ATmega324PB Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the ATmega324PB reset line and the other is a generic user configurable button. When a button is pressed it will drive the I/O line to GND.
ATmega324PB pin | Silkscreen text | Shared functionality |
---|---|---|
RESET | RESET | - |
PC6 | SW0 | EXT3.9/DGI GPIO3 |