[myelin]

Yep! It's a matter of figuring it out from the microcontroller manual / datasheet (or basing your design on one that already has it figured out.)

Programming microcontrollers is done using an in-circuit programmer, which connects to a header on the board. Adafruit has a great tutorial for this: https://learn.adafruit.com/proper-step-debugging-atsamd21-ar...