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HUAWEI MG323 GSM M2M Module
Hardware Guide
Description of the Application Interfaces
Issue 06 (2013-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
14
Table 3-1 Definitions of pins on the B2B connector
Pin
No.
Pin Name I/O Description DC Characteristics (V)
Normal MUX Min. Tpy. Max
1 SIM_CLK - O
Clock signal of the SIM
card
- 1.80/2.90 -
2 INTEAR_N - AO
Negative pole of the
output of h
andset
speaker
- - -
3 VSIM - P
Power supply of the
SIM card
- 1.80/2.90 -
4 INTEAR_P - AO
Positive pole of the
output of h
andset
speaker
- - -
5 SIM_DATA - I/O
Data signal of the SIM
card
- 1.80/2.90 -
6 EXTEAR_P - AO
Positive pole of the
output of headset
speaker
- - -
7 SIM_RST - O
Reset signal of the SIM
card
- 1.80/2.90 -
8 EXTEAR_N - AO
Negative pole of the
output of
headset
speaker
- - -
9 NC - -
Not connected, please
keep this pin open
- - -
10 INTMIC_N - AI
Negative pole of the
input of h
andset
microphone
- - -
11 GND - - Ground - - -
12 INTMIC_P - AI
Positive pole of the
input of h
andset
microphone
- - -
13 NC - -
Not connected, please
keep this pin open
- - -
14 EXTMIC_P - AI
Positive pole of the
input of h
eadset
microphone
- - -
15 NC - -
Not connected, please
keep this pin open
- - -
16 EXTMIC_N - AI
Negative pole of the
input of h
eadset
microphone
- - -