RS232串口针脚定义
9针接口针脚定义:
Pin 1 CD Received Line Signal Detector (Data Carrier Detect)
Pin 2 RXD Received Data
Pin 3 TXD Transmit Data
Pin 4 DTR Data Terminal Ready
Pin 5 GND Signal Ground
Pin 6 DSR Data Set Ready
Pin 7 RTS Request To Send
Pin 8 CTS Clear To Send
Pin 9 RI Ring Indicator
9芯 | 信号方向来自 | 缩写 | 描述 |
1 | 调制解调器 | CD | 载波检测 |
2 | 调制解调器 | RXD | 接收数据 |
3 | PC | TXD | 发送数据 |
4 | PC | DTR | 数据终端准备好 |
5 |
| GND | 信号地 |
6 | 调制解调器 | DSR | 通讯设备准备好 |
7 | PC | RTS | 请求发送 |
8 | 调制解调器 | CTS | 允许发送 |
9 | 调制解调器 | RI | 响铃指示器 |
注:调制解调器 (在这里是一个例子,它可以是其它的RS232终端设备)
9针-25针rs232串口针脚定义
这种串口线用于连接两台针脚数量不一样的rs232接口计算机,串口线头是 9 针母插头,另一头是 25 针母插头如下图片所试:
<9针串口信号定义>
<25针串口信号定义>
rs232串口信号引脚定义
| D-Sub 9 | D-Sub 25 |
|
Receive Data | 2 | 2 | Transmit Data |
Transmit Data | 3 | 3 | Receive Data |
Data Terminal Ready | 4 | 6+8 | Data Set Ready + Carrier Detect |
System Ground | 5 | 7 | System Ground |
Data Set Ready + Carrier Detect | 6+1 | 20 | Data Terminal Ready |
Request to Send | 7 | 5 | Clear to Send |
Clear to Send | 8 | 4 | Request to Send |
信号简称:TXD、RXD、RTS、CTS、DTR、DSR、DCD、RI、GND
文章评论(0条评论)
登录后参与讨论