Instruction Manual

HD132x Series User Manual
56
RxD
TxD
GND
RTS
CTS
DTR
DSR
DCD
(a) Using Hardware Flow Control
HelloDevice HelloDevice User Device User Device
7=RTS 8=CTS
2=RxD
5=GND
3=TxD
HelloDevice Serial Port
(b) Not using Flow Control
RxD
TxD
GND
RTS
CTS
DTR
DSR
DCD
RxD
TxD
GND
RTS
CTS
DTR
DSR
DCD
RxD
TxD
GND
RTS
CTS
DTR
DSR
DCD
Figure A. HD1320/1320E RS232 Cable Connection Method