number is coded on 2 Bytes so all memory blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command

Table 220. Fast Extended Read Single Block request format

Fast
Request Extended Block Request
Request_flags IC Mfg code UID (1) CRC16
SOF Read Single number EOF
Block

- 8 bits C4h 02h 64 bits 16 bits 16 bits -

1. This field is optional.

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RF commands

Request parameters:
• Request flags
• UID (optional)
• Block number (from LSB byte to MSB byte)

Table 221. Fast Extended Read Single Block response format when Error_flag is NOT set

Response SOF Response_flags Block security status (1) Data CRC16 Response EOF

- 8 bits 8 bits 32 bits 16 bits -

1. This field is optional.

Response parameters:
• Block security status if Option_flag is set (see the table below)
• Four bytes of block data

Table 222. Block security status

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use 0: Current Block not locked

All at 0 1: Current Block locked

Table 223. Fast Extended Read Single Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: the specified block is not available
– 15h: the specified block is read-protected

Figure 73. Fast Extended Read Single Block frame exchange between VCD and ST25DVxxKC

Fast Extended
VCD SOF Read Single Block EOF
request

Fast Extended
ST25DVxxKC t1 SOF Read Single Block EOF
response

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RF commands

7.6.39 Fast Read Multiple Blocks

On receiving the Fast Read Multiple Blocks command, the ST25DVxxKC reads the selected blocks and sends
back their value in multiples of 32 bits in the response. The blocks are numbered from 00h up to the last block of
user memory in the request, and the value is minus one (–1) in the field. For example, if the “Number of blocks”
field contains the value 06h, seven blocks are read. The maximum number of blocks is fixed to 256. Fast Read
Multiple Blocks command can cross areas borders, and returns all blocks until reaching a non readable block
(block read protected or out of memory).
When the Option_flag is set, the response includes the Block Security Status. The data rate of the response is
multiplied by 2.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.
The Inventory_flag must be set to 0.
Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 224. Fast Read Multiple Block request format

Request Fast Read IC Mfg First block Number of Request

Request_flags UID (1) CRC16
SOF Multiple Block code number blocks EOF

- 8 bits C3h 02h 64 bits 8 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flag
• UID (Optional)
• First block number
• Number of blocks

Table 225. Fast Read Multiple Block response format when Error_flag is NOT set

Response SOF Response_flags Block security status (1) Data CRC16 Response EOF

- 8 bits 8 bits (2) 32 bits(2) 16 bits -

1. This field is optional.

2. Repeated as needed.

Response parameters:
• Block security status if Option_flag is set (see Table 226)
• N block of data

Table 226. Block security status if Option_flag is set

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future use 0: Current not locked

All at 0 1: Current locked

Table 227. Fast Read Multiple Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

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Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 0Fh: error with no information given
– 03h: the option is not supported
– 10h: block address not available
– 15h: block read-protected

Figure 74. Fast Read Multiple Block frame exchange between VCD and ST25DVxxKC

Fast Read
VCD SOF Multiple block EOF
request

Fast Read
ST25DVxxKC t1 SOF Multiple block EOF
response

7.6.40 Fast Extended Read Multiple Block

On receiving the Fast Extended Read Multiple Block command, the ST25DVxxKC reads the selected blocks and
sends back their value in multiples of 32 bits in the response. The blocks are numbered from 00h to up to the
last block of memory in the request and the value is minus one (–1) in the field. For example, if the “Number of
blocks” field contains the value 06h, seven blocks are read. The maximum number of blocks is fixed to 2047. Fast
Extended Read Multiple Blocks command can cross areas borders, and returns all blocks until reaching a non
readable block (block read protected or out of memory).
When the Option_flag is set, the response includes the Block Security Status. The data rate of the response is
multiplied by 2.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.
The Inventory_flag must be set to 0.
Block number is coded on 2 Bytes so all memory blocks of ST25DV16KC and ST25DV64KC can be addressed
using this command.

Table 228. Fast Extended Read Multiple Block request format

Fast Extended
Request IC Mfg First block Block Request
Request_flags Read Multiple UID (1) CRC16
SOF code number Number EOF
Block

- 8 bits C5h 02h 64 bits 16 bits 16 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flag
• UID (Optional)
• First block number (from LSB byte to MSB byte)
• Number of blocks (from LSB byte to MSB byte)

Table 229. Fast Extended Read Multiple Block response format when Error_flag is NOT set

Response SOF Response_flags Block security status (1) Data CRC16 Response EOF

- 8 bits 8 bits(2) 32 bits(2) 16 bits -

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1. This field is optional.

2. Repeated as needed

Response parameters:
• Block security status if Option_flag is set (see Table 230)
• N block of data

Table 230. Block security status if Option_flag is set

b7 b6 b5 b4 b3 b2 b1 b0

Reserved for future 0: Current not locked

use All at 0 1: Current locked

Table 231. Fast Read Multiple Block response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: the option is not supported
– 0Fh: error with no information given
– 10h: block address not available
– 15h: block read-protected

Figure 75. Fast Extended Read Multiple Block frame exchange between VCD and ST25DVxxKC

Fast Extended
VCD SOF Read Multiple EOF
Block request

Fast Extended
ST25DVxxKC t1 SOF Read Multiple EOF
Block response

7.6.41 Fast Write Message

On receiving the Fast Write Message command, the ST25DVxxKC puts the data contained in the request into the
mailbox buffer, updates the Message Length register MB_LEN_Dyn, and set Mailbox loaded bit RF_PUT_MSG.
It then reports if the write operation was successful in the response. The ST25DVxxKC mailbox contains up to
256 data bytes which are filled from the first location '00'. MSGlength parameter of the command is the number
of Data bytes minus - 1 (00 for 1 byte of data, FFh for 256 bytes of data). Fast Write Message can be executed
only when Mailbox is accessible by RF (previous RF message was read or time-out occurs, no I2C message to be
read). User can check it by reading b1 of MB_CTRL_Dyn “HOST_PUT_MSG”, which must be reset to “0”. (refer
to Section 5.1 Fast transfer mode (FTM)).
• The data rate of the response is multiplied by 2 compared to Write Message command.
• The Option_flag is not supported.
• The Inventory_flag must be set to 0.
• The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.

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Table 232. Fast Write Message request format

Request Fast Write IC Mfg Request

Request_flags UID (1) MSGLength Message Data CRC16
SOF Message code EOF

(MsgLenght + 1)
- 8 bits CAh 02h 64 bits 1 byte 16 bits -
bytes

1. This field is optional.

Request parameters:
• Request flag
• UID (optional)
• Message Lenght
• Message Data

Table 233. Fast Write Message response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameters:
• No parameter. The response is sent back after the write cycle.

Table 234. Fast Write Message response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given

Figure 76. Fast Write Message frame exchange between VCD and ST25DVxxKC

Fast Write
VCD SOF Message EOF
request

Fast Write
Write sequence
ST25DVxxKC t1 SOF Message EOF
when error
response

Fast Write
Write sequence
ST25DVxxKC t1 SOF Message EOF
when no error
response

DS13519 - Rev 6 page 134/202

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RF commands

7.6.42 Fast Read Message Length

On receiving the Fast Read Message Length command, the ST25DVxxKC reads the MB_LEN_dyn register which
contains the mailbox message length and sends back its 8-bit value in the response.
The value of MB_LEN_Dyn returned is the (size of the message length in Bytes - 1).
The Option_flag is not supported. The Inventory_flag must be set to 0.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.
The data rate of the response is multiplied by 2 compared to Read Message Length command.

Table 235. Fast Read Message Length request format

Request SOF Request_flags Fast Read Message Length IC Mfg code UID (1) CRC16 Request EOF

- 8 bits CBh 02h 64 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flag
• UID (optional)

Table 236. Fast Read Message Length response format when Error_flag is NOT set

Response SOF Response_flags Data CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameters:
• One byte of data: volatile Control register.

Table 237. Fast Read Message Length response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command option not recognized
– 03h: command not supported
– 0Fh: error with no information given

Figure 77. Fast Read Message Length frame exchange between VCD and ST25DVxxKC

Fast Read
VCD SOF Message Length EOF
request

Fast Read
ST25DVxxKC t1 SOF Message Length EOF
response

DS13519 - Rev 6 page 135/202

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RF commands

7.6.43 Fast Read Dynamic Configuration

On receiving the Fast Read Dynamic Configuration command, the ST25DVxxKC reads the Dynamic register
address by the pointer and sends back its 8-bit value in the response.
The Option_flag is not supported. The Inventory_flag must be set to 0.
The subcarrier_flag should be set to 0, otherwise the ST25DVxxKC answers with an error code.
The data rate of the response is multiplied by 2 compared to Read Dynamic configuration command.

Table 238. Fast Read Dynamic Configuration request format

Fast Read Dynamic

Request SOF Request_flags IC Mfg code UID (1) Pointer address CRC16 Request EOF
configuration

- 8 bits CDh 02h 64 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flag
• UID (optional)

Table 239. Fast Read Dynamic Configuration response format when Error_flag is NOT set

Response SOF Response_flags Data CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameters:
• One byte of data

Table 240. Fast Read Dynamic Configuration response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: block not available

Figure 78. Fast Read Dynamic configuration frame exchange between VCD and ST25DVxxKC

Fast Read
VCD SOF Dynamic configuration EOF
request

Fast Read
ST25DVxxKC t1 SOF Dynamic configuration EOF
request

DS13519 - Rev 6 page 136/202

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RF commands

7.6.44 Fast Write Dynamic Configuration

On receiving the Fast Write Dynamic Configuration command, the ST25DVxxKC updates the Dynamic register
addressed by the pointer.
The Option_flag is not supported. The Inventory_flag must be set to 0.
The data rate of the response is multiplied by 2 compared to Write Dynamic Configuration command.

Table 241. Fast Write Dynamic Configuration request format

Fast Write
Request IC Mfg Pointer Register Request
Request_flags Dynamic UID (1) CRC16
SOF code address Value EOF
Configuration

- 8 bits CEh 02h 64 bits 8 bits 8 bits 16 bits -

1. This field is optional.

Request parameters:
• Request flag
• UID (optional)
• Pointer address
• Register value

Table 242. Fast Write Dynamic Configuration response format when Error_flag is NOT set

Response SOF Response_flags CRC16 Response EOF

- 8 bits 16 bits -

Response parameters:
• No parameter. The response is sent back after t1.

Table 243. Fast Write Dynamic Configuration response format when Error_flag is set

Response SOF Response_flags Error code CRC16 Response EOF

- 8 bits 8 bits 16 bits -

Response parameter:
• Error code as Error_flag is set:
– 02h: command not recognized
– 03h: command option not supported
– 0Fh: error with no information given
– 10h: block not available

DS13519 - Rev 6 page 137/202

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RF commands

Figure 79. Fast Write Dynamic Configuration frame exchange between VCD and ST25DVxxKC

Fast Write
VCD SOF Dynamic configuration EOF
request

Fast Write
Write sequence
ST25DVxxKC t1 SOF Dynamic configuration EOF
request when error

Fast Write Write sequence

ST25DVxxKC t1 SOF Dynamic configuration EOF
request
when no error

DS13519 - Rev 6 page 138/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Unique identifier (UID)

8 Unique identifier (UID)

The ST25DVxxKC is uniquely identified by a 64-bit unique identifier (UID). This UID complies with ISO/IEC 15963
and ISO/IEC 7816-6. The UID is a read-only code and comprises:
• eight MSBs with a value of E0h
• the IC manufacturer code “ST 02h” on 8 bits (ISO/IEC 7816-6/AM1)
• a unique serial number on 48 bits

Table 244. UID format

MSB LSB

63 56 55 48 47 40 39 0

0xE0 0x02 ST product code (1) Unique serial number

1. See Table 86. UID for ST product code value definition.

With the UID, each ST25DVxxKC can be addressed uniquely and individually during the anticollision loop and for
one-to-one exchanges between a VCD and an ST25DVxxKC.

