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NEW GUIDE: Adafruit Feather M4 Express #Feather @MicrochipMakes #SAMD51

The newest member of the Adafruit Feather Microcontroller ecosystem is here!

It’s what you’ve been waiting for, the Feather M4 Express featuring the Microchip Technology ATSAMD51. This Feather is fast like a swift, smart like an owl, strong like a ox-bird (it’s half ox, half bird, OK?) This feather is powered by our new favorite chip, the ATSAMD51J19 –  with its 120MHz Cortex M4 with floating point support and 512KB Flash and 192KB RAM. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset.

m4

Here are some of the updates you can find when using the Feather M4:

  • 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
  • ATSAMD51 32-bit Cortex M4 core running at 120 MHz, 32-bit, 3.3V logic and power
  • Hardware DSP and floating point support
  • 512 KB flash, 192 KB RAM
  • 2 MB SPI FLASH chip for storing files and CircuitPython code storage.
  • No EEPROM
  • 32.768 KHz crystal for clock generation & RTC
  • 3.3V regulator with 500mA peak current output
  • USB native support, comes with USB bootloader and serial port debugging
  • Built in crypto engines with AES (256 bit), true RNG, Pubkey controller
  • Tons of GPIO! 21 x GPIO pins with following capabilities:
    • Dual 1 MSPS 12 bit true analog DAC (A0 and A1) – can be used to play 12-bit stereo audio clips
    • Dual 1 MSPS 12 bit ADC (6 analog pins some on ADC1 and some on ADC2)
    • 6 x hardware SERCOM – Native hardware SPI, I2C and Serial all available
    • 16 x PWM outputs – for servos, LEDs, etc
    • I2S input and output
    • 8-bit Parallel capture controller (for camera/video in)
  • Built in 100mA lipoly charger with charging status indicator LED
  • Pin #13 red LED for general purpose blinking
  • Power/enable pin
  • 4 mounting holes
  • Reset button

Check out the complete Adafruit Learning System Guide on Feather M4 and you can buy one in the Adafruit Shop right now!

Are you excited for the Feather M4? Let us know in the comments!


Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.

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