This table presents an engineer's quick reference to the pin-out of the 9 way 'D' connector used as a serial port at TTL levels on Psion Workabouts.

Pin |
Mnemonic |
Signal | Direction |
1 |
|
No connection |
|
2 |
RD |
Receive Data | DTE <= DCE |
3 |
TD |
Transmit Data | DTE => DCE |
4 |
Vcc |
5V supply for external devices |
|
5 |
Gnd |
Signal Ground | - |
6 |
DSR |
Data Set Ready | DTE <= DCE |
7 |
RTS |
Request To Send | DTE => DCE |
8 |
CTS |
Clear To Send | DTE <= DCE |
9 |
|
No connection |
|