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 ST25DV04KC ST25DV16KC ST25DV64KC
Device parameters

9 Device parameters

9.1 Maximum ratings

Stressing the device above the ratings listed in Table 245 may cause permanent damage to the device. These
are stress ratings only, and operation of the device, at these or any other conditions above those indicated in
the operating sections of this specification, is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect the device reliability. Device mission profile (application conditions) is compliant with
JEDEC JESD47 qualification standard. Extended mission profiles can be assessed on demand.
Refer also to the STMicroelectronics SURE program and other relevant quality documents.

Table 245. Absolute maximum ratings

Symbol Parameter Min. Max. Unit

RF and
Range 6 All packages -40 85 °C
I2C interfaces
RF and
TA Ambient operating temperature UFDFPN8, UFDFPN12 - 40 105 °C
I2C interfaces
Range 8
RF interface - 40 105 °C
SO8N, TSSOP
I2C interface - 40 125 °C

TSTG Storage temperature UFDFPN8 (MLP8),SO8N, TSSOP8, UFDFPN12, WLCSP10 - 65 150 °C

TLEAD Lead temperature during soldering see note (1) °C

VIO I2C input or output range - 0.50 6.5 V

VCC I2C supply voltage - 0.50 6.5 V

IOL_MAX_SDA DC output current on pin SDA (when equal to 0) - 5 mA

IOL_MAX_GPO DC output current on pin GPO (when equal to 0) - 1.5 mA

VMAX_1 RF input voltage amplitude peak to peak between AC0 and AC1, VSS pin left floating(2) VAC0 - VAC1 - 11 V

VAC0 - VSS,
VMAX_2 AC voltage between AC0 and VSS, or AC1 and VSS (2) - 0.50 5.5 V
or VAC1 - VSS

VESD Electrostatic discharge voltage (human body model) (3) All pins - 2000 V

1. Compliant with JEDEC Std J-STD-020C (for small body, Sn-Pb or Pb assembly), the ST ECOPACK 7191395 specification, and the
European directive on Restrictions on Hazardous Substances (RoHS) 2002/95/EU.
2. Evaluated by characterization – Not tested in production.
3. AEC-Q100-002 (compliant with JEDEC Std JESD22-A114, C1 = 100 pF, R1 = 1500 Ω, R2 = 500 Ω)

DS13519 - Rev 6 page 140/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C parameters

9.2 I²C parameters

This section summarizes the operating and measurement conditions, and the DC and AC characteristics of
the device in I²C mode. The parameters are derived from tests performed under the measurement conditions
summarized in the relevant tables. Check that the operating conditions in the circuit match the measurement
conditions when relying on the quoted parameters.

Table 246. I²C operating conditions

Symbol Parameter Min. Max. Unit

VCC Supply voltage 1.8 5.5 V

Range 6 All packages -40 85 °C

TA Ambient operating temperature UFDFPN8, UFDFPN12 -40 105 °C
Range 8
SO8N, TSSOP8 -40 125 °C

Table 247. AC test measurement conditions

Symbol Parameter Min. Max. Unit

CL Load capacitance 100 - pF

tr, tf Input rise and fall times - 50 ns

Vhi-lo Input levels 0.2VCC to 0.8VCC V

Vref(t) Input and output timing reference levels 0.3VCC to 0.7VCC V

Figure 80. AC test measurement I/O waveform

Input and Output

Input Levels
Timing Reference Levels

0.8VCC
0.7VCC

0.3VCC
0.2VCC

Table 248. Input parameters

Symbol Parameter Min. Max. Unit

CIN Input capacitance (SDA) - 8 pF

CIN Input capacitance (other pins) - 6 pF

tNS (1) Pulse width ignored (input filter on SCL and SDA) - 80 ns

1. Evaluated by characterization – Not tested in production.

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I²C parameters

Table 249. I²C DC characteristics up to 85 °C

Symbol Parameter Test condition Min. Typ. Max. Unit

Input leakage current VIN = VSS or VCC

- 0.03 0.1 µA
ILI (SCL, SDA) device in Standby mode

Input leakage current (LPD) VIN = VSS device in Standby mode - 0.1 0.5 μA

Output leakage current SDA in high-Z, external voltage

ILO - 0.03 0.1 µA
(SDA) applied on SDA: VSS or VCC

VCC = 1.8 V, fC = 1MHz

- 116 160
(rise/fall time < 50 ns)

Operating supply current (device VCC = 3.3 V, fC = 1MHz

ICC_E2 - 220 240 µA
select E2 address) read (1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1 MHz
- 510 550
(rise/fall time < 50 ns)
VCC = 1.8 V, fC = 1MHz
- 116 160
(rise/fall time < 50 ns)

Operating supply current (device VCC = 3.3 V, fC = 1MHz

ICC_MB - 220 240 µA
select MB address) read(1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1MHz
- 510 550
(rise/fall time < 50 ns)
VCC = 1.8 V, fC = 1MHz
- 110 210
(rise/fall time < 50 ns)

Operating supply current (device VCC = 3.3 V, fC = 1MHz

ICC0 - 110 220 µA
select E2 address) write(1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1MHz
- 130 250
(rise/fall time < 50 ns)
VCC = 1.8 V, fC = 1MHz
- 170 200
(rise/fall time < 50 ns)

Operating supply current (device VCC = 3.3 V, fC = 1MHz

ICC0_MB - 280 300 µA
select MB address) write(1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1MHz
- 520 600
(rise/fall time < 50 ns)
VCC = 1.8 V - 0.84 1.5
ICC1
Low power down supply current VCC = 3.3 V - 1.3 2 μA
(LPD = 1)
VCC = 5.5 V - 1.7 3

VCC = 1.8 V - 72 100

ICC1_PON Static standby supply current after
power ON or device select stop or VCC = 3.3 V - 76 100 µA
(LPD = 0) time out
VCC = 5.5 V - 87 120

VCC = 1.8 V -0.45 - 0.25 VCC

VIL Input low voltage (SDA, SCL) VCC = 3.3 V -0.45 - 0.3 VCC V

VCC = 5.5 V -0.45 - 0.3 VCC

VIL_LPD Input low voltage (LPD) VCC = 3.3 V -0.45 - 0.2 VCC V

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I²C parameters

Symbol Parameter Test condition Min. Typ. Max. Unit

VCC = 1.8 V 0.75 VCC - VCC+ 1

VIH Input high voltage (SDA, SCL) VCC = 3.3 V 0.75 VCC - VCC+ 1 V

VCC = 5.5 V 0.75 VCC - VCC+ 1

VCC = 1.8 V 0.85 VCC - VCC+ 1

VIH_LPD Input high voltage (LPD) VCC = 3.3 V 0.85 VCC - VCC+ 1 V

VCC = 5.5 V 0.85 VCC - VCC+ 1

IOL = 1 mA, VCC = 1.8 V - 0.05 0.4

VOL_SDA Output low voltage SDA (1 MHz) IOL = 2.1 mA, VCC = 3.3 V - 0.075 0.4 V

IOL = 3 mA, VCC = 5.5 V - 0.09 0.4

VCC_Power_up Device select acknowledge fC = 100 kHz(2) - 1.48 1.7 V

1. SCL, SDA connected to Ground or VCC. SDA connected to VCC through a pull-up resistor.
2. Evaluated by characterization – Not tested in production.

Table 250. I²C DC characteristics up to 125 °C

Symbol Parameter Test condition Min. Typ. Max. Unit

Input leakage current VIN = VSS or VCC

- 0.03 0.1
ILI (SCL, SDA) device in Standby mode µA
Input leakage current (LPD) VIN = VSS device in Standby mode - 0.1 0.5

Output leakage current SDA in high-Z, external voltage

ILO - 0.03 0.1 µA
(SDA) applied on SDA: VSS or VCC

VCC = 1.8 V, fC = 1MHz

- 126 180
(rise/fall time < 50 ns)

Operating Supply current (Device VCC = 3.3 V, fC = 1MHz

ICC_E2 - 230 260 µA
select E2 Address) Read (1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1MHz
- 510 550
(rise/fall time < 50 ns)
VCC = 1.8 V, fC = 1MHz
- 126 180
(rise/fall time < 50 ns)

Operating Supply current (Device VCC = 3.3 V, fC = 1MHz

ICC_MB - 230 260 µA
select MB Address) Read(1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1MHz
- 510 550
(rise/fall time < 50 ns)
VCC = 1.8 V, fC = 1MHz
- 120 220
(rise/fall time < 50 ns)

Operating Supply current (Device VCC = 3.3 V, fC = 1MHz

ICC0 - 120 230 µA
select E2 Address) Write(1) (rise/fall time < 50 ns)
VCC = 5.5 V, fC = 1MHz
- 140 260
(rise/fall time < 50 ns)
VCC = 1.8 V, fC = 1MHz
Operating Supply current (Device - 180 220
ICC0_MB µA
select MB Address) Write(1) (rise/fall time < 50 ns)

DS13519 - Rev 6 page 143/202

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I²C parameters

Symbol Parameter Test condition Min. Typ. Max. Unit

VCC = 3.3 V, fC = 1MHz

- 290 320
Operating Supply current (Device (rise/fall time < 50 ns)
ICC0_MB µA
select MB Address) Write(1)
VCC = 5.5 V, fC = 1MHz
- 520 600
(rise/fall time < 50 ns)
VCC = 1.8 V - 2.5 5
ICC1
Low power down supply current VCC = 3.3 V - 3 6 μA
(LPD = 1)
VCC = 5.5 V - 4 7

VCC = 1.8 V - 78 110

ICC1_PON Static Standby supply current after
power ON or device select stop or VCC = 3.3 V - 82 110 µA
(LPD = 0) time out
VCC = 5.5 V - 95 130

VCC = 1.8 V -0.45 - 0.25 VCC

VIL Input low voltage (SDA, SCL) VCC = 3.3 V -0.45 - 0.3 VCC V

VCC = 5.5 V -0.45 - 0.3 VCC

VIL_LPD Input low voltage (LPD) VCC = 3.3 V -0.45 - 0.2 VCC V

VCC = 1.8 V 0.75 VCC - VCC+1

VIH Input high voltage (SDA, SCL) VCC = 3.3 V 0.75 VCC - VCC+1 V

VCC = 5.5 V 0.75 VCC - VCC+1

0.85
VCC = 1.8 V - VCC+1
VCC+1

0.85
VIH_LPD Input high voltage (LPD) VCC = 3.3 V - VCC+1 V
VCC+1

0.85
VCC = 5.5 V - VCC+1
VCC+1

IOL = 1 mA, VCC = 1.8 V - 0.05 0.4

VOL_SDA Output low voltage SDA (1 MHz) IOL = 2.1 mA, VCC = 3.3 V - 0.08 0.4 V

IOL = 3 mA, VCC = 5.5 V - 0.1 0.4

VCC_Power_up Device Select Acknowledge fC = 100 KHz(2) - 1.48 1.7 V

1. SCL, SDA connected to Ground or VCC. SDA connected to VCC through a pull-up resistor.
2. Evaluated by characterization – Not tested in production.

