Figure C-9. Ps/2 Keyboardc; Figure C-10. Usb Keyboard - Compaq Deskpro EXS Technical Reference Manual

Appendix C Keyboard
C.3 CONNECTORS
Two types of keyboard interfaces are used in Compaq systems: PS/2-type and USB-type. System
units that provide a PS/2 connector will ship with a PS/2-type keyboard but may also support
simultaneous connection of a USB keyboard. Systems that do not provide a PS/2 interface will
ship with a USB keyboard. For a detailed description of the PS/2 and USB interfaces refer to
chapter 5 "Input/Output" of this guide. The keyboard cable connectors and their pinouts are
described in the following figures:
Pin
1
2
3
4
5
6
Figure C–9. PS/2 Keyboard Cable Connector (Male)
Pin
1
2
3
4
Figure C–10. USB Keyboard Cable Connector (Male)
C-16 Compaq Personal Computers
Function
Data
Not connected
Ground
+5 VDC
Clock
Not connected
Function
+5 VDC
Data (+)
Data (-)
Ground
Changed - July 2000
5 6
3 4
1 2
4 3 2 1