Datasheet

Overview
We love all our Feathers equally, but this Feather is very special. It's our first Feather that is specifically designed for
use with CircuitPython! CircuitPython is our beginner-oriented flavor of MicroPython - and as the name hints at, its a
small but full-featured version of the popular Python programming language specifically for use with circuitry and
electronics.
That doesn't mean you cant also use it with Arduino IDE! At the Feather M0's heart is an ATSAMD21G18 ARM Cortex
M0+ processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino
Zero (http://adafru.it/2843). This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K
of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with
no need for an FTDI-like chip.
Here's some handy specs!
Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
Light as a (large?) feather - 5 grams
ATSAMD21G18 @ 48MHz with 3.3V logic/power
© Adafruit Industries
https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-
circuitpython
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