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I²C parameters

Table 251. I²C AC characteristics up to 85 °C

Test conditions specified in Table 246. I²C operating conditions

Symbol Alt. Parameter Min. Max. Unit

fC fSCL Clock frequency 0.05 1000 kHz

tCHCL tHIGH Clock pulse width high(1) 0.26 25000(2) µs

tCLCH tLOW Clock pulse width low(1) 0.5 25000 (3) µs

tSTART_OUT - I²C timeout on Start condition(1) 35 - ms

tXH1XH2 tR Input signal rise time(1) -(4) -(4) ns

tXL1XL2 tF Input signal fall time(1) - (4) -(4) ns

tDL1DL2 tF SDA (out) fall time(1) 20 120 ns

tDXCX tSU:DAT Data in set up time(1) 0 - ns

tCLDX tHD:DAT Data in hold time 0 - ns

tCLQX tDH Data out hold time(5) 100 - ns

tCLQV tAA Clock low to next data valid (access time)(6) - 450 ns

tCHDX tSU:STA Start condition set up time(7) 250 - ns

tDLCL tHD:STA Start condition hold time 0.25 35000(8) µs

tCHDH tSU:STO Stop condition set up time 250 - ns

Time between Stop condition and next Start

tDHDL tBUF 1400 - ns
condition
tW - I²C write time (9) - 5 ms

tbootDC - RF OFF and LPD = 0(1) - 0.6 ms

tbootLPD - RF OFF(1) - 0.6 ms

1. Evaluated by characterization – Not tested in production.

2. tCHCL timeout.
3. tCLCH timeout.
4. There is no min. or max. values for the input signal rise and fall times. It is however recommended by the I2C specification that the input
signal rise and fall times be less than 120 ns when fC < 1 MHz.
5. To avoid spurious Start and Stop conditions, a minimum delay is placed between SCL=1 and the falling or rising edge of SDA.
6. tCLQV is the time (from the falling edge of SCL) required by the SDA bus line to reach 0.8VCC in a compatible way with the I2C specification
(which specifies tSU:DAT (min) = 100 ns), assuming that the Rbus × Cbus time constant is less than 150 ns (as specified in the Figure 82. I²C
Fast mode (fC = 1 MHz): maximum Rbus value versus bus parasitic capacitance (Cbus).
7. For a reStart condition, or following a write cycle.
8. tDLCL timeout
9. I2C write time for 1 Byte, up to 16 Bytes in EEPROM (user memory) provided they are all located in the same memory row, that is the most
significant memory address bits (b16-b4) are the same.

DS13519 - Rev 6 page 145/202

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I²C parameters

Table 252. I²C AC characteristics up to 125 °C

Test conditions specified in Table 246. I²C operating conditions

Symbol Alt. Parameter Min. Max. Unit

fC fSCL Clock frequency 0.05 1000 kHz

tCHCL tHIGH Clock pulse width high 0.26 25000 (1) µs

tCLCH tLOW Clock pulse width low 0.5 25000 (2) µs

tSTART_OUT - I²C timeout on Start condition(3) 35 - ms

tXH1XH2 tR Input signal rise time(3) -(4) -(4) ns

tXL1XL2 tF Input signal fall time(3) - (4) - (4) ns

tDL1DL2 tF SDA (out) fall time(3) 20 120 ns

tDXCX tSU:DAT Data in set up time(3) 0 - ns

tCLDX tHD:DAT Data in hold time 0 - ns

tCLQX tDH Data out hold time(5) 100 - ns

tCLQV tAA Clock low to next data valid (access time)(6) - 450 ns

tCHDX tSU:STA Start condition set up time(7) 250 - ns

tDLCL tHD:STA Start condition hold time 0.25 35000 (8) µs

tCHDH tSU:STO Stop condition set up time 250 - ns

Time between Stop condition and next Start

tDHDL tBUF 1400 - ns
condition
tW - I²C write time (9) - 5.5 ms

tbootDC - RF OFF and LPD = 0(3) - - ms

tboot_LPD - RF OFF(3) - 0.6 ms

1. tCHCL timeout.
2. tCLCH timeout.
3. Evaluated by characterization – Not tested in production.
4. There is no min. or max. values for the input signal rise and fall times. It is however recommended by the I2C specification that the input
signal rise and fall times be less than 120 ns when fC < 1 MHz.
5. To avoid spurious Start and Stop conditions, a minimum delay is placed between SCL=1 and the falling or rising edge of SDA.
6. tCLQV is the time (from the falling edge of SCL) required by the SDA bus line to reach 0.8VCC in a compatible way with the I2C specification
(which specifies tSU:DAT (min) = 100 ns), assuming that the Rbus × Cbus time constant is less than 150 ns (as specified in the Figure 82. I²C
Fast mode (fC = 1 MHz): maximum Rbus value versus bus parasitic capacitance (Cbus) ).
7. For a restart condition, or following a write cycle.
8. tDLCL timeout.
9. I2 write time for 1 Byte, up to 16 Bytes in EEPROM (user memory) provided they are all located in the same memory row, that is the most
significant memory address bits (b16-b4) are the same.

DS13519 - Rev 6 page 146/202

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I²C parameters

Figure 81. I²C AC waveforms

tXL1XL2 tCHCL
tXH1XH2 tCLCH

SCL
tDLCL tXL1XL2

SDA In

tCHDX tXH1XH2 tCLDX SDA tDXCX tCHDH tDHDL

SDA Change
Start Input Stop Start
condition condition condition

SCL

SDA In
tW
tCHDH tCHDX
Stop Write cycle Start
condition condition

tCHCL

SCL
tCLQV tCLQX tDL1DL2

SDA Out Data valid Data valid

MS71328

Figure 82 shows how to calculate the value of the pull-up resistor. In the applications where this method of
synchronization is not employed, the pull-up resistor is unnecessary, provided that the bus master has a push-pull
(rather than open drain) output.

Figure 82. I²C Fast mode (fC = 1 MHz): maximum Rbus value versus bus parasitic capacitance (Cbus)

100 V CC
Bus line pull-up resistor (KW)

R bus
R
bu s × The Rbus x Cbus time constant
C
bu s = must be below 150 ns. SCL
10 150
ns I²C bus ST25DV
The time constant line is master
represented on the left.
SDA
4 Here,
C bus
R bu s × C = 120 ns
bu s

1
10 30 100
Bus line capacitor (pF)

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GPO characteristics

9.3 GPO characteristics

This section summarizes the operating and measurement conditions of the GPO feature. The parameters in the
DC and AC characteristic tables that follow are derived from tests performed under the measurement conditions
summarized in the relevant tables.

Table 253. GPO DC characteristics up to 85 °C

Symbol Parameter Condition Min Typ Max Unit

VDCG = 1.8 V, IOL = 0.5 mA - - 0.4 V

Output low voltage (GPO
VOL_GPO_CMOS VDCG = 3.3 V, IOL = 0.5 mA - - 0.4 V
CMOS)
VDCG = 5.5 V, IOL = 0.5 mA - - 0.4 V

VDCG = 1.8 V, IOL = 0.5 mA VDCG-0.4 - - V

Output high voltage (GPO
VOH_GPO_CMOS VDCG = 3.3 V, IOL = 0.5 mA VDCG-0.4 - - V
CMOS)
VDCG = 5.5 V, IOL = 0.5 mA VDCG-0.4 - - V

IOL = 1 mA, VCC = 1.8 V - 0.28 0.4

Output low voltage (GPO
VOL_GPO_OD IOL = 1 mA, VCC = 3.3 V - 0.2 0.4 V
open drain)
IOL = 1 mA, VCC = 5.5 V - 0.2 0.4

Output leakage current GPO in Hi-Z, external voltage applied on:

IL_GPO_OD -0.15 0.06 0.15 µA
(GPO open drain) GPO, VSS or VCC

ILI_VDCG Input leakage (VDCG) VDCG = 5.5 V - - 0.1 µA

Table 254. GPO DC characteristics up to 125 °C

Symbol Parameter Condition Min Typ Max Unit

VDCG = 1.8 V, IOL = 0.5 mA - - 0.4 V

Output low voltage (GPO
VOL_GPO_CMOS VDCG = 3.3 V, IOL = 0.5 mA - - 0.4 V
CMOS)
VDCG = 5.5 V, IOL = 0.5 mA - - 0.4 V

VDCG = 1.8 V, IOL = 0.5 mA VDCG-0.4 - - V

Output high voltage (GPO
VOH_GPO_CMOS VDCG = 3.3 V, IOL = 0.5 mA VDCG-0.4 - - V
CMOS)
VDCG = 5.5 V, IOL = 0.5 mA VDCG-0.4 - - V

IOL = 1 mA, VCC = 1.8 V - 0.28 0.4

Output low voltage (GPO
VOL_GPO_OD IOL = 1 mA, VCC = 3.3 V - 0.22 0.4 V
open drain)
IOL = 1 mA, VCC = 5.5 V - 0.21 0.4

Output leakage current GPO in Hi-Z, external voltage applied on:

IL_GPO_OD -0.15 0.06 0.15 µA
(GPO open drain) GPO, VSS or VCC

ILI_VDCG Input leakage (VDCG) VDCG = 5.5 V - - 0.1 µA

Table 255. GPO AC characteristics

Symbol Parameter Test condition Min. Max Unit

tr_GPO_CMOS Output rise time(1) CL = 30 pF, VDCG = 1.8 V to 5.5 V - 50 ns

tf_GPO_CMOS Output fall time(1) CL = 30 pF, VDCG=1.8 V to 5.5 V - 50 ns

1. Evaluated by characterization – Not tested in production.

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 ST25DV04KC ST25DV16KC ST25DV64KC
RF electrical parameters

9.4 RF electrical parameters

This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the
device in RF mode.
The parameters in the following tables are derived from tests performed under the measurement conditions
summarized in the relevant tables. Check that the operating conditions in the circuit match the measurement
conditions when relying on the quoted parameters.

Table 256. RF characteristics

Symbol Parameter Condition Min Typ Max Unit

fCC External RF signal frequency - 13.553 13.56 13.567 MHz

Range 6 TA = -40 °C to 85 °C
H_ISO Operating field according to ISO(1) 150 - 5000 mA/m
Range 8 TA = -40 °C to 105 °C

10% carrier modulation index

150 mA/m > H_ISO > 1000 mA/m 10 - 30
MICARRIER MI=(A-B)/(A+B)(1) %

100% carrier modulation index(1) MI=(A-B)/(A+B) 95 - 100

Minimum time from carrier generation to

tMINCD From H-field min - - 1 ms
first data(1)
fSH Subcarrier frequency high(1) fCC/32 - 423.75 - kHz

fSL Subcarrier frequency low(1) fCC/28 - 484.28 - kHz

t1 Time for ST25DVxxKC response(1) 4352/fCC 318.6 320.9 323.3 µs

t2 Time between commands(1) 4192/fCC 309 311.5 314 µs

t3 Time between commands(1) 4384/fCC 323.3 - - µs

RF User memory write time (including 1 block - 5.2 - ms

Wt_Block
internal Verify) (1)(2) 4 blocks - 19.7 - ms
RF system memory write time including
Wt_Byte 1 byte - 4.9 - ms
internal Verify)(1)(2)
RF Mailbox write time (from VCD request
Wt_MB 256 bytes - 80.7 - ms
SOF to ST25DVxxKC response EOF)(1)(2)
RF Mailbox read time (from VCD request
Read_MB 256 bytes - 81 - ms
SOF to ST25DVxxKC response EOF) (1)(2)
CTUN Internal tuning capacitor(3) f = 13.56 MHz - 28.5 - pF

Backscattered level as defined by ISO

VBACK - 10 - - mV
test(1)
RF input voltage amplitude between AC0 Inventory and Read operations - 4.8 - V
VMIN_1 and AC1, VSS pin left floating, VAC0-VAC1
peak to peak(1) Write operations - 5.25 - V

AC voltage between AC0 and VSS or Inventory and Read operations - 2.25 - V
VMIN_2
between AC1 and VSS (1) Write operations - 2.7 - V

tbootRF Without DC supply (No VCC )(1) Set up time - 0.6 - ms

tRF_OFF RF OFF time(1) Chip reset 2 - - ms

1. Evaluated by characterization – not tested in production.

2. For VCD request coded in 1 out of 4 and ST25DVxxKC response in high data rate, single sub carrier.
3. Evaluated by characterization at 25°C – tested in production at 25 °C by correlating industrial tester measure with characterization results..

