SENA HD132x Series - Manual (Page 9)

HD132x Series User Manual
9
3.1.3 RS232 Communication Interface
l DB9 Connector for RS232 communication
l Serial speeds 150bps ~ 115Kbps
Pin No. Signals Descriptions Functions
1 NC Not connected -
2 RxD Receive Data Data Input
3 TxD Send Data Data Output
4 NC Not connected -
5 GND Signal Ground -
6 NC Not connected -
7 RTS Ready To Send Handshake Output
(+12V=Ready to Rx, -12V=Not Ready to Rx)
8 CTS Clear To Send Data sent
9 NC Not connected Data sent only at +3V ~ 12V
Figure 3.4 Pin Assignment of DSUB Connector
6=NC 9=NC
7=RTS 8=CTS
1=NC
2=RxD
5=GND
4=NC
3=TxD