|
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 |
![]() " src="http://www.seinp.net/upload_files/10/UpYIb__1330163.gif" width=32 border=0>
|
Transmit Data |
|
4 |
DTR |
![]() " src="http://www.seinp.net/upload_files/10/UpYIb__1330163.gif" width=32 border=0>
|
Data Terminal Ready |
|
5 |
GND |
|
System Ground |
|
6 |
DSR |
|
Data Set Ready |
|
7 |
RTS |
![]() " src="http://www.seinp.net/upload_files/10/UpYIb__1330163.gif" width=32 border=0>
|
Request to Send |
|
8 |
CTS |
|
Clear to Send |
|
9 |
RI |
|
Ring Indicator | |