4.1 Mechanical Buttons

Two mechanical buttons are connected to the Atmel AVR XMEGA. All buttons have no external pull-ups so the user has to activate internal pull-ups in order to use them. When a button is pressed it will drive the I/O line to GND.

Table 4-1. Mechanical Button Connection
Pin on XMEGASilkscreen text on PCB
PD0SW0
PD2SW1