DS13519 - Rev 6 page 149/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Thermal characteristics

Note: All timing characterization where performed on a reference antenna with the following characteristics:
• ISO antenna class 1
• Tuning frequency = 13.7 MHz

Table 257. Operating conditions

Symbol Parameter Min. Max. Unit

Range 6 -40 85
TA Ambient operating temperature °C
Range 8 -40 105

Figure 83. ASK modulated signal shows an ASK modulated signal from the VCD to the ST25DVxxKC. The test
conditions for the AC/DC parameters are:
• Close coupling condition with tester antenna (1 mm)
• ST25DVxxKC performance measured at the tag antenna
• ST25DVxxKC synchronous timing, transmit and receive

Figure 83. ASK modulated signal

A t RFF
B t RFR
f CC

t RFSBL

DT19784V1
t M IN CD

9.5 Thermal characteristics

Table 258. Thermal characteristics

Symbol Parameter Value Unit

Thermal resistance junction-ambient

219
SO8N 4.9 x 6 mm, 1.27 mm pitch package(1)
Thermal resistance junction-ambient
ƟJA 255 °C/W
TSSOP8 3 x 6.4 mm, 0.65 mm pitch package(1)
Thermal resistance junction-ambient
67
UFDFN8 2 × 3 mm, 0.5 mm pitch package(1)(2)

1. Jedec JESD51-7 2s2p board

2. Exposed pad soldered to board

DS13519 - Rev 6 page 150/202

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Package information

10 Package information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages,
depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product
status are available at: www.st.com. ECOPACK is an ST trademark.

10.1 SO8N package information

This SO8N is an 8-lead, 4.9 x 6 mm, plastic small outline, 150 mils body width, package.

Figure 84. SO8N – Outline

h x 45˚

A2 A
c
b ccc
e

0.25 mm
D SEATING GAUGE PLANE
PLANE
C k
8

O7_SO8_ME_V2
E1 E
1 L
A1
L1

1. Drawing is not to scale.

DS13519 - Rev 6 page 151/202

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SO8N package information

Table 259. SO8N – Mechanical data

millimeters inches (1)

Symbol
Min. Typ. Max. Min. Typ. Max.

A - - 1.750 - - 0.0689
A1 0.100 - 0.250 0.0039 - 0.0098
A2 1.250 - - 0.0492 - -
b 0.280 - 0.480 0.0110 - 0.0189
c 0.170 - 0.230 0.0067 - 0.0091

D(2) 4.800 4.900 5.000 0.1890 0.1929 0.1969

E 5.800 6.000 6.200 0.2283 0.2362 0.2441

E1(3) 3.800 3.900 4.000 0.1496 0.1535 0.1575

e - 1.270 - - 0.0500 -
h 0.250 - 0.500 0.0098 - 0.0197
k 0° - 8° 0° - 8°
L 0.400 - 1.270 0.0157 - 0.0500
L1 - 1.040 - - 0.0409 -
ccc - - 0.100 - - 0.0039

1. Values in inches are converted from mm and rounded to four decimal digits.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed
0.15 mm per side
3. Dimension “E1” does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm per
side.

Note: The package top may be smaller than the package bottom. Dimensions D and E1 are determinated at the
outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interleads flash,
but including any mismatch between the top and bottom of plastic body. Measurement side for mold flash,
protusions or gate burrs is bottom side.

Figure 85. SO8N - Footprint example

0.6 (x8)
3.9
6.7

O7_SO8N_FP_V2

1.27

1. Dimensions are expressed in millimeters.

DS13519 - Rev 6 page 152/202

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TSSOP8 package information

10.2 TSSOP8 package information

This TSSOP is an 8-lead, 3 x 6.4 mm, 0.65 mm pitch, thin shrink small outline package.

Figure 86. TSSOP8 – Outline

8 5

k
E1 E
A1 L

L1
1 4

6P_TSSOP8_ME_V3
A A2
c
b e

1. Drawing is not to scale.

Table 260. TSSOP8 – Mechanical data

millimeters inches (1)

Symbol
Min. Typ. Max. Min. Typ. Max.

A - - 1.200 - - 0.0472
A1 0.050 - 0.150 0.0020 - 0.0059
A2 0.800 1.000 1.050 0.0315 0.0394 0.0413
b 0.190 - 0.300 0.0075 - 0.0118
c 0.090 - 0.200 0.0035 - 0.0079

D(2) 2.900 3.000 3.100 0.1142 0.1181 0.1220

e - 0.650 - - 0.0256 -
E 6.200 6.400 6.600 0.2441 0.2520 0.2598

E1(3) 4.300 4.400 4.500 0.1693 0.1732 0.1772

L 0.450 0.600 0.750 0.0177 0.0236 0.0295

L1 - 1.000 - - 0.0394 -
k 0° - 8° 0° - 8°
aaa - - 0.100 - - 0.0039

1. Values in inches are converted from mm and rounded to four decimal digits.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed
0.15 mm per side
3. Dimension “E1” does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm per
side.

DS13519 - Rev 6 page 153/202

 ST25DV04KC ST25DV16KC ST25DV64KC
TSSOP8 package information

Note: The package top may be smaller than the package bottom. Dimensions D and E1 are determinated at the
outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interleads flash,
but including any mismatch between the top and bottom of plastic body. Measurement side for mold flash,
protusions or gate burrs is bottom side.

Figure 87. TSSOP8 – Footprint example

1.55
0.40

0.65

2.35

6P_TSSOP8_FP_V2
5.80
7.35

1. Dimensions are expressed in millimeters.

DS13519 - Rev 6 page 154/202

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UFDFN8 package information

10.3 UFDFN8 package information

UFDFPN8 is an 8-lead, 2 × 3 mm, 0.5 mm pitch ultra thin profile fine pitch dual flat package.

Figure 88. UFDFN8 - Outline

D A B
N
A
ccc C
A1
Pin #1 C
ID marking
E eee C
Seating plane A3
Side view

1 2 2x aaa C
2x aaa C
Top view

D2 Datum A
e b
1 2
L1
L3 L L3

Pin #1
ID marking E2
e/2 L1
e Terminal tip
K
L Detail “A”
Even terminal
ND-1 x e
Bottom view See Detail “A”

1. Max. package warpage is 0.05 mm.

2. Exposed copper is not systematic and can appear partially or totally according to the cross section.
3. Drawing is not to scale.

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UFDFN8 package information

Table 261. UFDFN8 - Mechanical data

millimeters inches (1)

Symbol
Min Typ Max Min Typ Max

A 0.450 0.550 0.600 0.0177 0.0217 0.0236

A1 0.000 0.020 0.050 0.0000 0.0008 0.0020

b(2) 0.200 0.250 0.300 0.0079 0.0098 0.0118

D 1.900 2.000 2.100 0.0748 0.0787 0.0827

D2 1.200 - 1.600 0.0472 - 0.0630
E 2.900 3.000 3.100 0.1142 0.1181 0.1220
E2 1.200 - 1.600 0.0472 - 0.0630
e - 0.500 - 0.0197
K 0.300 - - 0.0118 - -
L 0.300 - 0.500 0.0118 - 0.0197
L1 - - 0.150 - - 0.0059
L3 0.300 - - 0.0118 - -
aaa - - 0.150 - - 0.0059
bbb - - 0.100 - - 0.0039
ccc - - 0.100 - - 0.0039
ddd - - 0.050 - - 0.0020

eee (3) - - 0.080 - - 0.0031

1. Values in inches are converted from mm and rounded to 4 decimal digits.

2. Dimension b applies to plated terminal and is measured between 0.15 and 0.30 mm from the terminal tip.
3. Applied for exposed die paddle and terminals. Exclude embedding part of exposed die paddle from measuring.

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 ST25DV04KC ST25DV16KC ST25DV64KC
WLCSP10 package information

10.4 WLCSP10 package information

Figure 89. WLCSP - 10 balls, 1.649x1.483 mm, 0.4 mm pitch, wafer level chip scale package outline

bbb Z
I Orientation reference
DETAIL A D X Y
H
e J

e1 E

A F aaa
G (4X)
A3
A2
SIDE VIEW BOTTOM VIEW TOP VIEW

BUMP

eee Z
A1

DETAIL A
ROTATED 90
Z
b(10x)
SEATING PLANE
ccc M Z X Y
ddd M Z

1. Drawing is not to scale.

2. Dimension is measured at the maximum bump diameter parallel to primary datum Z.
3. Primary datum Z and seating plane are defined by the spherical crowns of the bump.
4. Bump position designation per JESD 95-1, SPP-010.

Table 262. WLCSP - 10 balls, 1.649x1.483 mm, 0.4 mm pitch, wafer level chip scale mechanical data

millimeters inches (1)

Symbol
Min Typ Max Min Typ Max

A 0.265 0.295 0.325 0.0104 0.0116 0.0128

A1 - 0.095 - - 0.0037 -
A2 - 0.175 - - 0.0069 -
A3 - 0.025 - - 0.0010 -
b - 0.185 - - 0.0073 -
D - 1.649 1.669 - 0.0649 0.0657
E - 1.483 1.503 - 0.0584 0.0592
e - 0.400 - - 0.0157 -
e1 - 0.800 - - 0.0315 -
H - 0.346 - - 0.0136 -
I - 1.039 - - 0.0409 -
J - 0.200 - - 0.0079 -

DS13519 - Rev 6 page 157/202

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WLCSP10 package information

millimeters inches (1)

Symbol
Min Typ Max Min Typ Max

F - 0.314 - - 0.0124 -
G - 0.342 - - 0.0135 -
aaa - 0.110 - - 0.0043 -
bbb - 0.110 - - 0.0043 -
ccc - 0.110 - - 0.0043 -
ddd - 0.060 - - 0.0024 -
eee - 0.060 - - 0.0024 -

1. Values in inches are converted from mm and rounded to 4 decimal digits.

Figure 90. WLCSP - 10 balls, 1.649x1.483 mm, 0.4 mm pitch, wafer level chip scale recommended footprint

Dpad

Dsm

Table 263. WLCSP10 recommended PCB design rules

Dimension Recommended values

Pitch 0.4 mm
Dpad 0,225 mm
Dsm 0.290 mm typ. (depends on soldermask registration tolerance)
Stencil opening 0.250 mm
Stencil thickness 0.100 mm

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 ST25DV04KC ST25DV16KC ST25DV64KC
UFDFPN12 package information

10.5 UFDFPN12 package information

UFDFPN12 is an 12-lead, 3 x 3 mm, 0.5 mm pitch ultra thin profile fine pitch dual flat package.

