Some MCU have QTouch support – # touch channels implemented as a hardware. Is it true that QTouch library was designed only to work with such MCUs? Can I use it with, for example, 'old' ATmega48? Is it only a software solution which can be ported to any AVR microcontroller despite of hardware QTouch support?
Electrical – Which MCU (Atmel) I can use with QTouch library
avrcapacitivemicrocontrollerqtouchtouch-panel
Best Answer
You can use QTouch also on MCUs which do not have dedicated touch controller peripheral attached to it. Although there will be some limitations like only one single sensing method can run at a time. Also, it will consume more CPU time and more power.
Check out Atmel's site: http://www.atmel.com/products/touchsolutions/bsw/touch-support-for-mcus.aspx