Datasheet

10. Capacitive Touch Sensing

10.1 QTouch Library

The QTouch

library provides a simple to use solution to realize touch sensitive interfaces on most AVR

microcontrollers. The QTouch library includes support for the QTouch and QMatrix

™

acquisition methods.

Touch sensing can be added to any application by linking the appropriate QTouch library for the AVR

microcontroller. This is done by using a simple set of APIs to define the touch channels and sensors, and

then calling the touch sensing API’s to retrieve the channel information and determine the touch sensor

states.

The QTouch library is FREE and downloadable from QTouch Library . For implementation details and

other information, refer to the QTouch Library User Guide, also available for download from the Microchip

website.

ATmega48PA/88PA/168PA

Capacitive Touch Sensing

Datasheet Complete

DS40002011A-page 27