User's Guide

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SIM7100A EVB user Guide 20.08.201410
4.3 Antenna Interface
FIGURE 6: Main Antenna connector
4.4 RS232 Interface
FIGURE 7: UART interface
J401 is 9 pins standard RS232 UART interface. It can be connected to a PC directly.
Table 3: Serial Interface
Pin Signal I/O Description
1 DCD O Data Carrier Detection
2 TXD O Transmit data
3 RXD I Receive data
4 DTR I Data Terminal Ready
5 GND Ground
6 NC NC
7 RTS I Request to Send
8 CTS O Clear to Send
9 RI O Ring Indicator