Touch screen
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User’s Manual
DLoG ITC 7
11.3.
Explanation of functions and resources
A touch screen controller for resistive touch screens is integrated into the motherboard to
analyze the sensor line state changes caused by touching. The touch screen controller
calculates and formats this data and then sends it to the touch screen software driver via
the COM4 port or optionally the mouse-PS/2 port (interrupt-controlled). The driver
converts the data into pointer commands.
The analog touch screen controller used for analysis provides a resolution of 4096 x
4096 pixels (12-bit horizontal and vertical).
By default the resources for the touch screen controller are the same as for the COM4
port. If the appropriate configuration exists, these may also be the same as for the PS/2
mouse. With the exception of ensuring that the jumpers are set correctly J6 (open =
Touch active) and J13 (closed=PS/2, open=COM4), no further configuration is required.
