4.3.2 Mechanical Buttons
SAM C21 Xplained Pro contains two mechanical buttons connected to the SAM C21. One button is the RESET button connected to the 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.
Info: There is
no pull-up resistor connected to the generic user button. Remember to enable the
internal pull-up in the SAM
C21 to use
the button.
| SAM C21 pin | Function | Shared functionality |
|---|---|---|
| RESETN | RESET | Shield, Shield(2), and EDBG |
| PA28 | SW0 | EXT3 and EDBG GPIO3 |