Table 1: Evb Description - SimCom SIM900B User Manual

SIM900B EVB kit User Guide

Table 1: EVB description

Part Description
A Interface connecting to SIM900B\SIM900S\CMCC900 module
B SIM card interface
C Headset interface
D Download switch, turn on or turn off download function
E VBAT switch, switch the voltage source from the adaptor or external battery
F PWRKEY key, turn on or turn off SIM900B
G Buzzer
H Expand port, such as keypad port, main and debug serial port, display port
I Main serial port for downloading, AT command transmitting, data exchanging
J Debug serial port
K Hole for fixing the antenna
L DC adapter interface
M Light
N Holes for fixing the SIM900B\SIM900S\CMCC900
O Handset interface
SIM900B_EVB kit_User Guide_V1.02
Figure 2:EVB bottom view
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2010-11-10