Machine Translated by Google

Shenzhen Guoyun Technology Co., Ltd.

GA6_Hardware Specifications_V1.04
Machine Translated by Google

Document Name: GA6 Hardware Design Manual

Version: Date: 1.04

Status: Document 2017-1-18

Control Number: release

GA6_HD_CN_V1.04

foreword

Thanks for using the GA6 module provided by Guoyun. This product is a GPRS module. With standard AT command interface, it can provide GSM voice,

TTS, short message and TCP/IP data transmission. Please read the user manual carefully before use, you will appreciate its perfect functions and concise operation methods.

This module is mainly used for voice or data communication. The company does not assume the responsibility for property loss or personal injury caused by the user's abnormal operation.

appoint. Users are requested to develop corresponding products according to the technical specifications and reference designs in the manual. Also pay attention to the use of mobile products, especially GSM products

General safety considerations that should be addressed.

Before making a statement, the company has the right to modify the contents of this manual according to the needs of technological development.

Copyright Notice

The copyright of this manual belongs to Jinxun, and anyone who reproduces, cites or modifies this manual without the written consent of our company will bear legal responsibility.

GA6_HD_CN_V1.0 2 1.18.2017
4
Machine Translated by Google

content

Preface ..................................................................... ...................................................... ...................................................... ................................2

Table of Contents ................................ ...................................................... ...................................................... .................................................3
Version History ................................................ ...................................................... ...................................................... .................7 1
Introduction ..................................................... ...................................................... ...................................................... .................................8
1.1 Related Documents ................................ ...................................................... ...................................................... .................................
8 1.2 Terminology and Interpretation.... ...................................................... ...................................................... ...................................... ............
9 1.3 Safety Warnings ................................. ...................................................... ...................................................... ............ 11 2 GA6
Overview ............................................... ...................................................... ...................................................... ................................11 2.1 GA6
main features ................................ ...................................................... ...................................................... ................................ 12 2.2
GA6 functional block diagram ................................ ...................................................... ...................................................... ............ 14 3
Application Interfaces ................................. ...................................................... ...................................................... ................................15 3.1
GA6 Pin Description................................................ ...................................................... ...................................................... ................................
15 3.3 Power supply ................................ ...................................................... ...................................................... .................................
16 3.3.1 Power supply pins ................ ...................................................... ...................................................... ................................
18 3.4 Power on and off ............................................... ...................................................... ...................................................... ................................
18 3.4.1 GA6 booting up ................................ ...................................................... ...................................................... .................
18 3.4.2 GA6 Shutdown ................................ ...................................................... ...................................................... ........ 19 3.5
Module sleep wake-up function ................................ ...................................................... ............................................... 20 3.5.1 Module
SLEEP model................................................. ..................................................... ................................ 20 3.5.2 Module SLEEP
current ................................ ...................................................... ...................................................... ........ 20 3.5.3 The module
wakes up the master when it receives a phone call or SMS.......................... ...................................................... ................................20
3.6 GPIO, INT, UART and other interactive design points................................. ...................................................... .................................
21 3.7 Serial port...................... ...................................................... ...................................................... ...............................................21
3.7.1 Serial port function. ...................................................... ...................................................... ................................. 24 3.8
Audio Interface ............................... ...................................................... ...................................................... ................................. 24 3.8.1
Receiver interface circuit ...................... ...................................................... ...................................... ................................. 25 3.8.2
Earpiece output interface circuit................................ ...................................................... ...................................................... ...........26
3.8.3 Headphone receiver interface circuit ................................ ...................................................... ................................. 26 3.9
SIM card interface....... ...................................................... ...................................................... ................................. 27 3.9.1 SIM
Application ................................ ...................................................... ...................................................... ...............................................
27 3.9.2 SIM card holder selection ................................ ...................................................... ...................................................... .........
28 3.10 External reset input ............................................... ...................................................... ...................................................... 30 4
Antenna connector...................................................................... ...................................... ...................................................... ................................32
4.1 Module RF output power ................................................ ...................................................... ...................................................... ................
33 4.2 Module RF Receive Sensitivity ................................ ...................................................... ............................................... 33 4.3
Modules working frequency................................................ ...................................................... ................................. 33 5 Electrical,
reliability and radio frequency characteristics. ...................................................... ...................................................... ................................ 34
5.1 Absolute Maximum Values ................ ...................................................... ...................................................... ................................ 34

GA6_HD_CN_V1.0 4 3 1.18.2017
Machine Translated by Google

5.2 Operating temperature...................................................................... ...................................................... .................................................

34 5.3 Power Ratings...................................................................... ...................................................... ............................................... 35
5.4 Current consumption ...................................................... ...................................................... ...................................................... .....36
5.5 ESD Protection ................................................ ...................................................... ...................................................... ..... 37 6
Mechanical Dimensions ................................................ ...................................................... ...................................................... .................................38
6.1 Recommended Land Pattern for GA6................................. ...................................................... ...................................................... ......
38 6.2 GA6 Pin Assignment ................................ ...................................................... ...................................................... ... 39 6.3 GA6
Recommended Soldering Furnace Temperature Curve...................................... ...................................................... ................................. 40

GA6_HD_CN_V1.0 4 3 1.18.2017
Machine Translated by Google

Table Index

Table 1: Related Documents ............................................... ...................................................... ...................................................... .. 8

