ATmega328PB Xplained Mini implements two QTouch buttons marked QTBTN1 and QTBTN2 in the board silkscreen.
To get started using the QTouch buttons, open the QTouch Mega328PB Xplained Mini Selfcap Example in Atmel START (http://start.atmel.com/#examples).
| Button | ATmega328PB | PTC |
|---|---|---|
| QTBTN1 | PE2 via 100kΩ | Y6 |
| QTBTN2 | PE3 via 100kΩ | Y7 |