HP dc71xx Benutzerhandbuch
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Technical Reference Guide
361834-002
C-17
Keyboard
C.3 Connectors
Two types of keyboard interfaces may be used in HP/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:
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:
Figure C-9. PS/2 Keyboard Cable Connector (Male)
Figure C-10. USB Keyboard Cable Connector (Male)
Pin
Function
1
Data
2
Not connected
3
Ground
4
+5 VDC
5
Clock
6
Not connected
Pin
Function
1
+5 VDC
2
Data (-)
3
Data (+)
4
Ground
6
5
4
3
2
1
1
2
3
4