Table 2: Terms and Explanations ................................................ ...................................................... ................................................. 9
Table 3: GA6 Key Features................................................ ...................................................... ............................................... 12 Table
4: Encoding Formats and Maximum Networks Data Rates ..................................................................... ...................................................... .....13
Table 5: Pin Descriptions ............................................... ...................................................... ...................................................... .... 15
Table 6: Logic levels of the serial port ................................................ ...................................................... ...................................................... ...
22 Table 7: SIM card interface pin definition...................................... ...................................................... ...... ................................ 27
Table 8: Pin Descriptions (Amphenol SIM Card Holder)................ ...................................................... ...............................29 Table 9:
Pinouts Description (Molex SIM Card Holder)................................................. ...................................................... ................30 Table 10:
GA6 Conducted RF Output Power ................................................ ...................................................... ................................. 33 Table 11:
GA6 Conducted RF Receive Sensitivity. ...................................................... ...................................................... .................33 Table 12:
GA6 Operating Frequency Bands ................. ...................................................... ...................................................... ............... 33 Table
13: Absolute Maximum Values ................................. ...................................................... ...................................................... ... 34 Table
14: GA6 operating temperature ................................................ ...................................................... ...................................... ................
34 Table 15: GA6 Power Supply Ratings ................................ ...................................................... ...................................................... ...
35 Table 16: GA6 current consumption................................................ ...................................................... ......................................................
36 Table 17: Pin assignments................................................ ...................................................... ............................................... 40

GA6_HD_CN_V1.0 4 5 1.18.2017
Machine Translated by Google

Image Index

Figure 1: VBAT Bypass Capacitor Reference Circuit...................................... ...................................................... ...............................................

17 Figure 2: Power supply input reference design circuit ................................ ...................................................... ...................................................... ......17

Figure 3: Drop of VBAT during burst................................. ...................................................... ............................................... 18 Figure 4:

Minimum VBAT drop Voltage................................................. ...................................................... ................................. 18 Figure 5: Booting

with PWRKEY .................................. ...................................................... .................................................19 Figure 6: Power-on timing diagram

using PWRKEY................................................ ...................................................... .........................19 Figure 7: SMS wake up the master, RI

pin waveform ................................ ...................................................... ...................................................... 20 Figure 8: The phone wakes up

the master, the waveform of the RI pin...................... ...................................................... ............................................... 21 Figure 9: Data Wake

up the master, RI pin waveform ................................................ ...................................................... ................................ 21 Figure 10: Serial

Connection Diagram ................................ ...................................................... ...................................................... ............ 22 Figure 11: 5V to

3.0V Level Shifter Reference Design ................................ ...................................................... .................................23 Figure 12: RS232 Level

Conversion Circuit................................. ...................................................... ...................................................... .... 24 Figure 13: Receiver MIC

Interface Circuit...................................... ...................................................... ................................25 Figure 14: REC handset output

connector ................................ ...................................................... ...................................................... .................26 Figure 14: Headphone

Output Connector ................................................ ...................................................... ...................................................... ...... 27 Figure 15:

Recommended circuit for the interface of 8-pin SIM card holder ...................... ...................................................... .................................27

Figure 16: Recommended circuit for the interface of the 6-pin SIM card

holder...................................... ...................................................... ................................28 Figure 17: Amphenol C707 10M006 5122 SIM Card
Holder Dimensions picture................................................. ............................... 29 Figure 18: Molex 91228 SIM Card Holder Dimensional

Drawing.......... ...................................................... ...............................................30 Figure 19: Reset Timing

Diagram ...................................................... ...................................................... ............................................... 31 Figure 20: Reset Reference

Design Circuit... ...................................................... ...................................................... ................................. 31 Figure 21: GA6 Recommended

Land Pattern ................................ ...................................................... ...................................................... ............ 38 Figure 22: GA6 pinout

(top view)................................. ...................................................... ................................. 39 Figure 23: GA6 Recommended Soldering Oven Temperature Curve

GA6_HD_CN_V1.0 6 1.18.2017
4
Machine Translated by Google

Version history

Date Version Change Description 1.01 author

2016-08-3 First Release Bao

1

2016-11-1 Version 1.02, update NETLIGHT pin, DTR pin, RING pin information, Bao
7 Update 3.4.2 Shutdown method

2016-12-1 Version 1.03, add audio interface Bao

7

2017-1-18 1.04 3rd edition, add audio reference circuit Bao

GA6_HD_CN_V1.0 7 1.18.2017
4
Machine Translated by Google

1 Introduction

1.1 Related documents

This document describes the hardware application interface of GA6, including circuit connection and radio frequency interface in related applications. The application of GA6 is very

Broadly speaking, this document will detail all the features of the GA6.

This document can help users to quickly understand the detailed information of GA6 interface definition, electrical performance and structure size. In conjunction with this document and

For other GA6 application documents, users can quickly use GA6 to design mobile communication applications.

Table 1: Related Documentation

Serial number document Notes

name[1] ITU-T Draft new Serial asynchronous automatic dialing and control
recommendation V.25ter:
[2] GSM 07.07: Digital cellular telecommunications (Phase 2+); AT command
set for GSM Mobile Equipment (ME)
[3] GSM 07.10: Support GSM 07.10 multiplexing protocol
[4] GSM 07.05: Digital cellular telecommunications (Phase 2+); Use of Data
Terminal Equipment – Data Circuit terminating Equipment
(DTE – DCE) interface for Short Message Service (SMS) and
Cell Broadcast Service (CBS)
[5] GSM 11.14: Digital cellular telecommunications system (Phase 2+);
Specification of the SIM Application Toolkit for the
Subscriber Identity Module – Mobile Equipment (SIM – ME)
interface
[6] GSM 11.11: Digital cellular telecommunications system (Phase 2+);
Specification of the Subscriber Identity Module – Mobile
Equipment (SIM – ME) interface
[7] GSM 03.38: Digital cellular telecommunications system (Phase 2+);
Alphabets and language-specific information
[8] GSM 11.10 Digital cellular telecommunications system (Phase 2) ;

