APPENDIX A
Connector Pin-Outs
A-2 6400Hand-Held Computer User’s Guide
Optional Communication Adapter 9-PinD-Sub Connector

Figure A-2

9-Pin D-Sub Connector Pinouts

12345
67 89
Negative contact
Positive contact
Pin Signal Function
1 NoConnect DataCarrier Detect
2 RXD Receive Data
3 TXD Transmit Data
4 looped to DSR DataTerminal Ready
5 GND Ground
6 looped to DTR Data Send Ready
7 RTS Request To Send
8 CTS Clear To Send
9Vcc 5volts*

BCAUTION: * 5 voltso n pin 9is for use with tethered scanners and printers

only, this maydamage modems.