| 针脚 | 信号 | 定义 | 作用 | | 1 | DCD | 载波检测 | Received Line Signal Detector(Data Carrier Detect) | | 2 | RXD | 接收数据 | Received Data | | 3 | TXD | 发送数据 | Transmit Data | | 4 | DTR | 数据终端准备好 | Data Terminal Ready | | 5 | SGND | 信号地 | Signal Ground | | 6 | DSR | 数据准备好 | Data Set Ready | | 7 | RTS | 请求发送 | Request To Send | | 8 | CTS | 清除发送 | Clear To Send | | 9 | RI | 振铃提示 | Ring Indicator |
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楼主
