发表于:2003-07-26 21:53:00
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9针和25针串口的针脚定义
25 针针脚号
9 针针脚号
缩写
全称
Pin 2
Pin 3
TD
Transmit Data
Pin 3
Pin 2
RD
Receive Data
Pin 4
Pin 7
RTS
Request To Send
Pin 5
Pin 8
CTS
Clear To Send
Pin 6
Pin 6
DSR
Data Set Ready
Pin 7
Pin 5
SG
Signal Ground
Pin 8
Pin 1
CD
Carrier Detect
Pin 20
Pin 4
DTR
Data Terminal Ready
Pin 22
Pin 9
RI
Ring Indicator