GE PROPRIETARY TO GE
D
IRECTION 5308917-100, REVISION 8 LOGIQ P3 SERVICE MANUAL
5-20 Section 5-2 - PWA Assy Diagrams
5-2-7 Keyboard
Figure 5-16 Keyboard Block Diagram
Keyboard has the following main interfaces:
1.) USB controller that interfaces the Keyboard to the System SW. The ultrasound Keys are directly
mapped to this controller.
2.) Trackball and Alphanumeric Keyboard is connected to the system via the PS2 interface. There is
one Microcontroller that decodes the Alphanumeric key press information and relays this
information to the system via the PS2.
3.) One USB port is extended from the MST board and is available on the Keyboard.
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