User's Manual

SIM345 EVB User Guide
SIM345-EVB_UGD_V1.02 15.02.2008
9
Headset interface:
Pin Signal I/O Description
1 MIC2P I Positive microphone input
2 SPK2P O Positive speak output
3 SPK2N O Negative speak output
4 MIC2N I Negative microphone input
Earphone interface:
Pin Signal Input/Output Description
5 MIC1P&SPK1P I/O Auxiliary positive input and output
3.3 SIM card interface
Figure 6: SIM card interface