Sim Card Interface - SimCom SIM900B User Manual
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Also See for SIM900B:
- Hardware design (49 pages) ,
- Application note (35 pages) ,
- Development kit manual (20 pages)
Table of Contents
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SIM900B EVB kit User Guide
Table 5: Handset interface
Pin
Signal
1
MIC1P
2
SPK1P
3
SPK1N
4
MIC1N
3.3
SIM Card Interface
SIM900B_EVB kit_User Guide_V1.02
I/O
Description
I
Positive microphone input
O
Positive speak output
O
Negative speak output
I
Negative microphone input
Figure 6: SIM card interface
12
2010-11-10
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