RS232 port pinouts. By Lee Davison. |
Signal | Name | DE-9 Pin | DB-25 Pin |
DCD | Data Carrier Detect | 1 | 8 |
RXD | Receive Data | 2 | 3 |
TXD | Transmit Data | 3 | 2 |
DTR | Data Terminal Ready | 4 | 20 |
GND | Signal Ground | 5 | 7 |
DSR | Data Set Ready | 6 | 6 |
RTS | Request To Send | 7 | 4 |
CTS | Clear To Send | 8 | 5 |
RI | Ring Indicator | 9 | 22 |
Last page update: 15th December, 2005. | e-mail me |