Accessory Interface; Power Interface; Audio Interface - SimCom SIM900B User Manual

SIM900B EVB kit User Guide

3 Accessory Interface

3.1

Power Interface

Table 3: Power interface
Pin Signal
1 Adapter input
3.2

Audio Interface

Table 4: Headset interface
Pin Signal
5 MIC2P&SPK2P
SIM900B_EVB kit_User Guide_V1.02
Figure 4: Power interface
I/O Description
I 5V/2.5A DC source input
Figure 5: Audio interface
I/O Description
I/O Auxiliary positive input and output
11
2010-11-10