Mobile Station (MS) conformance specification; Part 1:

Conformance specification
[9] AN_Serial Port AN_Serial Port

GA6_HD_CN_V1.0 8 1.18.2017
4
Machine Translated by Google

1.2 Terms and explanations

Table 2: Terms and Explanations

the term explain

ADC Analog-to-Digital Converter

AMR Adaptive Multi-Rate
ARP Antenna Reference Point

ASIC Application Specific Integrated Circuit

BER Bit Error Rate

BTS Base Transceiver Station

CHAP Challenge Handshake Authentication Protocol

CS Coding Scheme
CSD Circuit Switched Data

CTS Clear to Send

DAC Digital-to-Analog Converter

DRX Discontinuous Reception
DSP Digital Signal Processor
DTE Data Terminal Equipment (typically computer, terminal, printer)
DTR Data Terminal Ready
DTX Discontinuous Transmission

EFR Enhanced Full Rate

EGSM Enhanced GSM

EMC Electromagnetic Compatibility

ESD Electrostatic Discharge
ETS European Telecommunication Standard
FCC Federal Communications Commission (US)
FDMA Frequency Division Multiple Access
FR Full Rate

GMSK Gaussian Minimum Shift Keying

GPRS General Packet Radio Service

GSM Global Standard for Mobile Communications

HR Half Rate

I/O Input/Output
IC Integrated Circuit
IMEI International Mobile Equipment Identity

kbps Kilo bits per second

the term explain

led Light Emitting Diode

GA6_HD_CN_V1.0 9 1.18.2017
4
Machine Translated by Google

Li-Ion Lithium-Ion

MO Mobile Originated
MS Mobile Station (GSM engine), also referred to as TE
MT Mobile Terminated

PAP Password Authentication Protocol

PBCCH Packet Switched Broadcast Control Channel

PCB Printed Circuit Board

PCS Personal Communication System, also referred to as GSM 1900

PDU Protocol Data Unit

PPP Point-to-point protocol

RF Radio Frequency
RMS Root Mean Square (value)
RTC Real Time Clock

RX Receive Direction

SIM Subscriber Identification Module

SMS Short Message Service

TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
TX Transmit Direction

UART Universal Asynchronous Receiver & Transmitter

URC Unsolicited Result Code

USSD Unstructured Supplementary Service Data

VSWR Voltage Standing Wave Ratio
Vmax Maximum Voltage Value
Vnorm Normal Voltage Value
Vmin Minimum Voltage Value
VIHmax Maximum Input High Level Voltage Value
VIHmin Minimum Input High Level Voltage Value
VILmax Maximum Input Low Level Voltage Value
VILmin Minimum Input Low Level Voltage Value
VImax Absolute Maximum Input Voltage Value
VImin Absolute Minimum Input Voltage Value
VOHmax Maximum Output High Level Voltage Value
VOHmin Minimum Output High Level Voltage Value
VOLmax Maximum Output Low Level Voltage Value
VOLmin Minimum Output Low Level Voltage Value

the term explain

Inorm Normal Current

Imax Maximum Load Current

Phonebook

GA6_HD_CN_V1.0 10 1.18.2017
4
Machine Translated by Google

abbreviations

FD SIM fix dialing phonebook

LD SIM last dialing phonebook (list of numbers most recently dialed)

MC Mobile Equipment list of unanswered MT calls (missed calls)

ON SIM (or ME) own numbers (MSISDNs) list

RC Mobile Equipment list of received calls

SM SIM phonebook

NC Not connect

1.3 Safety Warning

Pay attention to the following safety precautions when using or servicing any terminal or mobile phone that contains a GA6 module. terminal device should

When informing users of the following safety information. Otherwise, Jinxun will not be responsible for any consequences arising from the user's failure to follow these warnings.

When in hospital or near medical equipment, observe the restrictions on cell phone use. If necessary, please turn off the terminal or

mobile phone , otherwise the medical equipment may malfunction due to radio frequency interference.

Turn off the wireless terminal or mobile phone before boarding. To prevent interference with the communication system, the use of wireless

communication equipment is prohibited on board the aircraft. Ignoring the above will violate local laws and may result in a flight accident.

Do not use mobile terminals or cell phones in the presence of flammable gas. Turn off cell phone terminals when near explosive operations,

chemical plants, fuel depots, or gas stations. It is dangerous to operate the mobile terminal near any potentially explosive electrical

equipment .

When the mobile phone terminal is turned on, it will receive or transmit radio frequency energy. Interference with televisions, radios,

computers or other electrical equipment may occur when near them.

Road safety comes first! Do not use handheld terminals or mobile phones when driving vehicles, use hands-free devices. Park your

car before using a handheld terminal or mobile phone.

GSM mobile terminals operate under RF signals and cellular networks, but are not guaranteed to connect in all conditions.

For example, no call credit or an invalid SIM card. When you are in this situation and need emergency services, remember

to use the emergency number. In order to be able to make and receive calls, the mobile terminal must be turned on and

in a service area with a sufficiently strong mobile signal. Emergency calls are not allowed when certain network services

or phone functions are in use, such as feature lock, keypad lock. Disabling these functions before using an emergency

phone . Some networks require active SIM support.

2 GA6 Overview

GA6 is a 4-band GSM/GPRS module, the working frequency is: EGSM 900MHz, GSM850MHz and DCS 1800, PCS1900. GA6 supports GPRS multi-slot

class 10/ class 8 (optional) and GPRS coding formats CS-1, CS-2, CS-3 and CS-4.

