Micro-Star International Co.

, Ltd

MS-6877
WLAN 802.11b/g Mini-Card
Product Specification
(Single antenna)

ECS P/N: 76G096877-11

PCB Version: 10
Prepared by: Eason Shen
Checked by: Aire Chien
Approved by: Aire Chien

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REVISION HISTORY

EDITION # DESCRIPTION ISSUE DATE AUTHOR

0.A Initial Release October 06, 2005 Eason Shen

0.B 1st Release January 27, 2006 Eason Shen
0.C 2nd Release March 15, 2006 Eason Shen

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CONTENT
1. Introduction............................................................................................................................................. 4
1.1 Features & Benefits................................................................................................................. 4
1.2 Applications ................................................................................................................................ 4
2. Product Specifications ......................................................................................................................... 5
2.1 General Specification.............................................................................................................. 5
2.2 Special Pins................................................................................................................................ 7
3. Hardware .................................................................................................................................................. 8
3.1 Hardware Architecture ........................................................................................................... 8
3.2 Chip Information ...................................................................................................................... 8
3.3 Pin Definition ............................................................................................................................. 9
4. Software ................................................................................................................................................. 12
4.1 Software Version.................................................................................................................... 12
4.2 Operating System Support ................................................................................................ 12
4.3 Security...................................................................................................................................... 12
5. Test Result............................................................................................................................................ 13
5.1 RF Test....................................................................................................................................... 13
6. Appearance........................................................................................................................................... 14
6.1 Shielding Case Mechanical Drawing ............................................................................... 15
7. Packaging.............................................................................................................................................. 16
8. Certification .......................................................................................................................................... 17

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1. Introduction
MSI Wi-Fi mini-Card, MN54G, is a mini-card, being used to integrate with such systems as notebook,
mini-barebone, portable PC…etc. With MSI MN54G embedded inside, a system could provide users with
the ability and flexibility to connect up to Internet wirelessly via Wi-Fi with speed up to 54Mbps.

1.1 Features & Benefits

Data Rate up to 54Mbps.

OFDM, DSSS, DBPSK, DQPSK and CCK modulation

Compliant with IEEE 802.11b and 802.11g (2.4GHz)

Superior equalizer for multi-path fading and Doppler effect compensation

Adjacent channel interference rejection support

Antenna selection Fix to main

Support short preamble

TX auto rate selection support

802.11i robust security support
 AES
 WEP
 TKIP + 802.1X
 WPA (Wi-Fi Protected Access)
 WPA2 (Wi-Fi Protected Access 2)

WMM (Wi-Fi Multi-Media) and QoS (Quality of Service) support

Site survey tool enables automatic detection of nearby APs and signal strength

Real-time diagnosis of signal quality from easily-readable LED

Outdoor operating range up to 400m

1.2 Applications

Home networking for device sharing

Wireless office for extension Ethernet range
Mobile networking for notebook, PC, and mini-barebone etc.

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2. Product Specifications

2.1 General Specification

General specification

Network Standard IEEE 802.11

IEEE 802.11b
IEEE 802.11g

Frequency Band 2.400-2.4835 GHz

Data Rate IEEE 802.11g (auto-fallback):

- OFDM: 54, 48, 36, 24, 18, 12, 9 and 6 Mbps
IEEE 802.11b (auto-fallback):
- CCK: 11, 5.5 Mbps
- DQPSK: 2 Mbps
- DBPSK: 1 Mbps

Media Access Control CSMA/CA with ACK

Channel IEEE 802.11g IEEE 802.11b

Ch. 1-11 – N. America Ch. 1-11 – N. America

Ch. 1-13 – Japan Ch. 1-1
– Japan

Ch. 1-13– Europe ETSI Ch. 1-13– Europe ETSI

Ch. 10-11 – Spain Ch. 10-11 – Spain

Ch. 10-13 – France Ch. 10-13 – France

Transmission IEEE 802.11b (DSSS)IEEE 802.11g (OFDM)

Modulation IEEE 802.11b (DSSS): IEEE 802.11g (OFDM):