Figure 91. UFDFPN12 - Outline

Pin #1 ID marking
E2
E e

D D2

k
L

TOP VIEW BOTTOM VIEW

SIDE VIEW

1. Drawing is not to scale.

Table 264. UFDFPN12 - Mechanical data

millimeters inches (1)

Symbol
Min Typ Max Min Typ Max

A(2) 0.45 0.55 0.60 0.0177 0.0217 0.0236

b 0.20 0.25 0.30 0.0079 0.0098 0.0118

D 2.95 3.00 3.10 0.1161 0.1181 0.1220
D2 1.35 1.40 1.45 0.0531 0.0551 0.0571
e 0.50 0.0197
E 2.95 3.00 3.10 0.1161 0.1181 0.1220
E2 2.50 2.55 2.60 0.0984 0.1004 0.1024
L 0.25 0.30 0.35 0.0098 0.0118 0.0138
k 0.40 0.0157

1. Values in inches are converted from mm and rounded to 4 decimal digits.

2. Package total thickness.

DS13519 - Rev 6 page 159/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Ordering information

11 Ordering information

Table 265. Ordering information scheme

Example: ST25DV 64K C - IE 6 D 3

Device type
ST25DV = Dynamic NFC/RFID tag based
on ISO 15693 and NFC T5T

Memory size
04K = 4 Kbits
16K = 16 Kbits
64K = 64 Kbits
Version
C

Device Features
IE = I2C and GPO open drain, fast transfer mode and energy harvesting
JF = I2C and GPO CMOS, fast transfer mode, energy harvesting and low power
mode

Device grade
6 = industrial: device tested with standard test flow over - 40 to 85 °C
8 = industrial device tested with standard test flow over -40 to 105 °C (UFDFPN8 and UFDFPN12
only) or over -40 to 125 °C (SO8N and TSSOP8 only, 105 °C only for RF interface)
Package
S = SO8N
T = TSSOP8
D = UFDFPN12
C = UFDFPN8
L = WLCSP (thin 10 balls) (Only for 04K version)
Capacitance
3 = 28.5 pF

Note: Parts marked as “ES” or “E” are not yet qualified and therefore not approved for use in production. ST is
not responsible for any consequences resulting from such use. In no event will ST be liable for the customer
using any of these engineering samples in production. ST’s Quality department must be contacted prior to any
decision to use these engineering samples to run a qualification activity.

DS13519 - Rev 6 page 160/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Bit representation and coding for fast commands

Appendix A Bit representation and coding for fast commands

Data bits are encoded using Manchester coding, according to the following schemes. For the low data rate, same
subcarrier frequency or frequencies is/are used. In this case, the number of pulses is multiplied by 4 and all times
increase by this factor. For the Fast commands using one subcarrier, all pulse numbers and times are divided by
2.

A.1 Bit coding using one subcarrier

A.1.1 High data rate

For the fast commands, a logic 0 starts with four pulses at 423.75 kHz (fC/32) followed by an unmodulated time of
9.44 µs, as shown in Figure 92.

Figure 92. Logic 0, high data rate, fast commands

DT12066bV1
18.88 µs

For the Fast commands, a logic 1 starts with an unmodulated time of 9.44 µs followed by four pulses of 423.75
kHz (fC/32), as shown in Figure 93.

Figure 93. Logic 1, high data rate, fast commands

DT12067bV1
18.88 µs

A.1.2 Low data rate

For the Fast commands, a logic 0 starts with 16 pulses at 423.75 kHz (fC/32) followed by an unmodulated time of
37.76 µs, as shown in Figure 94.

Figure 94. Logic 0, low data rate, fast commands

DT12069bV1

75.52 µs

For the Fast commands, a logic 1 starts with an unmodulated time of 37.76 µs followed by 16 pulses at 423.75
kHz (fC/32), as shown in Figure 95.

DS13519 - Rev 6 page 161/202

 ST25DV04KC ST25DV16KC ST25DV64KC
ST25DVxxKC to VCD frames

Figure 95. Logic 1, low data rate, fast commands

DT12071bV1
75.52 µs

Note: For fast commands, bit coding using two subcarriers is not supported.

A.2 ST25DVxxKC to VCD frames

Frames are delimited by an SOF and an EOF. They are implemented using code violation. Unused options are
reserved for future use. For the low data rate, the same subcarrier frequency or frequencies is/are used. In this
case, the number of pulses is multiplied by 4. For the Fast commands using one subcarrier, all pulse numbers
and times are divided by 2.

A.3 SOF when using one subcarrier

A.3.1 High data rate

For the Fast commands, the SOF comprises an unmodulated time of 28.32 µs, followed by 12 pulses at 423.75
kHz (fC/32), and a logic 1 that consists of an unmodulated time of 9.44 µs followed by four pulses at 423.75 kHz,
as shown in Figure 96.

Figure 96. Start of frame, high data rate, one subcarrier, fast commands

DT12079bV1
56.64 µs 18.88 µs

A.3.2 Low data rate

For the Fast commands, the SOF comprises an unmodulated time of 113.28 µs, followed by 48 pulses at 423.75
kHz (fC/32), and a logic 1 that includes an unmodulated time of 37.76 µs followed by 16 pulses at 423.75 kHz, as
shown in Figure 97.

Figure 97. Start of frame, low data rate, one subcarrier, fast commands
DT12081bV1

226.56 µs 75.52 µs

DS13519 - Rev 6 page 162/202

 ST25DV04KC ST25DV16KC ST25DV64KC
EOF when using one subcarrier

A.4 EOF when using one subcarrier

A.4.1 High data rate

For the Fast commands, the EOF comprises a logic 0 that includes four pulses at 423.75 kHz and an
unmodulated time of 9.44 µs, followed by 12 pulses at 423.75 kHz (fC/32) and an unmodulated time of 37.76
µs, as shown in Figure 98.

Figure 98. End of frame, high data rate, one subcarrier, fast commands

DT12085bV1
18.88 µs 56.64 µs

A.4.2 Low data rate

For the Fast commands, the EOF comprises a logic 0 that includes 16 pulses at 423.75 kHz and an unmodulated
time of 37.76 µs, followed by 48 pulses at 423.75 kHz (fC/32) and an unmodulated time of 113.28 µs, as shown in
Figure 99.

Figure 99. End of frame, low data rate, one subcarrier, fast commands

DT12087bV1
75.52 µs 226.56 µs

Note: For SOF and EOF in fast commands, bit coding using two subcarriers is not supported.

DS13519 - Rev 6 page 163/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequences

Appendix B I²C sequences

B.1 Device select codes

Following table assumes default values for I2C_DEVICE_CODE[3:0] (1010b) and E0 (1b) bits. Device select
value should be adapted to I2C_DEVICE_CODE[3:0] and E0 values programmed into the I2C_CFG static register
if different from default factory values.

Table 266. Device select usage

Device select value

Comment
Hexadecimal Binary

Device select generic

- 1010 E211 R/W E2 = 0b User memory, Dynamic registers, FTM mailbox
E2 = 1b System memory
A6h 1010 0110b User memory, Dynamic registers, FTM mailbox writing
A7h 1010 0111b User memory, Dynamic registers, FTM mailbox reading
AEh 1010 1110b System memory writing
AFh 1010 1111b System memory reading

B.2 I²C Byte writing and polling

B.2.1 I²C byte write in user memory

Table 267. Byte Write in user memory when write operation allowed

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
DATA - Send Data (1 Byte)
- ACK 9th bit
Stop - Start of Programming

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I²C Byte writing and polling

Table 268. Polling during programming after byte writing in user memory

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- NoACK 9th bit Device Busy
Start A6h - Device select for writing
- NoACK 9th bit Device Busy
... ... ... Device select for writing
... ... ... 9th bit Device Busy
Start A6h - Device select for writing
9th bit Device ready
- ACK
Programing completed
Stop - End of Polling

Table 269. Byte Write in user memory when write operation is not allowed

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
DATA - Send Data
- NoACK 9th bit: Write access not granted or FTM activated.
No Programming
Stop -
Device return in Standby

DS13519 - Rev 6 page 165/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C Byte writing and polling

B.2.2 I²C byte writing in dynamic registers and polling

Table 270. Byte Write in Dynamic Register (if not Read Only)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
Send Address LSB (1 Byte)
Dynamic Register ADDRESS_LSB - Dynamic register are located from address
2000h to 2007h , some are only readable
- ACK 9th bit
DATA - Send Data
- ACK 9th bit
Stop - Immediate update of Dynamic register

Table 271. Polling during programming after byte write in Dynamic Register

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

9th bit Device Busy
- ACK
Dynamic register updates is immediate
Stop - End of Polling

Table 272. Byte Write in Dynamic Register if Read Only

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
20h - Send Address MSB (1 Byte)
- NoACK 9th bit
Send Address LSB (1 Byte)
RO Dynamic Register ADDRESS_LSB - Addresses 2001h, 2004h, 2005h and 2007h are Read Only
registers.
- ACK 9th bit
DATA - Send Data
- NoACK 9th bit
No Programming
Stop -
Device return in Standby

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I²C Byte writing and polling

B.2.3 I2C byte write in mailbox and polling

Table 273. Byte Write in mailbox when mailbox is free from RF message and fast transfer mode is
activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
20h - Send mailbox address MSB (1 Byte)
- ACK 9th bit
Send Address LSB (1 Byte)
08h -
Write must be done at first address of mailbox
- ACK 9th bit
DATA - Send Data
- ACK 9th bit
Stop - Immediate update of mailbox

Table 274. Byte Write in mailbox when mailbox is not free from RF message fast transfer mode is not
activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
20h - Send mailbox address MSB (1 Byte)
- ACK 9th bit
Send Address LSB (1 Byte)
08h -
Write must be done at first address of mailbox
- ACK 9th bit
DATA - Send Data
9th bit Access
- NoACK
Mailbox busy or FTM not activated
No Programming
Stop -
Device return in Standby

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I²C Byte writing and polling

B.2.4 I2C byte write and polling in system memory

Table 275. Byte Write in System memory if I2C security session is open and register is not RO

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
DATA - Send Data
- ACK 9th bit
Stop - Start of Programming

Table 276. Polling during programing after byte write in System memory if I2C security session is open
and register is not RO

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- NoACK 9th bit Device Busy
Start AEh - Device select for writing
- NoACK 9th bit Device Busy
Start AEh - Device select for writing
- ... 9th bit
Start AEh - Device select for writing
9th bit Device ready
- ACK
Programing completed
Stop - end of Polling

DS13519 - Rev 6 page 168/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential writing and polling

Table 277. Byte Write in System memory if I2C security session is closed or register is RO

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
DATA - Send Data
- NoACK 9th bit
No Programming
Stop -
Device return in Standby

B.3 I²C sequential writing and polling

B.3.1 I2C sequential write in user memory and polling

Table 278. Sequential write User memory when write operation allowed and all bytes belong to same area

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
DATA 0 - Send Data 0
- ACK 9th bit
DATA 1 - Send Data 1
- ACK 9th bit
... - ...
- ... ...
Send Data n
DATA n -
n ≤ 256
- ACK 9th bit
Stop - Start of Programming

DS13519 - Rev 6 page 169/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential writing and polling

Table 279. Polling during programing after sequential write in User memory when write operation allowed
and all bytes belong to same area.