The size of the module is only 22.8mm x 16.8mm x 2.2 mm, which can meet the space size requirements in almost all user applications, such as

M2M, data transmission system, etc.

GA6_HD_CN_V1.0 11 1.18.2017
4
Machine Translated by Google

The physical interface between the module and the user's mobile application is 42 SMD pad pins, which provide all the hardware interfaces of the application module.

GA6 is designed with power saving technology, so the minimum current consumption in SLEEP mode is only 0.9mA .

GA6 is embedded with TCP/IP protocol, and the extended TCP/IP AT command makes it convenient for users to use TCP/IP protocol, which is very important for users to do data transmission.

Very useful when applying.

Note: Please contact us if you need TTS.

2.1 Main Features of GA6

Table 3: GA6 Key Features

Feature instruction

power supply Single Voltage: 3.5V – 4.2V

power saving Current consumption in SLEEP mode is 0.9mA

frequency band ÿQuad frequency: GSM850, EGSM 900 and DCS 1800, PCS1900 can automatically search

four frequency bands.

ÿCompliant with GSM Phase 2/2+

GSM type small mobile station

transmit power ÿ Class 4 (2W): EGSM 900 / GSM850

ÿ Class 1 (1W): DCS 1800 / PCS1900

GPRS connection features ÿ GPRS multi-slot class 10 (default)

ÿ GPRS multi-slot class 8 (optional)
~
temperature range ÿNormal operating temperature: -30°C +80°C
~ ~
ÿRestricted operating temperature: -30°C and +80°C +85°C*
~
-40°C ÿStorage temperature: -45°C +90°C

GA6_HD_CN_V1.0 12 1.18.2017
4
Machine Translated by Google

characteristic instruction

GPRS data characteristics ÿ GPRS data downlink transmission: maximum 85.6 kbps
ÿ GPRS data upstream transmission: maximum 42.8 kbps

Circuit Switched (CSD) ÿEncoding formats: CS-1, CS-2, CS-3 and CS-4
ÿSupports the PAP (Password Authentication Protocol) protocol commonly used for PPP connections

ÿ Embedded TCP/IP protocol

ÿSupport Packet Broadcast Control Channel (PBCCH)

ÿ CSD transfer rate: 2.4, 4.8, 9.6, 14.4 kbps

ÿSupport Unstructured Supplementary Data Service (USSD)·

Short Message (SMS) ÿ MT, MO, CB, Text and PDU modes
ÿShort message (SMS) storage device: SIM card

SIM card interface Supported SIM Cards: 1.8V, 3V

antenna interface GSM antenna pins

serial port and debugging port serial port:

ÿSupport 4-wire serial port

ÿTransmission rate support from 2400bps to 115200bps

ÿCan send AT commands and data through the serial port

ÿSupport RTS/CTS hardware flow control, and can open or close the flow control function through software

can

ÿSupport serial port multiplexing function in accordance with GSM 07.10 protocol

ÿSupport 115200bps automatic baud rate detection function

Debug port:

ÿFor debugging and software upgrade

Contacts Support types: SM, FD, LD, ON,.

Management SIM Application Toolkit supports SAT class 3, GSM 11.14 Release 99

Real Time Clock (RTC) support

Timing function is set by AT command

Mechanical Dimensions Dimensions: 22.8mm x 16.8mm x 2.2 mm

Weight: 7g

Software upgrade Upgrade software through the debug port

* GA6 will work, but some RF performance may exceed GSM specifications.

Table 4: Encoding Formats and Maximum Network Data Rates

Feature instruction

encoding format 1 Timeslot 2 Timeslot 4 Timeslot

CS-1: 9.05kbps 18.1kbps 36.2kbps

CS-2: 13.4kbps 26.8kbps 53.6kbps

CS-3: 15.6kbps 31.2kbps 62.4kbps

CS-4: 21.4kbps 42.8kbps 85.6kbps

GA6_HD_CN_V1.0 13 1.18.2017
4
Machine Translated by Google

2.2 GA6 functional block diagram

The following figure lists the main functional parts of the

module: ÿ GSM baseband ÿ GSM radio frequency ÿ

Antenna interface ÿ Other interfaces

GA6_HD_CN_V1.0 14 1.18.2017
4
Machine Translated by Google

3 Application interface

The GA6 is connected to the mobile application platform via 42 SMD pins. The following sections describe each interface function in detail:

ÿPower supply (please refer to 3.3)

ÿSerial port (please refer to 3.7)

ÿ SIM card interface (please refer to 3.8)

Please refer to Chapter 5 for electrical characteristics and mechanical dimensions

3.1 GA6 pin description

Table 5: Pin Descriptions

power supply

pin name Serial I/O Description Module DC characteristics Remark

operates on a single power supply

Power through 2 VBAT power Vmax= 4.2V
VBAT 41,42 I source pin power supply, voltage range Vmin=3.5V
Range: 3.5V-4.2V, electrical Vnorm=4.0V
Flow > 2A

After the module is powered on, it will

VDD_EXT 37 O Provide this 3V power output;

Power supply capability is 100mA

13,18,22,

GND 25,28,34, ground

36,39,40,

Power on and off

Power-on button, >1.9V and above

It can be turned on after 2s;

Inside the module
After booting, the foot keeps breaking
10K pulldown, so
PWR_EN 8 I can be open; this pin only needs to provide provide on demand

voltage, not certain drive

ability.
Power supply needs to be considered

serial port

AT_UART_CTS 10 O send clear I send 3.0V

AT_UART_RTS 11 request 3.0V

AT_UART_RXD 31 I send input O send output 3.0V

AT_UART_TXD 30 3.0V

AT_UART_DTR 9 I Data Terminal Ready 3.0V

AT_UART_RING 7 O Ringing indication 3.0V

SIM card interface

SIM_VDD 16 O SIM card power SIM card

SIM_RST 14 O SIM card reset signal all signals

SIM_CLK 15 O SIM card clock signal line should be connected

GA6_HD_CN_V1.0 15 1.18.2017
4
Machine Translated by Google

SIM_DATA 17 I/O SIM card data signal

Indicator light interface

When not registered: on for 100MS and off for 700MS;

