Adafruit Feather M0 Express - ATSAMD21 Cortex M0

The Adafruit Feather M0 Express features an ATSAMD21G18 ARM Cortex M0+ processor running at 48 MHz with 3.3V logic. Equipped with 256KB of FLASH and 32KB of RAM, this board offers powerful performance and USB native support with a built-in USB-to-Serial program and debug capability without requiring an FTDI chip.

Key features include:

• Compact size: 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered
• Lightweight at 5 grams
• 256KB FLASH and 32KB RAM with no EEPROM
• 32.768 KHz crystal for clock generation and RTC
• 3.3V regulator with 500mA peak current output
• USB native support with UF2 bootloader for drag-and-drop programming
• 20 GPIO pins with hardware Serial, I2C, SPI support
• PWM outputs on all pins
• 6 x 12-bit analog inputs and 1 x 10-bit DAC output
• Built-in 100mA Lipoly charger with charging status LED
• Mini NeoPixel and 2 MB SPI Flash storage for CircuitPython scripts and data logging
• Pin #13 red LED, power/enable pin, 4 mounting holes, and reset button

Please note: This board was Adafruit's first for CircuitPython but newer, larger chips like the Feather M4 are recommended for more demanding applications.

The Feather M0 Express comes fully assembled and tested with header included for soldering. Lipoly battery and USB cable are not included.

Learn more and get started with detailed guides for Arduino IDE and CircuitPython on Adafruit's website.