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- NoACK 9th bit Device Busy
Start A6h - Device select for writing
- NoACK 9th bit Device Busy
Start A6h - Device select for writing
- ... 9th bit Device Busy
Start A6h - Device select for writing
9th bit Device ready
- ACK
Programing completed
Stop - End of Polling

Table 280. Sequential write in User memory when write operation allowed and crossing over area border

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
DATA 0 - Send Data 0
- ACK 9th bit
DATA 1 - Send Data 1
- ACK 9th bit
... - ...
- ... ...
Send Data n
DATA n -
Address is located in next memory area
- NoACK 9th bit
No programming
Stop -
Device return in Standby

DS13519 - Rev 6 page 170/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential writing and polling

Table 281. Polling during programming after sequential write in User memory when write operation
allowed and crossing over area border

Master drives SDA Slave drives SDA

Comment
Request/Response Frame

Start A6h - Device select for writing

9th bit Device ready
- ACK
No programming
Stop - End of Polling

B.3.2 I2C sequential write in mailbox and polling

Table 282. Sequential write in mailbox when mailbox is free from RF message and fast transfer mode is
activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send mailbox Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send mailbox Address LSB (1 Byte)
- ACK 9th bit
DATA 0 - Send Data 0
- ACK 9th bit
DATA 1 - Send Data 1
- ACK 9th bit
... - ...
- ... ...
Send Data n
DATA n -
n ≤ 256
- ACK 9th bit
Stop - Immediate mailbox content update

Table 283. Polling during programing after sequential write in mailbox

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

9th bit Device ready
- ACK
Mailbox is immediately updated
Stop - End of Polling

DS13519 - Rev 6 page 171/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C Read current address

B.4 I²C Read current address

B.4.1 I2C current address read in User memory

Table 284. Current byte Read in User memory if read operation allowed (depending on area protection and
RF user security session)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A7h - Device select for reading

- ACK 9th bit
Receive Data located on last pointed address+1, or at address 0 after power-up, in
DATA
user memory
NO_ACK - 9th bit
Stop - End of Reading

Table 285. Current Read in User memory if read operation not allowed (depending on area protection and
RF user security session)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A7h - Device select for reading

- ACK 9th bit
Read of data not allowed
FFh
ST25DV release SDA
NO_ACK 9th bit
Stop - End of Reading

DS13519 - Rev 6 page 172/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C random address read

B.5 I²C random address read

B.5.1 I2C random address read in user memory

Table 286. Random byte read in User memory if read operation allowed (depending on area protection and
RF user security session)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- DATA Receive Data
NO_ACK - 9th bit
Stop - End of Reading

Table 287. Random byte read in User memory if operation not allowed (depending on area protection and
RF user security)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
Read of data not allowed
- FFh
release SDA
NO_ACK - 9th bit
Stop - End of Reading

DS13519 - Rev 6 page 173/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C random address read

B.5.2 I2C Random address read in system memory

Table 288. Byte Read System memory (Static register or I2C Password after a valid Present I2C Password)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start AFh - Device select for reading
- ACK 9th bit
- DATA Receive Data
NO_ACK - 9th bit
Stop - End of reading

B.5.3 I2C Random address read in dynamic registers

Table 289. Random byte read in Dynamic registers

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
20h - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Adress LSB (1 Byte)
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- DATA Receive Data
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 174/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

B.6 I²C sequential read

B.6.1 I2C sequential read in user memory

Table 290. Sequential Read User memory if read operation allowed (depending on area protection and RF
user security session) and all bytes belong to the same area

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start A7h0 - Device select for reading
- ACK 9th bit
- DATA 0 Receive Data 0
ACK - 9th bit
- DATA 1 Receive Data 1
ACK - 9th bit
- ... ...
... - ...
- DATA n Receive Data n
NO_ACK - 9th bit
Stop - End of Reading

DS13519 - Rev 6 page 175/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

Table 291. Sequential Read User memory if read operation allowed (depending on area protection and RF
user security session) but crossing area border

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- DATA 0 Receive Data 0
ACK - 9th bit
- DATA 1 Receive Data 1
ACK - 9th bit
- ... ...
... - ...
- DATA n Receive Data last Address available
ACK - 9th bit
Data is located in next memory area
- FFh
ST25DV release SDA
ACK - 9th bit
- ... ...
... - ...
Data is located in next memory area
- FFh
ST25DV release SDA
Stop - End of reading

DS13519 - Rev 6 page 176/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

Table 292. Sequential Read User memory if read operation allowed (depending on area protection and RF
user security session)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
ST25DV release SDA
- FFh
Reading access not granted
ACK - 9th bit
- ... ...
... - ...
ST25DV release SDA
- FFh
Reading access not granted
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 177/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

B.6.2 I2C sequential read in system memory

Table 293. Sequential in Read System memory (I2C security session open if reading I2C_PWD)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
ADDRESS_MSB - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start AF7h - Device select for reading
- ACK 9th bit
- DATA Receive Data 0
ACK - 9th bit
- DATA Receive Data 1
ACK - 9th bit
- ... ...
... - ...
- DATA Receive Data n
NO_ACK - 9th bit
Stop - End of Reading

DS13519 - Rev 6 page 178/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

Table 294. Sequential Read system memory when access is not granted (I2C password I2C_PWD)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
90h - Send Address MSB (1 Byte)
- ACK 9th bit
ADDRESS_LSB - Send Address LSB (1 Byte)
- ACK 9th bit
Start AFh - Device select for reading
- ACK 9th bit
- DATA Receive Data 0
ST25DV release SDA
- FFh
Reading access is not granted
ACK - 9th bit
- ... ...
... - ...
ST25DV release SDA
- FFh
Reading access is not granted
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 179/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

B.6.3 I2C sequential read in dynamic registers

Table 295. Sequential read in dynamic register

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
20h - Send Address MSB (1 Byte)
- ACK 9th bit
Send Address LSB (1 Byte)
Dynamic register ADDRESS_LSB - Fynamic register are located form address
2000h to 2007
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- DATA Receive Data 0
ACK - 9th bit
- DATA Receive Data 1
ACK - 9th bit
- ... ...
... - ...
- Data Receive Data n
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 180/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

Table 296. Sequential read in Dynamic register and mailbox continuously if fast transfer mode is activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
20h - Send Address MSB (1 Byte)
- ACK 9th bit
Send Address LSB (1 Byte)
Dynamic Register
- Dynamic register are located from address
ADDRESS_LSB
2000h to 2007h
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- DATA 0 Receive Data 0
ACK - 9th bit
- DATA 1 Receive Data 1
ACK - 9th bit
- ... ...
... - ...
Receive Data n (n ≤ 8)
- DATA n
Last Dynamic register address 2007h
ACK - 9th bit
- DATA n + 1 Mailbox byte 0
ACK - 9th bit
- DATA n + 2 Mailbox byte 1
ACK - 9th bit
- ... ...
... - ...
- Data n + i Mailbox byte i (i < 256)
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 181/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

B.6.4 I2C sequential read in mailbox

Table 297. Sequential in mailbox if fast transfer mode is activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
Send Address MSB (1 Byte)
20h or 21h -
2007h < @ 2108h
- ACK 9th bit
Send Address LSB (1 Byte)
ADDRESS_LSB -
2007h < @ 2108h
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- DATA 0 Receive Data 0
ACK - 9th bit
- DATA 1 Receive Data 1
ACK - 9th bit
- ... ...
... - ...
- Data n Receive Data n
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 182/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C sequential read

Table 298. Sequential read in mailbox if fast transfer mode is not activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start A6h - Device select for writing

- ACK 9th bit
Send Address MSB (1 Byte)
20h or 21h -
2007h < @ 2108h
- ACK 9th bit
Send Address LSB (1 Byte)
ADDRESS_LSB -
2007h < @ 2108h
- ACK 9th bit
Start A7h - Device select for reading
- ACK 9th bit
- FFh release SDA
ACK - 9th bit
- FFh release SDA
ACK - 9th bit
- ... ...
... - ...
- FFh release SDA
NO_ACK - 9th bit
Stop - End of reading

DS13519 - Rev 6 page 183/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C password relative sequences

B.7 I²C password relative sequences

B.7.1 I2C write password

Table 299. Write Password when I2C security session is already open and fast transfer mode is not
activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
09h - Send I2C_PWD MSB address
- ACK 9th bit
00h - Send I2C_PWD LSB address
- ACK 9th bit
I2C_PWD_BYTE_7 - Send I2C_PWD MSB
- ACK 9th bit
I2C_PWD_BYTE_6 DATA 0 Send Data
- ACK 9th bit
... - ...
- ... ...
I2C_PWD_BYTE_0 - Send I2C_PWD LSB
- ACK 9th bit
07h - Write password command
- ACK 9th bit
I2C_PWD_BYTE_7 - Send I2C_PWD MSB
- ACK 9th bit
I2C_PWD_BYTE_6 DATA 0 Send Data
- ACK 9th bit
... - ...
- ... ...
I2C_PWD_BYTE_0 - Send I2C_PWD LSB
- ACK 9th bit

Stop - Start of I2C password programming

DS13519 - Rev 6 page 184/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C password relative sequences

Table 300. Write Password when I2C security session is not open or fast transfer mode activated

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
09h - Send I2C_PWD MSB address
- ACK 9th bit
00h - Send I2C_PWD LSB address
- NoACK 9th bit
No PWD Programming
Stop -
Device return in Standby

DS13519 - Rev 6 page 185/202

 ST25DV04KC ST25DV16KC ST25DV64KC
I²C password relative sequences

B.7.2 I2C present password

Table 301. Present Password (whatever status of I2C security session or fast transfer mode)

Request/Response Frame
Comment
Master drives SDA Slave drives SDA

Start AEh - Device select for writing

- ACK 9th bit
09h - Send I2C_PWD MSB address
- ACK 9th bit
00h - Send I2C_PWD LSB address
- ACK 9th bit
I2C_PWD_BYTE_7 - Send I2C_PWD MSB
- ACK 9th bit
I2C_PWD_BYTE_6 DATA 0 Send Data
- ACK 9th bit
... - ...
- ... ...
I2C_PWD_BYTE_0 - Send I2C_PWD LSB
- ACK 9th bit
09h - Present password command
- ACK 9th bit
I2C_PWD_BYTE_7 - Send I2C_PWD MSB
- ACK 9th bit
I2C_PWD_BYTE_6 - Send Data
- ACK 9th bit
... - ...
- ... ...
I2C_PWD_BYTE_0 - Send I2C_PWD LSB
- ACK 9th bit
ST25DV with active I2C_PWD.
Stop -
Result is immediate.

DS13519 - Rev 6 page 186/202

 ST25DV04KC ST25DV16KC ST25DV64KC

Revision history
Table 302. Document revision history

Date Revision Changes

23-Jun-2021 1 Initial release.

22-Jul-2021 2 Modified the title of the document.
Added WLCSP10 package
Updated:
• Features
09-Feb-2022 3 • Section 1.1 ST25DVxxKC block diagram
• Section 1.2 ST25DVxxKC packaging
• Section 2.2.2 Low power down (LPD)
• Section 2.4.1 Driver supply voltage (VDCG)
• Section 2.4.2 General purpose output (GPO)
Updated:
• Features
• Figure 15. I²C “RFSwitchOff” command
• Figure 16. I²C “RFSwitchOn” commandSection 6.3 Device addressing
22-Jul-2022 4
• Figure 81. I²C AC waveforms
• Section 10.1 SO8N package information
• Section 10.2 TSSOP8 package information
• Table 265. Ordering information scheme
Updated:
• Features
• Section 3.1 Wired interface
• Section 3.2 Contactless interface
• Section 7.6.23 Extended Get System Info
12-Jan-2023 5 • Section 7.6.30 Manage GPO
• Section 9.1 Maximum ratings
• Section 9.2 I²C parameters
• Section 9.3 GPO characteristics
• Section 9.4 RF electrical parameters
• Table 256. RF characteristics
Updated:
06-Feb-2023 6
• Table 164. Extended Get System Info request format

DS13519 - Rev 6 page 187/202

 ST25DV04KC ST25DV16KC ST25DV64KC
Contents

Contents
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 ST25DVxxKC block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 ST25DVxxKC packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Serial link (SCL, SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1 Serial clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.2 Serial data (SDA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Power control (VCC, LPD, VSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.1 Supply voltage (VCC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.2 Low power down (LPD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.3 Ground (VSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 RF link (AC0 AC1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.1 Antenna coil (AC0, AC1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Process control (GPO, VDCG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4.1 Driver supply voltage (VDCG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4.2 General purpose output (GPO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Energy harvesting analog output (V_EH). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Power management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.1 Wired interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Contactless interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Memory management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.1 Memory organization overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 User memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 User memory areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 System configuration area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 Dynamic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5 Fast transfer mode mailbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 ST25DVxxKC specific features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5.1 Fast transfer mode (FTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.1 Fast transfer mode registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.2 Fast transfer mode usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2 RF management feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.1 RF management registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.2 RF management feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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5.3 Interface arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.3.1 I²C priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.4 GPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.4.1 ST25DVxxKC interrupt capabilities on RF events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.4.2 ST25DVxxKC interrupt capabilities on I2C events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.4.3 GPO and power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.4.4 GPO registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.4.5 Configuring GPO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.5 Energy harvesting (EH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.5.1 Energy harvesting registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.5.2 Energy harvesting feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.5.3 EH delivery state diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.5.4 EH delivery sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.6 Data protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.6.1 Data protection registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.6.2 Passwords and security sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.6.3 User memory protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
5.6.4 System memory protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5.7 Device parameter registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6 I²C operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
6.1 I²C protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.1.1 Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.1.2 Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.1.3 Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.1.4 Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.2 I²C timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.2.1 I2C timeout on Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.2.2 I2C timeout on clock period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.3 Device addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
6.4 I²C Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
6.4.1 I2C Byte write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
6.4.2 I2C Sequential write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.4.3 Minimizing system delays by polling on ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.5 I²C read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.5.1 Random address read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.5.2 Current address read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.5.3 Sequential read access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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6.5.4 Acknowledge in read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