NETLIGHT 6 O Network indicator Register to the network: on for 100MS off
1900MS; Connect to the server: 100MS
Off 100MS
External reset

appears in the module

In exceptional circumstances,

Pull down to put

Module shutdown
RST 12 I External reset input (low power
Internally already
effective)
2.8V pull-up,

Pay attention to the voltage domain

Different to divide the pressure

design

Antenna interface

GSM_RF 35 GSM antenna interface

debug serial port

HST_RXD 32 I debug serial input 3.0V

HST_TXD 33 O Debug serial port output 3.0V

audio interface
EAR_L twenty three
O Headphone left channel

EAR_R twenty four

O Headphone right channel

REC+ 26 O speaker positive

REC- 27 O Speaker negative

MIC- 19 I MIC negative

MIC+ 20 I MIC positive

reserved

1, 2, 3, 4 ,
Reserved 5 21
, 29, ,
38,

3.3 Power supply

The GA6 is powered by a single power supply, the voltage input range of VBAT is from 3.5V to 4.2V, and the recommended voltage is 4.0V. The burst transmitted by the module will lead to

When the voltage drops, the peak value of the current will reach up to 2A. Therefore, the current supply capacity of the power supply cannot be less than 2A.

GA6_HD_CN_V1.0 16 1.18.2017
4
Machine Translated by Google

A bypass capacitor close to VBAT is recommended, a 100µF, low ESR capacitor is recommended. It is also possible to use a 100 µF tantalum capacitor (low ESR) in parallel with
~
a (1µF 10µF) ceramic capacitor to reduce
is shown cost, and
in the figure the capacitor should be placed as close as possible to the VBAT pin of the module during PCB layout. The recommended circuit
below:

Figure 1: VBAT Bypass Capacitor Reference Circuit

The following figure is a reference design circuit with a DC input voltage of +5V. Because the output of the design is 4V, it can be implemented with a linear regulator. If the voltage

difference between input and output (VBAT) is large, a switching regulator should be used. Especially when the current reaches 2A when the module bursts, the efficiency advantage

of the switching regulator is obvious. The module can be powered directly by a 3.6V lithium-ion battery, or by a nickel-cadmium or nickel-manganese battery, but please note that

the maximum voltage cannot exceed the maximum voltage of the module, otherwise the module will be damaged.

Figure 2: Power supply input reference design

circuit The figure below shows the drop of VBAT when VBAT is equal to 4V and the maximum transmit power. Test Conditions: The maximum output current of VBAT is equal to

2A, CA is a 100µF tantalum capacitor, ESR is equal to 0.7 ohms, and CB is equal to 1µF.

GA6_HD_CN_V1.0 17 1.18.2017
4
Machine Translated by Google

Figure 3: Drop of VBAT during burst

3.3.1 Power pins

Two VBAT pins are used for power input, and 9 GND pins are used for grounding. In the user's design, please pay special attention to the design of the power supply part to ensure

that even when the current consumption of the module reaches 2A, the drop of VBAT will not be lower than 3.3V. If the voltage drops below 3.3V, the module may shut down. The PCB

trace from the VBAT pin to the power supply should be wide enough to reduce voltage droop during transmission burst mode.

Figure 4: Minimum voltage at which VBAT drops

3.4 Power on and off

Do not turn on the module when the temperature and voltage limits described in Section 3.4.2 are exceeded. The module shuts down as soon as it detects these unsuitable conditions.

In extreme cases such operations can lead to permanent damage to the module.

3.4.1 GA6 boot

The following chapters describe how to boot the GA6:

ÿUse the PWRKEY pin

Using the PWRKEY pin to turn on the module (Power On) The

user powers on by pulling the PWRKEY signal high for at least 2 seconds and then releasing it. This pin has been pulled down to GND internally in the module. The recommended circuit is as follows:

GA6_HD_CN_V1.0 18 1.18.2017
4
Machine Translated by Google

Figure 5: Using the PWRKEY button to power on

The following figure shows the boot sequence description:

Figure 6: Boot sequence diagram using PWRKEY

3.4.2 GA6 shutdown

The following are several ways to shut down the GA6:

ÿUse PWRKEY pin to shut down

The user can turn off the module by pulling PWRKEY high for 2S and then releasing it. The shutdown circuit can refer to the design of the power-on circuit. after shutdown
The AT serial port will report: "POWEROF OK "

ÿUsing AT command to shut down the user can

To shut down by AT command. shutdown

"
The AT command isAT+CPOF
"
" After shutdown, it will be reported on the AT serial port:" +CPOF: MSOF OK

GA6_HD_CN_V1.0 19 1.18.2017
4
Machine Translated by Google

3.5 Module sleep wake-up function

3.5.1 Module SLEEP Mode

Put the system into SLEEP mode by pulling the DTR pin low, wake up the system by pulling the DTR pin high

3.5.2 Module SLEEP current

3. GSM real network Sleep current consumption (unit: mA)

no card move Unicom

Minimum current 0.9 0.98 0.97

average current 3.1 3.3 3.4

3.5.3 The module wakes up the master when it receives a call or SMS

The module wakes up the master through the RI pin;

1) SMS wake up the master, RI pin will pull 3 low pulses of 100ms, RI pin waveform is as follows:

