CRTOUCH Datasheet, PDF (11/68 Pages) Freescale Semiconductor, Inc – Capacitive and Resistive Touch Sensing Application Specific IC.

Functional Description
Figure 7. Touch points for single touch calibration
Figure 8. Touch pairs for two touch calibration
The calibration process is initiated by setting bit6 into the Trigger Events register. For two touch calibration at least one of the
two touch gestures must be enabled prior to starting the calibration process. It is also important to properly configure the
resolution values to match the screen ratio, to increase the precision of the gestures detection especially for the rotate gesture.
The following diagrams show the sequence of actions followed after setting the calibration bit to start the process.
CRTouch Data Sheet, Rev. 3
Freescale Semiconductor
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