ATSAMD21G18 Microcontroller Development Board 0.032768MHz/48MHz CPU 32KB RAM 256KB Flash
Adafruit Feather M0 Express - Designed for CircuitPython | Adafruit Industries 3403
Family Name = Development Tools / Frequency MHz = 48 / Program Memory kB = 256 / Memory Type = Flash / Interfaces = USB / Interfaces = I²C / Interfaces = SPI / Interfaces = GPIO / Supply Voltage Max. V = 5 / Length mm = 51 / Width mm = 22.8 / Height mm = 7.3 / Weight g = 4.7