User's Manual

SIM340DZ EVB User Guide
4. Test Interface
Figure 10: Test interface overview
4.1 Serial Interface
J1---RS232 Interface
Figure 11: J1 Interface
RS232 Interface Pin List:
Pin Signal I/O Description
1 TXD O Transmit data
2 RXD I Receive data
3 DCD O Data carrier detection
4 RI O Ring Indicator
5 CTS O Clear to Send
6 GND GND
7 DTR I Data Terminal Ready
8 DEBUG_RX I Receive data
9 RTS I Request to Send
10 DEBUG_TX O Transmit data
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