The sample applications provided for the EVK2080 boards, QT600 boards and the other example projects output debug information which is captured by a USB bridge chip and then routed to the QTouch Studio for display.
The port and pins assigned for the QDebug protocol with the example projects are arbitrary and have to be changed based on the project configuration chosen and pin availability.
A separate App note is available on the Atmel website (in QTouch libraries webpage) explaining the QT600 debug protocol.