PC serial port (nowdays rare)
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | SHIELD | - | Shield Ground |
| 2 | TXD |
|
Transmit Data |
| 3 | RXD |
|
Receive Data |
| 4 | RTS |
|
Request to Send |
| 5 | CTS |
|
Clear to Send |
| 6 | DSR |
|
Data Set Ready |
| 7 | GND | - | System Ground |
| 8 | CD |
|
Carrier Detect |
| 9 | n/c | - | |
| 10 | n/c | - | |
| 11 | n/c | - | |
| 12 | n/c | - | |
| 13 | n/c | - | |
| 14 | n/c | - | |
| 15 | n/c | - | |
| 16 | n/c | - | |
| 17 | n/c | - | |
| 18 | n/c | - | |
| 19 | n/c | - | |
| 20 | DTR |
|
Data Terminal Ready |
| 21 | n/c | - | |
| 22 | RI |
|
Ring Indicator |
| 23 | n/c | - | |
| 24 | n/c | - | |
| 25 | n/c | - |