CCK @ 11, 5.5 Mbps BPSK @ 6, 9 Mbps
DQPSK @ 2 Mbps QPSK @ 12, 18 Mbps
DBPSK @ 1 Mbps 16-QAM @ 24, 36 Mbps
64-QAM @ 48, 54 Mbps

Network Architecture Ad-Hoc Mode (Peer-to-Peer)

Infrastructure Mode

Antenna Type Two antenna connectors, Fix to main

Temperature Operating Temperature 0° to 80°C

Storage Temperature -20° to 100°C

Humidity 10%-90% (non-condensing)

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Power Consumption 802.11g (54Mbps) 802.11b(11Mbps)

370mA@3.3V in continue Tx 420mA@3.3V in continue Tx

300mA@3.3V in continue Rx 280mA@3.3V in continue Rx

190mA@3.3V in Standby mode

Dimensions 50.95*30*3.3mm

Weight 6.5g

Operating Voltage 3.3V +/- 10%

Output Power 802.11g 802.11b

54Mbps 14.0+2/-1 dBm 11Mbps 17.5+/-2 dBm

Receiver Sensitivity (Typical Value)
54 Mbps OFDM @ 10% PER = -65 dBm

11 Mbps CCK @ 8% PER = -80 dBm

Range Up to 400m (outdoor operating range)

Security 64/128-bit WEP, WPA, WPA2, TKIP, AES, 802.1x

Operating System Windows 98SE/2000/ME/XP/XP-64bit

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2.2 Special Pins

Special Pin Definition for Mini Card Interface

PIN# Name Active level Behavior Meaning Driving
current
PIN2 +3.3V +3.3V VCC input, according to Mini Card specification
(Input)
PIN4, 50 GND GND
PIN52 +3.3V +3.3V VCC input, according to Mini Card specification
(Input)
PIN35 Wi-Fi Module GND
Detecting
PIN 36 USB D- USB differential pair negative signal.
(Bidirectional)
PIN 38 USB D+ USB differential pair positive signal.
(Bidirectional)
PIN20 HW_Radio_Off# High (>2.0V) Radio Enable Normal 1mA/3.3V
(Input) (Active low) (Default value) Operation sink to
Low (< 0.8V) Radio Disable Disable Radio ground
PIN44 Radio Active LED High (>2.8V) LED ON Association with 6mA/3.3V
(Output) (Active High) AP OK (Link source
Good)
Low (<0.4V) LED OFF Power Off
Between High 1 Flash per 3 Association with
(>2.8V) and seconds AP Fail (Link
Low toggle Failed)

PIN51 RESERVED Reserved for future second PCI Express Lane (if needed)
(Output)

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3. Hardware
HW version: REV 10

3.1 Hardware Architecture

3.2 Chip Information

RT2571W Ralink MAC/BBP integrated chip

RF2528 Ralink 2.4GHz Radio Transceiver
SST12LP07 SST Power Amplifier

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3.3 Pin Definition

Pin
Pin Name Pin I/O Type Pin Description
No.
Open Drain active Low signal. This
signal is used to request that the
1 WAKE# Output system return from asleep/suspended
state to service a function initiated
wake event

2 3.3V Power Primary PCIE_3.3 V source

Reserved for future wireless coexistence

3 RESERVED NC
control interface (if needed)

4 GROUND Ground Ground

Reserved for future wireless coexistence

5 RESERVED NC
control interface (if needed)

6 1.5V Power Primary PCIE_1.5 V source

7 CLKREQ# Output Reference clock request signal

Power source for the UIM. Compliant to

8 UIM_PWR Output
the ISO/IEC 7816-3 specification(VCC)

9 GROUND Ground Ground

UIM data signal. Compliant to the

10 UIM_DATA Input/Output
ISO/IEC 7816-3 specification (I/O).
PCI Express differential reference
11 REFCLK- Input
clock (100 MHz)
UIM clock signal. Compliant to the
12 UIM_CLK Output
ISO/IEC 7816-3 specification (CLK).
PCI Express differential reference
13 REFCLK+ Input
clock (100 MHz)
UIM reset signal .Compliant to the
14 UIM_RESET Output
ISO/IEC 7816-3 specification (RST).

