Test Interface; Serial Interface - SimCom SIM340DZ User Manual

SIM340DZ EVB User Guide

4. Test Interface

4.1 Serial Interface

J1---RS232 Interface
Figure 11: J1 Interface
RS232 Interface Pin List:
Pin Signal
1 TXD
2 RXD
3 DCD
4 RI
5 CTS
6 GND
7 DTR
8 DEBUG_RX
9 RTS
10 DEBUG_TX
SIM340DZ-EVB_UGD_V2.01
Figure 10: Test interface overview
I/O
O
I
O
O
O
I
I
I
O
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Description
Transmit data
Receive data
Data carrier detection
Ring Indicator
Clear to Send
GND
Data Terminal Ready
Receive data
Request to Send
Transmit data