Figure 7: SMS wake up the master, RI pin waveform

1) The phone wakes up the master, and the RI pin will continue to pull a low pulse of 250ms and a high pulse of 3750ms until the phone hangs up or is connected, and the RI pin pulses

The shape is as follows:

GA6_HD_CN_V1.0 20 1.18.2017
4
Machine Translated by Google

Figure 8: The phone wakes up the master, RI pin waveform

Figure 9: Data wake-up master, RI pin waveform

3.6 GPIO, INT, UART and other interactive design points

Because the module uses a 3.0V IO power supply system, the maximum input limit voltage of all IO ports cannot exceed 3.3V, otherwise

The IO port of the module may be damaged. The output voltage of the IO port under the 3.3V power supply system, due to the incompleteness of signal integrity design and other aspects

Good, the output voltage of the IO port is likely to cause the IO output to actually exceed 3.3V due to overshoot, and sometimes even

When it reaches 3.5V, the 3.3V IO signal at this time is directly connected to the IO of the 3.0V system of the module, which may damage the IO pins of the module. This

When it is necessary to increase the series resistance and parallel capacitance and other design measures.

pin name pin number I/O function Voltage Domain Notes

PWRKEY 8 I AP_PWR_ON_OFF_BP Module power on

RST 12 I AP_PWR_OFF_BP 3.0V Module reset

TXD 30 O data sending 3.0V data sending
RXD 31 I data reception 3.0V data reception
Auxiliary Enhancement Control Signal

In order to enhance the more reliable communication between the AP and the module, it is recommended that when the AP has redundant GPIO or interface resources, add the

on these interfaces.

Pin name Pin No. I/O Function 11 Voltage Domain Notes

RTS I UART_RTS 3.0V Hardware flow control for UART

CTS 10 O UART_CTS 3.0V Hardware flow control for UART

3.7 Serial port

serial port

RXD 31 I data reception 3.0V

GA6_HD_CN_V1.0 twenty one 1.18.2017

4
Machine Translated by Google

TXD 30 O data sending 3.0V

RTS 11 I send request 3.0V
CTS 10 O send clear 3.0V 0

Table 6: Serial Port Pin Definitions

Figure 10: Serial connection diagram

Serial port:

ÿ TXD: Send data to the RXD signal line of the DTE device.
ÿ RXD: Receive data from the TXD signal line of the DTE device.

The serial port logic levels are described in the table below.

Table 6: Logic Levels for Serial Ports

parameter minimum maximum unit

VIL 0 0.7 V

VIH 2.1 3.3 V

VOL 0 0.4 V

-
VOH 2.4 V

When the level of the host serial port is 5V, the level conversion needs to be performed when connecting with the module serial port. It is recommended to use the level conversion of FAIRCHILD company.

Chip NC7WZ07, the following is the reference design circuit diagram.

GA6_HD_CN_V1.0 twenty two 1.18.2017

4
Machine Translated by Google

Figure 11: 5V to 3.0V level conversion circuit reference design When

using the UART port of the GA6 module to communicate with a PC or MCU, please pay attention to the TX and RX

directions, especially the GA6 UART port only supports 3.0V voltage, so For external UARTs other than 3.0V, level

shifting is required, and the usual practice is to use diodes or triodes to achieve level shifting. It can also be implemented using level shift

chips. As shown in the figure, the transistor and the resistor realize 1.8V/3.0V level conversion. The resistance in the figure is only for

illustration. Please recalculate it according to the actual needs when designing.

GA6_HD_CN_V1.0 twenty three 1.18.2017

4
Machine Translated by Google

3.7.1 Serial port function

serial port

ÿSupport Modem devices

ÿContains data signal lines TXD and RXD, and status signal lines RTS and CTS. ÿThe

serial port can be used for GPRS service, receiving AT command control module. It can also be used for serial port multiplexing.

ÿ GA6 only supports basic multiplexing mode.

The communication baud rates supported by the serial port are as follows:

2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200bps.

The serial port does not support RS232 level, only CMOS level. See Table 9 for level information. A must be added between DCE and DTE

level shifting IC. If you are connecting to a computer, please refer to the image below.

Figure 12: RS232 level conversion circuit

3.8 Audio Interface

audio port

EAR_L twenty three

O Headphone left channel

EAR_R twenty four

O Headphone right channel

REC+ 26 O speaker positive

REC- 27 O Speaker negative

MIC- 19 I MIC negative

MIC+ 20 I MIC positive

GA6_HD_CN_V1.0 twenty four 1.18.2017

4
Machine Translated by Google

The module provides 1 analog audio input channel which can be used to connect a microphone. When using a microphone for the audio input, an electret microphone is

recommended. The audio output is used to connect the receiver, and it can only drive the maximum 32 ohm receiver. It is recommended that the user choose the following

circuit according to the actual application to get a better sound effect. Note that the REC+/REC- audio signal line is a differential signal, which needs to be fully considered

during PCB layout. As shown below. If you need to choose audio amplifier circuit, it is recommended to use LM4890 from National Company. In addition, the module also

provides a headphone earpiece audio port

3.8.1 Receiver interface circuit

Figure 13: Receiver MIC interface circuit

GA6_HD_CN_V1.0 25 1.18.2017
4
Machine Translated by Google

3.8.2 Earpiece output interface circuit

Figure 14: REC handset output interface

3.8.3 Headphone receiver interface circuit

GA6_HD_CN_V1.0 26 1.18.2017
4
Machine Translated by Google

Figure 15: Headphone handset output interface

3.9 SIM card interface

3.9.1 SIM Application

The SIM card interface of the module supports the GSM Phase 1 specification, as well as the new GSM Phase 2+ specification and the FAST 64 kbps SIM card (with

in SIM Application Toolkit).

