Compaq dc7100 HP Compaq dc71xx and dx61xx Series Business Desktop Computers Te - Page 209
C.3 Connectors, C-9., PS/2 Keyboard Cable Connector Male
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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: 5 3 1 6 4 2 Pin Function 1 Data 2 Not connected 3 Ground 4 +5 VDC 5 Clock 6 Not connected Figure C-9. PS/2 Keyboard Cable Connector (Male) 4 3 2 1 Pin Function 1 +5 VDC 2 Data (-) 3 Data (+) 4 Ground Figure C-10. USB Keyboard Cable Connector (Male) Technical Reference Guide 361834-002 C-17