Audio Interface - SimCom SIM300D User Manual

SIM300D EVB User Guide

3.2 Audio Interface

Headset interface:
Pin Signal
1 MIC1P
2 SPK1P
3 SPK1N
4 MIC1N
Earphone interface:
Pin Signal
5 MIC2P&SPK2P
SIM300D-EVB_UGD_V1.01
Figure 5: Audio Interface
I/O
I Positive microphone input
O Positive receiver output
O Negative receiver output
I Negative microphone input
Input/Output
I/O Auxiliary positive input and output
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