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RS232 PC Serial Interface
DB-9 Serial Port Pinouts
The pinouts below are referenced as coming from a PC serial data port via a male DB-9 connector.
Pin | Signal | Dir | Function |
1 | DCD/RLSD | IN | Carrier Detect |
2 | RXD | IN | Receive Data |
3 | TXD | OUT | Transmit Data |
4 | DTR | OUT | Data Term Ready |
5 | GND | | Ground |
6 | DSR | IN | Data Set Ready |
7 | RTS | OUT | Request to Send |
8 | CTS | IN | Clear to Send |
9 | RI | IN | Ring Indicator |
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Updated 02/21/09 12:00
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