Audio Interface - SimCom SIM5360A EVB User Manual

4.2 Audio Interface

J306 is the handset interface. X501 is the headset interface.
NOTE: The MIC's polarity must be correct.
Table 3: Earphone interface
Pin Signal
1 MIC1P
2 EAR_P
3 EAR_N
4 MIC1N
Table 4: Headset interface
Pin Signal
5 GND
6 HEADSET_MIC+
7 HPH_L
8 HPH_R
Speaker interface：
Please refer Figure 1. Pin 1 and Pin 2 is the SPK_M and SPK_P on J501.
NOTE: Audio cable must be away from the RF antenna, otherwise TDD noise may be occurred.
SIM5360A EVB User Guide
Figure 4: Audio Interface
Input/Output Description
I Positive microphone input
O Positive receiver output
O Negative receiver output
I Negative microphone input
I/O Description
Ground
I Headset microphone input
O Positive microphone output
O Negative microphone output
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03.18.2014