User Manual

SIM900 EVB User Guide
SIM900-EVB_UGD_V1.01 15 08.12.2009
7 GPIO1 I/O GPIO
8 TEMP_BAT I ADC input
9 SIMPRESENCE I SIM detect input
10 PWM1 O PWM output
11 SDA I/O I2C BUS DATA
12 SCL O I2C BUS CLOCK
13 GND POWER GND
14 PWM2 O PWM output
4.2 J201
Figure 12: J201 Interface
J201 Interface Pin List:
Pin
Signal I/O
Description
1 TXD O Transmit data