1.8V and 3.0V SIM cards are supported.

The interface power supply of the SIM card is provided by the voltage regulator inside the module, the normal voltage is 2.8V or .

1.8V Table 7: SIM card interface pin definition

Pin Name pin number Features

SIM_DATA 17 SIM card data I/O

SIM_CLK 15 SIM card clock

SIM_RST 14 SIM card reset

SIM_VDD 16 SIM power supply, automatically select output according to the type of SIM card

voltage, can be 3.0V±10%

Or at 1.8V±10%, the output current is about 10mA.

The following figure is the recommended interface circuit of SIM card. To protect the SIM card, it is recommended to use ST ( www.st.com ) ESDA6V1W5 or ON SEMI

(www.onsemi.com ) SMF05C for ESD protection. In the figure below, the 22ÿ resistor in the IO port line is used to match the module and SIM card

The impedance between the data signal line SIM_DATA has been pulled up inside the module. Devices of the peripheral circuit of the SIM card should be close to the SIM card holder.

The recommended circuit of the 8-pin card holder is as follows:

Figure 16: Recommended circuit for interface of 8-pin SIM card holder

GA6_HD_CN_V1.0 27 1.18.2017
4
Machine Translated by Google

SIM_PRESENCE is floating.

The interface circuit of the 6 -pin SIM card holder is as follows:

GA6_HD_CN_V1.0 27 1.18.2017
4
Machine Translated by Google

Figure 17: Recommended circuit for interface of 6-pin SIM card holder

Hardware design

suggestion: Independent TVS tube can be used here, and it can be used as appropriate according to the actual ESD

test situation. If the ESD is good and the TVS tube is not needed, please use a 22pF~33pF decoupling capacitor for the TVS position to improve the anti-RF

interference capability of the SIM card. If the ESD test comes down, the TVS tube is indispensable, please use the TVS tube with the capacitance value not

exceeding 50pF. The 22R resistor can be added or removed as appropriate according to the actual test situation. The following figure shows a concise

reference design for verification

3.9.2 Selection of SIM Card Holder

For a 6-pin SIM card holder, Amphenol C707 10M006 5122 is recommended. Please visit http://www.amphenol.com webpage

GA6_HD_CN_V1.0 28 1.18.2017
4
Machine Translated by Google

to know more information!

Figure 18: Dimensions of Amphenol C707 10M006 5122 SIM card holder

Table 8: Pin Description (Amphenol SIM Card Holder)

Pin Name Signal Description

C1 SIM_VDD SIM power supply, the output voltage is automatically selected according to the type of SIM card.

Think 3.0V±10% or

is 1.8V±10%, and the output current is about 10mA.

C2 SIM_RST SIM card reset

C3 SIM_CLK SIM card clock

C5 GND ground

C6 VPP not connected

C7 SIM_DATA SIM card data I/O

8-pin SIM card holder, Molex 91228 is recommended. Please visit http://www.molex.com for more information.

GA6_HD_CN_V1.0 29 1.18.2017
4
Machine Translated by Google

Figure 19: Molex 91228 SIM Card Holder Dimensions

Table 9: Pin Description (Molex SIM Card Holder)

Pin Name Signal Description

C1 SIM_VDD SIM power supply, the output voltage is automatically selected according to the type of SIM card, which can be 3.0V±10%

Or at 1.8V±10%, the output current is about 10mA.

C2 SIM_RST SIM card reset

C3 SIM_CLK SIM card clock

C4 GND ground

C5 GND ground

C6 VPP not connected

C7 SIM_DATA SIM card data I/O

C8 SIM_PRESENCE SIM card insertion and removal detection (floating)

3.10 External reset input

The device can be put into reset state through the external reset pin NRESET. This signal is only used for emergency reset, such as the module cannot respond to AT

command, or a graceful shutdown is not possible. The module will be reset when the NRESET pin is low, this pin has been pulled up internally. should be in

A decoupling capacitor is connected to the NRESET pin in parallel to prevent interference. After RESET, you need to press the power button again to restart the module.

GA6_HD_CN_V1.0 30 1.18.2017
4
Machine Translated by Google

Figure 20: Reset Timing Diagram

Reset recommended design circuit:

Figure 21: Reset reference design circuit

GA6_HD_CN_V1.0 31 1.18.2017
4
Machine Translated by Google

4 Antenna ports

The module provides an antenna interface pin. The antenna on the user's motherboard should be connected to the module's antenna pin using a microstrip

line or other types of RF traces (the impedance should be controlled to be 50 ohms). In order to facilitate antenna debugging and certification testing, an RF

connector and antenna matching network should be added. The recommended circuit diagram is as follows: It is recommended to reserve a PI type matching

circuit for the GSM_ANT of the module.

GA6_HD_CN_V1.0 32 1.18.2017
4
Machine Translated by Google

4.1 Module RF output power

Table 10: GA6 Conducted RF Output Power

frequency band maximum minimum

EGSM900 / GSM850 33dBm ±2dB 5dBm± 5dB

DCS1800 / PCS1900 30dBm ±2dB 0dBm± 5dB

4.2 Module RF Receive Sensitivity

Table 11: GA6 Conducted RF Receive Sensitivity

frequency band Receive Sensitivity (Typical) Receive Sensitivity (Maximum)

EGSM900/GSM850 < -109dBm < -107dBm

DCS1800/PCS1900 < -109dBm < -107dBm

4.3 Module operating frequency

Table 12: GA6 operating frequency bands

frequency band take over emission

EGSM900/GSM850 925ÿ960MHz 880ÿ915MHz

DCS1800/PCS1900 1805ÿ1880MHz 1710ÿ1785MHz

GA6_HD_CN_V1.0 33 1.18.2017
4
Machine Translated by Google

5 Electrical, reliability and RF characteristics

5.1 Absolute Maximum

The following table shows the status of the absolute maximum value under abnormal operating conditions. Exceeding these limits may result in permanent damage to the module.

