Atmel SMART Microcontrollers

Mechanical Buttons

SAM L21 Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the SAM L21 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.

Note: There is no pull-up resistor connected to the generic user button. Remember to enable the internal pull-up in the SAM L21 to use the button.
Table 1. Mechanical Buttons
SAM L21 pin Silkscreen text Shared functionality
RESET RESET -
PA02 SW0 EXT1
Parent topic: Peripherals