6.6 I²C password management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.6.1 I2C present password command description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.6.2 I2C write password command description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
7 RF operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
7.1 RF communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
7.1.1 Access to a ISO/IEC 15693 device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
7.2 RF communication and energy harvesting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
7.3 Fast transfer mode mailbox access in RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
7.4 RF protocol description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
7.4.1 Protocol description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
7.4.2 ST25DVxxKC states referring to RF protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
7.4.3 Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
7.4.4 Request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7.4.5 Request flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7.4.6 Response format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
7.4.7 Response flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
7.4.8 Response and error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
7.5 Timing definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
7.6 RF commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
7.6.1 RF command code list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
7.6.2 Command codes list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
7.6.3 General command rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
7.6.4 Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
7.6.5 Stay Quiet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
7.6.6 Read Single Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
7.6.7 Extended Read Single Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.6.8 Write Single Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.6.9 Extended Write Single Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.6.10 Lock Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.6.11 Extended Lock block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
7.6.12 Read Multiple Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
7.6.13 Extended Read Multiple Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
7.6.14 Write Multiple Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7.6.15 Extended Write Multiple Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.6.16 Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
7.6.17 Reset to Ready . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

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7.6.18 Write AFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

7.6.19 Lock AFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
7.6.20 Write DSFID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
7.6.21 Lock DSFID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.6.22 Get System Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
7.6.23 Extended Get System Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
7.6.24 Get Multiple Block Security Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
7.6.25 Extended Get Multiple Block Security Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
7.6.26 Read Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
7.6.27 Write Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
7.6.28 Read Dynamic Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
7.6.29 Write Dynamic Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
7.6.30 Manage GPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
7.6.31 Write Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
7.6.32 Read Message Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
7.6.33 Read Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
7.6.34 Fast Read Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
7.6.35 Write Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
7.6.36 Present Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
7.6.37 Fast Read Single Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
7.6.38 Fast Extended Read Single Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
7.6.39 Fast Read Multiple Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
7.6.40 Fast Extended Read Multiple Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
7.6.41 Fast Write Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
7.6.42 Fast Read Message Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
7.6.43 Fast Read Dynamic Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
7.6.44 Fast Write Dynamic Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
8 Unique identifier (UID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
9 Device parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
9.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
9.2 I²C parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
9.3 GPO characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
9.4 RF electrical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
9.5 Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
10 Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
10.1 SO8N package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
10.2 TSSOP8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

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10.3 UFDFN8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

10.4 WLCSP10 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
10.5 UFDFPN12 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
11 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Appendix A Bit representation and coding for fast commands . . . . . . . . . . . . . . . . . . . . . . 161
A.1 Bit coding using one subcarrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
A.1.1 High data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
A.1.2 Low data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
A.2 ST25DVxxKC to VCD frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
A.3 SOF when using one subcarrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
A.3.1 High data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
A.3.2 Low data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
A.4 EOF when using one subcarrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
A.4.1 High data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
A.4.2 Low data rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Appendix B I²C sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
B.1 Device select codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
B.2 I²C Byte writing and polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
B.2.1 I²C byte write in user memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
B.2.2 I²C byte writing in dynamic registers and polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
B.2.3 I2C byte write in mailbox and polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
B.2.4 I2C byte write and polling in system memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
B.3 I²C sequential writing and polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
B.3.1 I2C sequential write in user memory and polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
B.3.2 I2C sequential write in mailbox and polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
B.4 I²C Read current address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
B.4.1 I2C current address read in User memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
B.5 I²C random address read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
B.5.1 I2C random address read in user memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
B.5.2 I2C Random address read in system memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
B.5.3 I2C Random address read in dynamic registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
B.6 I²C sequential read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
B.6.1 I2C sequential read in user memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
B.6.2 I2C sequential read in system memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
B.6.3 I2C sequential read in dynamic registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
B.6.4 I2C sequential read in mailbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

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B.7 I²C password relative sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

B.7.1 I2C write password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
B.7.2 I2C present password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

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List of tables
Table 1. 8-pin packages signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2. 10-pin packages signal names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3. 12-pin packages signal names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4. User memory as seen by RF and by I2C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 5. Maximum user memory block and byte addresses and ENDAi value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 6. Areas and limit calculation from ENDAi registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 7. ENDA1 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 8. ENDA1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 9. ENDA2 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 10. ENDA2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 11. ENDA3 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 12. ENDA3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 13. System configuration memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 14. Dynamic registers memory map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 15. Fast transfer mode mailbox memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 16. FTM access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 17. FTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 18. MB_CTRL_Dyn access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 19. MB_CTRL_Dyn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 20. MB_LEN_Dyn access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 21. MB_LEN_Dyn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 22. RF_MNGT access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 23. RF_MNGT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 24. RF_MNGT_Dyn access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 25. RF_MNGT_Dyn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 26. RF modes summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 27. RF modes configuration bits and effect on RF requests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 28. FIELD_CHANGE when RF is disabled or in sleep of off mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 29. GPO interrupt capabilities in function of RF field and VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 30. GPO1 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 31. GPO1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 32. GPO2 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 33. GPO2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 34. GPO_CTRL_Dyn access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 35. GPO_CTRL_Dyn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 36. IT_STS_Dyn access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 37. IT_STS_Dyn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 38. Enabling or disabling GPO interruptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 39. EH_MODE access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 40. EH_MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 41. EH_CTRL_Dyn access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 42. EH_CTRL_Dyn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 43. Energy harvesting at power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 44. RFA1SS access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 45. RFA1SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 46. RFA2SS access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 47. RFA2SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 48. RFA3SS access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 49. RFA3SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 50. RFA4SS access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 51. RFA4SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 52. I2CSS access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

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Table 53. I2CSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Table 54. LOCK_CCFILE access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 55. LOCK_CCFILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 56. LOCK_CFG access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 57. LOCK_CFG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 58. I2C_PWD access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 59. I2C_PWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 60. RF_PWD_0 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 61. RF_PWD_0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 62. RF_PWD_1 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 63. RF_PWD_1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 64. RF_PWD_2 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 65. RF_PWD_2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 66. RF_PWD_3 access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 67. RF_PWD_3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 68. I2C_SSO_Dyn access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 69. I2C_SSO_Dyn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 70. Security session type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 71. LOCK_DSFID access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 72. LOCK_DSFID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 73. LOCK_AFI access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 74. LOCK_AFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 75. DSFID access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 76. DSFID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 77. AFI access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 78. AFI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 79. MEM_SIZE access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 80. MEM_SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 81. BLK_SIZE access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 82. BLK_SIZE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 83. IC_REF access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 84. IC_REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 85. UID access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 86. UID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 87. IC_REV access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 88. IC_REV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 89. Device select code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 90. I2C_CFG access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 91. I2C_CFG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 92. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 93. Address most significant byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 94. Address least significant byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 95. ST25DVxxKC response depending on Request_flags. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 96. General request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 97. Definition of request flags 1 to 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 98. Request flags 5 to 8 when inventory_flag, Bit 3 = 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 99. Request flags 5 to 8 when inventory_flag, Bit 3 = 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 100. General response format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table 101. Definitions of response flags 1 to 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table 102. Response error code definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Table 103. Timing values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 104. Command codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Table 105. Inventory request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Table 106. Inventory response format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Table 107. Stay Quiet request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

DS13519 - Rev 6 page 195/202

 ST25DV04KC ST25DV16KC ST25DV64KC
List of tables

Table 108. Read Single Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Table 109. Read Single Block response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 110. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 111. Read Single Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Table 112. Extended Read Single Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Table 113. Extended Read Single Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Table 114. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Table 115. Extended Read Single Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Table 116. Write Single Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Table 117. Write Single Block response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 118. Write Single Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 119. Extended Write Single request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 120. Extended Write Single response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 121. Extended Write Single response format when Error_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 122. Lock block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 123. Lock block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 124. Lock block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 125. Extended Lock block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Table 126. Extended Lock block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Table 127. Extended Lock block response format when Error_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Table 128. Read Multiple Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Table 129. Read Multiple Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Table 130. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Table 131. Read Multiple Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Table 132. Extended Read Multiple Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Table 133. Extended Read Multiple Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Table 134. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Table 135. Extended Read Multiple Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Table 136. Write Multiple Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Table 137. Write Multiple Block response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Table 138. Write Multiple Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Table 139. Extended Write Multiple Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Table 140. Extended Write Multiple Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . 100
Table 141. Extended Write Multiple Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Table 142. Select request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Table 143. Select Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Table 144. Select response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Table 145. Reset to Ready request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Table 146. Reset to Ready response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Table 147. Reset to ready response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Table 148. Write AFI request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Table 149. Write AFI response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Table 150. Write AFI response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Table 151. Lock AFI request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Table 152. Lock AFI response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Table 153. Lock AFI response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Table 154. Write DSFID request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Table 155. Write DSFID response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Table 156. Write DSFID response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Table 157. Lock DSFID request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Table 158. Lock DSFID response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Table 159. Lock DSFID response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Table 160. Get System Info request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Table 161. Get System Info response format Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Table 162. Memory size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

DS13519 - Rev 6 page 196/202

 ST25DV04KC ST25DV16KC ST25DV64KC
List of tables

Table 163. Get System Info response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Table 164. Extended Get System Info request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Table 165. Parameter request list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Table 166. Extended Get System Info response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Table 167. Response Information Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Table 168. Response other field: ST25DVxxKC VICC memory size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
Table 169. Response other field: ST25DVxxKC IC Ref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Table 170. Response other field: ST25DVxxKC VICC command list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Table 171. Response other field: ST25DVxxKC VICC command list Byte 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Table 172. Response other field: ST25DVxxKC VICC command list Byte 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Table 173. Response other field: ST25DVxxKC VICC command list Byte 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Table 174. Response other field: ST25DVxxKC VICC command list Byte 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Table 175. Extended Get System Info response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
Table 176. Get Multiple Block Security Status request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
Table 177. Get Multiple Block Security Status response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . .113
Table 178. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
Table 179. Get Multiple Block Security Status response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . .113
Table 180. Extended Get Multiple Block Security Status request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114
Table 181. Extended Get Multiple Block Security Status response format when Error_flags NOT set . . . . . . . . . . . . . . . . .114
Table 182. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Table 183. Extended Get Multiple Block Security Status response format when Error_flag is set . . . . . . . . . . . . . . . . . . . .115
Table 184. Read Configuration request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Table 185. Read Configuration response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Table 186. Read Configuration response format when Error_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Table 187. Write Configuration request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Table 188. Write Configuration response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Table 189. Write configuration response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Table 190. Read Dynamic Configuration request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Table 191. Read Dynamic Configuration response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Table 192. Read Dynamic Configuration response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Table 193. Write Dynamic Configuration request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Table 194. Write Dynamic Configuration response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Table 195. Write Dynamic Configuration response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Table 196. Manage GPO request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Table 197. GPOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Table 198. Manage GPO response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Table 199. ManageGPO response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Table 200. Write Message request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Table 201. Write Message response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Table 202. Write Message response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Table 203. Read Message Length request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Table 204. Read Message Length response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Table 205. Read Message Length response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Table 206. Read Message request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Table 207. Read Message response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Table 208. Fast Read Message request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Table 209. Fast Read Message response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Table 210. Write Password request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Table 211. Write Password response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Table 212. Write Password response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Table 213. Present Password request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Table 214. Present Password response format when Error_flag is NOT set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Table 215. Present Password response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Table 216. Fast Read Single Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Table 217. Fast Read Single Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