Table 13: Absolute Maximum Values

parameter minimum maximum unit

-
VBAT 4.2 V

Peak current of power supply 0 3.0 A

Voltage at digit pins* -0.3 3.3 V

-
Ii* 10 mA
-
Io* 10 mA

* Suitable for digital interfaces such as: GPIO, I2C, UART, LCD.

5.2 Operating temperature

The following table shows the operating temperature range of the module:

Table 14: GA6 Operating Temperature

minimum typical maximum unit

Parameters -30 +25 +80 °C

Operating Temperature Limited Operating Temperature* -40 +80 to +85 ÿ

to -30 Storage Temperature -45 +90 °C

* GA6 will work, but some RF performance may exceed GSM specifications.

GA6_HD_CN_V1.0 34 1.18.2017
4
Machine Translated by Google

5.3 Power Ratings

Table 15: GA6 Power Supply Ratings

Parameter Description The Minimum Typical Maximum Unit

Supply Voltage conditional voltage must be between the maximum and minimum values, including 3.5 4.0 4.2 V

Sudden momentary drops and ripples

Transmit moment voltage Typical conditions, maximum RF output power 300mV

fall

Voltage ripple Typical conditions, maximum RF output power 502 mV

@f<200kHz
VBAT
@f>200kHz

peak current Power control at maximum output power 2.0 A

GA6_HD_CN_V1.0 35 1.18.2017
4
Machine Translated by Google

5.4 Current consumption

Please refer to the current values in the table below.

Table 16: GA6 current consumption

1. Power consumption test under different RF power (wake state)

GSM900 Power DCS1800 power consumption

ARFCN Consumption (mA) ARFCN Power consumption (mA)

5 247.6 0 195
6 234 1 172.6
7 190.1 2 146
8 177.3 3 130
9 154.3 4 117.6
10 138.3 5 108
11 124.2 6 100.4
12 114 7 94
13 105.1 8 89.8
14 98.1 9 85.7
15 93 10 83
16 88.4 11 81.3
17 85.7 12 79.5
18 83.2 13 78.6
19 80.8 14 77.8
15 77.3

2. Turn-on current of different voltages (under the maximum power of CMU, TALK mode (mA))

Voltage 1# current consumption 2# current consumption 3# current consumption 4# Current consumption

3.8 247.1 245.3 248.5 247.7

4 242.9 239.7 244.2 243.8
4.2 249.5 248.6 249.4 248.7
AVG 246.5 244.5333333 247.3666667 246.7333333

3. GSM real network Sleep current consumption (unit: mA)

1# Current consumption (no card) 2# Current consumption (mobile) 3# Current consumption (Unicom)

Minimum current 0.9 0.98 0.97

average current 3.1 3.3 3.4

4. GPRS current consumption in different modes when connected to CMU (unit: mA)

GA6_HD_CN_V1.0 36 1.18.2017
4
Machine Translated by Google

3Rx 2Tx
GSM(P5,C62) DCS(P0,C698)

Voltage current consumption Voltage current consumption

1 3.6 280.5 3.6 211.2

2 3.8 278.3 3.8 218.4
AVR 279.4 214.8

4Rx 1Tx
GSM(P5,C62) DCS(P0,C698)

Voltage current consumption Voltage current consumption

1 3.6 285.3 3.6 210.2

2 3.8 276.5 3.8 219.4
AVR 280.9 214.8

5.5 ESD Protection

The modules are not specifically protected against electrostatic discharge. Therefore, users need to take some appropriate protective measures for the module in use. in production, assembly and

Proper electrostatic protection must be observed when handling the module.

GA6_HD_CN_V1.0 37 1.18.2017
4
Machine Translated by Google

6 Mechanical Dimensions

This chapter describes the mechanical dimensions of the GA6.

6.1 Recommended Land Map for GA6

Figure 22: GA6 Recommended Land Map

GA6_HD_CN_V1.0 38 1.18.2017
4
Machine Translated by Google

6.2 GA6 pin assignment

Figure 23: GA6 pinout (top view)

GA6_HD_CN_V1.0 39 1.18.2017
4
Machine Translated by Google

Table 17: Pin Assignments

pin number pin name pin number pin name

RESERVED 22 GND

12 RESERVED 23 EAR_L
3 NC twenty four
EAR_R
4 NC 25 GND

5 NC 26 REC+

6 NETLIGHT 27 REC

7 RING 28 GND

8 PWRKEY 29 NC

9 DTR 30 TXD

10 CTS 31 RXD

11 RTS 32 HST_RXD
12 RST 33 HST_TXD
13 GND 34 GND

14 SIM_RST 35 GSM_RF
15 SIM_CLK 36 GND

16 SIM_VDD 37 VDD_EXT

17 SIM_DATA 38 NC

18 GND 39 GND

19 MIC- 40 GND

20 MIC+ 41 VBAT

twenty one NC 42 VBAT

6.3 GA6 Recommended Soldering Furnace Temperature Curve

GA6_HD_CN_V1.0 40 1.18.2017
4
Machine Translated by Google

Figure 24: Recommended soldering furnace temperature curve for GA6

GA6_HD_CN_V1.0 40 1.18.2017
4
Machine Translated by Google

GA6_HD_CN_V1.0 41 1.18.2017
4