标签: 串口

PC串行接口串口定义(db9)

PC串行接口串口定义(db9)

PC/AT 机上的串行口是 9 针公插座,引脚定义为:

Pin Name Dir Description
1 CD <– Carrier Detect
2 RXD <– Receive Data
3 TXD –> Transmit Data

4 DTR –> Data Terminal Ready
5 GND —– System Ground
6 DSR <– Data Set Ready
7 RTS –> Request to Send
8 CTS <– Clear to Send
9 RI <– Ring Indicator 阅读详细 »