DS13519 - Rev 6 page 197/202

 ST25DV04KC ST25DV16KC ST25DV64KC
List of tables

Table 218. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Table 219. Fast Read Single Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Table 220. Fast Extended Read Single Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Table 221. Fast Extended Read Single Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . 130
Table 222. Block security status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Table 223. Fast Extended Read Single Block response format when Error_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Table 224. Fast Read Multiple Block request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Table 225. Fast Read Multiple Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Table 226. Block security status if Option_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Table 227. Fast Read Multiple Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Table 228. Fast Extended Read Multiple Block request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Table 229. Fast Extended Read Multiple Block response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . 132
Table 230. Block security status if Option_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Table 231. Fast Read Multiple Block response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Table 232. Fast Write Message request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Table 233. Fast Write Message response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Table 234. Fast Write Message response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Table 235. Fast Read Message Length request format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Table 236. Fast Read Message Length response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Table 237. Fast Read Message Length response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Table 238. Fast Read Dynamic Configuration request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Table 239. Fast Read Dynamic Configuration response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . 136
Table 240. Fast Read Dynamic Configuration response format when Error_flag is set . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Table 241. Fast Write Dynamic Configuration request format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Table 242. Fast Write Dynamic Configuration response format when Error_flag is NOT set . . . . . . . . . . . . . . . . . . . . . . . 137
Table 243. Fast Write Dynamic Configuration response format when Error_flag is set. . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Table 244. UID format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Table 245. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Table 246. I²C operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Table 247. AC test measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Table 248. Input parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Table 249. I²C DC characteristics up to 85 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Table 250. I²C DC characteristics up to 125 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Table 251. I²C AC characteristics up to 85 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Table 252. I²C AC characteristics up to 125 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Table 253. GPO DC characteristics up to 85 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Table 254. GPO DC characteristics up to 125 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Table 255. GPO AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Table 256. RF characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Table 257. Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Table 258. Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Table 259. SO8N – Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Table 260. TSSOP8 – Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Table 261. UFDFN8 - Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Table 262. WLCSP - 10 balls, 1.649x1.483 mm, 0.4 mm pitch, wafer level chip scale mechanical data . . . . . . . . . . . . . . . 157
Table 263. WLCSP10 recommended PCB design rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Table 264. UFDFPN12 - Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Table 265. Ordering information scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Table 266. Device select usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Table 267. Byte Write in user memory when write operation allowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Table 268. Polling during programming after byte writing in user memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Table 269. Byte Write in user memory when write operation is not allowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Table 270. Byte Write in Dynamic Register (if not Read Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Table 271. Polling during programming after byte write in Dynamic Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Table 272. Byte Write in Dynamic Register if Read Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

DS13519 - Rev 6 page 198/202

 ST25DV04KC ST25DV16KC ST25DV64KC
List of tables

Table 273. Byte Write in mailbox when mailbox is free from RF message and fast transfer mode is activated . . . . . . . . . . 167
Table 274. Byte Write in mailbox when mailbox is not free from RF message fast transfer mode is not activated . . . . . . . . 167
Table 275. Byte Write in System memory if I2C security session is open and register is not RO . . . . . . . . . . . . . . . . . . . . 168
Table 276. Polling during programing after byte write in System memory if I2C security session is open and register is not RO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Table 277. Byte Write in System memory if I2C security session is closed or register is RO . . . . . . . . . . . . . . . . . . . . . . . 169
Table 278. Sequential write User memory when write operation allowed and all bytes belong to same area. . . . . . . . . . . . 169
Table 279. Polling during programing after sequential write in User memory when write operation allowed and all bytes belong
to same area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Table 280. Sequential write in User memory when write operation allowed and crossing over area border. . . . . . . . . . . . . 170
Table 281. Polling during programming after sequential write in User memory when write operation allowed and crossing over
area border . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Table 282. Sequential write in mailbox when mailbox is free from RF message and fast transfer mode is activated . . . . . . 171
Table 283. Polling during programing after sequential write in mailbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Table 284. Current byte Read in User memory if read operation allowed (depending on area protection and RF user security
session) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Table 285. Current Read in User memory if read operation not allowed (depending on area protection and RF user security
session) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Table 286. Random byte read in User memory if read operation allowed (depending on area protection and RF user security
session) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Table 287. Random byte read in User memory if operation not allowed (depending on area protection and RF user security)173
Table 288. Byte Read System memory (Static register or I2C Password after a valid Present I2C Password) . . . . . . . . . . . 174
Table 289. Random byte read in Dynamic registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Table 290. Sequential Read User memory if read operation allowed (depending on area protection and RF user security
session) and all bytes belong to the same area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Table 291. Sequential Read User memory if read operation allowed (depending on area protection and RF user security
session) but crossing area border . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Table 292. Sequential Read User memory if read operation allowed (depending on area protection and RF user security
session) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Table 293. Sequential in Read System memory (I2C security session open if reading I2C_PWD) . . . . . . . . . . . . . . . . . . . 178
Table 294. Sequential Read system memory when access is not granted (I2C password I2C_PWD) . . . . . . . . . . . . . . . . 179
Table 295. Sequential read in dynamic register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Table 296. Sequential read in Dynamic register and mailbox continuously if fast transfer mode is activated . . . . . . . . . . . . 181
Table 297. Sequential in mailbox if fast transfer mode is activated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Table 298. Sequential read in mailbox if fast transfer mode is not activated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Table 299. Write Password when I2C security session is already open and fast transfer mode is not activated. . . . . . . . . . 184
Table 300. Write Password when I2C security session is not open or fast transfer mode activated . . . . . . . . . . . . . . . . . . 185
Table 301. Present Password (whatever status of I2C security session or fast transfer mode) . . . . . . . . . . . . . . . . . . . . . 186
Table 302. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

DS13519 - Rev 6 page 199/202

 ST25DV04KC ST25DV16KC ST25DV64KC
List of figures

List of figures
Figure 1. ST25DVxxKC block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 2. ST25DVxxKC 8-pin SO8N package connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. ST25DVxxKC 8-pin TSSOP8 package connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 4. ST25DVxxKC 8-pin UFDFN8 package connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 5. 10-ball WLCSP package connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 6. ST25DVxxKC 12-pin UFDFPN12 package connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 7. ST25DVxxKC power-up sequence (No RF field, LPD pin tied to VSS or package without LPD pin). . . . . . . . . . . 9
Figure 8. ST25DVxxKC RF power-up sequence (No DC supply) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 9. Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 10. ST25DVxxKC user memory areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11. RF to I2C fast transfer mode operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 12. I2C to RF fast transfer mode operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 13. Fast transfer mode mailbox access management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 14. ST25DVxxKC, Arbitration between RF and I2C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 15. I²C “RFSwitchOff” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 16. I²C “RFSwitchOn” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 17. RF_USER chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 18. RF_ACTIVITY chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 19. RF_INTERRUPT chronogram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 20. FIELD_CHANGE chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 21. RF_PUT_MSG chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 22. RF_GET_MSG chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 23. RF_WRITE chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 24. GPO/I2C_WRITE chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 25. GPO/I2C_RF_OFF chronogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 26. EH delivery state diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 27. ST25DVxxKC Energy Harvesting Delivery Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 28. RF security sessions management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 29. I2C security sessions management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 30. I²C bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 31. I²C timeout on Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 32. Write mode sequences when write is not inhibited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 33. Write mode sequences when write is inhibited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 34. Write cycle polling flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Figure 35. Read mode sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Figure 36. I2C Present Password Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Figure 37. I2C Write Password Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Figure 38. ST25DVxxKC protocol timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 39. ST25DVxxKC state transition diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Figure 40. Stay Quiet frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Figure 41. Read Single Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 42. Extended Read Single Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . 90
Figure 43. Write Single Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 44. Extended Write Single frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Figure 45. Lock Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Figure 46. Extended Lock block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Figure 47. Read Multiple Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 48. Extended Read Multiple Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . 98
Figure 49. Write Multiple Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Figure 50. Extended Write Multiple Block frame exchange between VCD and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Figure 51. Select frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Figure 52. Reset to Ready frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

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 ST25DV04KC ST25DV16KC ST25DV64KC
List of figures

Figure 53. Write AFI frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Figure 54. Lock AFI frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Figure 55. Write DSFID frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Figure 56. Lock DSFID frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 57. Get System Info frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Figure 58. Extended Get System Info frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . . .112
Figure 59. Get Multiple Block Security Status frame exchange between VCD and . . . . . . . . . . . . . . . . . . . . . . . . . . . .114
Figure 60. Extended Get Multiple Block Security Status frame exchange between VCD and ST25DVxxKC . . . . . . . . . . .115
Figure 61. Read Configuration frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
Figure 62. Write Configuration exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Figure 63. Read Dynamic Configuration frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . .119
Figure 64. Write Dynamic Configuration frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . 120
Figure 65. Manage GPO frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Figure 66. Write Message frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Figure 67. Read Message Length frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . 123
Figure 68. Read Message frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Figure 69. Fast Read Message frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Figure 70. Write Password frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Figure 71. Present Password frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Figure 72. Fast Read Single Block frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . . . . 129
Figure 73. Fast Extended Read Single Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . 130
Figure 74. Fast Read Multiple Block frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . . . 132
Figure 75. Fast Extended Read Multiple Block frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . 133
Figure 76. Fast Write Message frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Figure 77. Fast Read Message Length frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . . . . . 135
Figure 78. Fast Read Dynamic configuration frame exchange between VCD and ST25DVxxKC. . . . . . . . . . . . . . . . . . 136
Figure 79. Fast Write Dynamic Configuration frame exchange between VCD and ST25DVxxKC . . . . . . . . . . . . . . . . . 138
Figure 80. AC test measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Figure 81. I²C AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Figure 82. I²C Fast mode (fC = 1 MHz): maximum Rbus value versus bus parasitic capacitance (Cbus) . . . . . . . . . . . . . 147
Figure 83. ASK modulated signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Figure 84. SO8N – Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Figure 85. SO8N - Footprint example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Figure 86. TSSOP8 – Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Figure 87. TSSOP8 – Footprint example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Figure 88. UFDFN8 - Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Figure 89. WLCSP - 10 balls, 1.649x1.483 mm, 0.4 mm pitch, wafer level chip scale package outline . . . . . . . . . . . . . . 157
Figure 90. WLCSP - 10 balls, 1.649x1.483 mm, 0.4 mm pitch, wafer level chip scale recommended footprint. . . . . . . . . 158
Figure 91. UFDFPN12 - Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Figure 92. Logic 0, high data rate, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Figure 93. Logic 1, high data rate, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Figure 94. Logic 0, low data rate, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Figure 95. Logic 1, low data rate, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Figure 96. Start of frame, high data rate, one subcarrier, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Figure 97. Start of frame, low data rate, one subcarrier, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Figure 98. End of frame, high data rate, one subcarrier, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Figure 99. End of frame, low data rate, one subcarrier, fast commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

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 ST25DV04KC ST25DV16KC ST25DV64KC

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DS13519 - Rev 6 page 202/202