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 1. Mechanical Button Connection
Pin on XMEGA Silkscreen text on PCB
PD0 SW0
PD2 SW1
Parent topic: Peripherals