ZEUS Technical Manual

Detailed hardware description

 

 

Touchscreen controller

The ZEUS supports 4-wire and 5-wire analogue resistive touchscreens using the controller available within the Wolfson WM9712L audio CODEC. The touchscreen controller supports the following functions:

•X co-ordinate measurement.

•Y co-ordinate measurement.

•Pen down detection with programmable sensitivity.

•Touch pressure measurement (4-wire touchscreen only).

The touchscreen can be used as a wake-up source for PXA270 from sleep mode.

The touchscreen interface is broken out on the header J1. For details see J1 – Touchscreen connector, page 77.

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