15 GOUND Ground Ground

Variable supply voltage (programming

voltage) for class A devices. Refer to
ISO/IEC 7816-3 for operating class
16 UIM_VPP Output
definitions. This signal is reserved for
future use for devices of other
classes. Compliant to the ISO/IEC

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7816-3 specification (VPP).

17 RESERVED(UIM_C8) NC Reserved for future UIM interface (if need.)

18 GOUND Ground Ground

19 RESERVED(UIM_C4) NC Reserved for future UIM interface (if need.)

Active low signal. This signal is used by

the system to disable radio operation
20 W_DISABLE# Input
on add-in cards that implement radio
frequency applications.

21 GOUND Ground Ground

22 PERST# Input Functional reset to the card

PCI Express x1 data interface: one

23 PERn0 Input
differential receive pair

24 +3.3VAUX Power Auxiliary 3.3 V source

PCI Express x1 data interface: one

25 PERp0 Input
differential receive pair

26 GOUND Ground Ground

27 GROUND Ground Ground

28 +1.5V Power Primary PCIE_1.5 V source

29 GROUND Ground Ground

SMBus clock signal compliant to the

30 SMB_CLK Input
SMBus 2.0 specification
PCI Express x1 data interface: one
31 PETn0 Output
differential transmit pair
SMBus data signal compliant to the
32 SMB_DATA Input/Output
SMBus 2.0 specification
PCI Express x1 data interface: one
33 PETP0 Output
differential transmit pair

34 GROUND Ground Ground

35 GROUND Ground Ground

USB serial data interface compliant to

36 USB_D- Input
the USB 2.0 specification
Reserved for future second PCI Express
37 RESERVED NC
Lane (if needed)

USB serial data interface compliant to

38 USB_D+ Output
the USB 2.0 specification

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Reserved for future second PCI Express
39 RESERVED NC
Lane (if needed)

40 GROUND Ground Ground

Reserved for future second PCI Express

41 RESERVED NC
Lane (if needed)

Active low signals. WWAN_LED status

42 LED_WWAN# Output
indicator
Reserved for future second PCI Express
43 RESERVED NC
Lane (if needed)

Active low signals, WLAN_LED Status

44 LED_WLAN# Output
indicator
Reserved for future second PCI Express
45 RESERVED NC
Lane (if needed)

Active low signals, WPAN_LED Status

46 LED_WPAN# Output
indicator
Reserved for future second PCI Express
47 RESERVED NC
Lane (if needed)

48 +1.5V Power Primary PCIE_1.5 V source

Reserved for future second PCI Express

49 RESERVED NC
Lane (if needed)

50 GROUND Ground Ground

Reserved for future second PCI Express

51 RESERVED NC
Lane (if needed)

52 +3.3V Power Primary PCIE_3.3 V source

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4. Software

4.1 Software Version

Wi-Fi
Driver version Ralink RT2571W Drv1.0.0.0 (upgradeable)
Utility version Ralink RU1.0.7.0 (upgradeable)

4.2 Operating System Support

Windows 98SE, Windows 2000, Windows ME, Windows XP and Windows XP-64bit

4.3 Security

802.11i robust security support

 AES
 WEP
 TKIP + 802.1X
 WPA
 WPA2

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5. Test Result

5.1 RF Test

Test item Pass or fail

Transmitter power Pass
Transmit spectrum mask Pass
Transmit spectrum flatness Pass
RF carrier suppression Pass
Transmit power-on and power-down ramp Pass
Transmit center frequency & symbol clock tolerance Pass
Transmit modulation accuracy Pass
Receiver minimum input level sensitivity Pass
Receiver maximum input level Pass
Receiver adjacent channel rejection Pass
Transmit and receive in-band and out-band spurious Pass
Transmit and receive current measurement Pass
PER Test for Transmitter Pass
Bandwidth measurement Pass

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6. Appearance

Front View

Back View

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6.1 Shielding Case Mechanical Drawing

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7. Packaging
Step 1:100 pcs in a tray

Step 2: 4 trays in a carton

Step 3: Put in pack EPE form

Step 4: Package

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8. Certification

CE

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FCC

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