Adafruit Feather M4 Express - ATSAMD51 Cortex

Adafruit IndustriesSKU: RB-Ada-477
Manufacturer #: 3857

Price  :
Sale price ¥3,945

Tax included Shipping calculated at checkout

Stock  :
Only 2 units left

Payments and Security

American Express Apple Pay Google Pay JCB Mastercard PayPal Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.


  • Adafruit Feather M4 Express - ATSAMD51 Cortex
  • Comes pre-loaded with the UF2 bootloader
  • Built-in crypto engines with AES
  • Fully assembled and tested, with UF2 USB bootloader
  • No special tools or drivers needed
  • Please note: Lipoly battery and USB cable not included

The Adafruit Feather M4 Express - ATSAMD51 Cortex is a fast and strong development board. This feather is powered by the new chip 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.

And best of all, it's a Feather - so you know it will work with all FeatherWings! What a great way to quickly get up and running. The most exciting part of the Feather M4 is that while you can use it with the Arduino IDE - and it's bonkers fast when you do, it is shipped with CircuitPython on board.

Adafruit Feather M4 Express - ATSAMD51 Cortex - Click to Enlarge

When you plug it in, it will show up as a very small disk drive with on it. Edit with your favorite text editor to build your project using Python, the most popular programming language. No installs, IDE or compiler needed, so you can use it on any computer, even ChromeBooks or computers you can't install software on. When you're done, unplug the Feather and your code will go with you.

Adafruit Feather M4 Express - ATSAMD51 Cortex - Click to Enlarge

The Feather M4 Express uses the extra space left over to add a Mini NeoPixel, 2 MB SPI Flash storage and a little prototyping space. You can use the SPI Flash storage like a very tiny hard drive. When used in CircuitPython, the 2 MB flash acts as storage for all your scripts, libraries and files.

When used in Arduino, you can read/write files to it, like a little datalogger or SD card, and then with our helper program, access the files over USB. Easy reprogramming: the Feather M4 comes pre-loaded with the UF2 bootloader, which looks like a USB storage key. Simply drag firmware on to program, no special tools or drivers needed! It can be used to load up CircuitPython or Arduino IDE (it is bossa-compatible). Comes fully assembled and tested, with the UF2 USB bootloader. It also comes with some headers so you can solder it in and plug into a solderless breadboard.

  • 1 x Adafruit Feather M4 Express - ATSAMD51 Cortex


  • 50.8 x 22.8 x 7 mm / 2 x 0.9 x 0.3 inch

  • Voltage: 3.3 V
  • Peak Current Output: 500 mA
  • USB native support: Yes
  • USB bootloader, Serial Port debugging: Yes
  • Crypto engines with AES (256 bit): Yes
  • PWM: Yes
  • GPIO: Yes
  • I2S Input and Output
  • RAM: 192 KB
  • SPI Flash Storage: 2 MB
  • EEPROM: No
  • Lipoly Charger: 100 mA
  • Mounting Holes: 4
  • Reset button: Yes
  • Weight: 4.8 g

Estimate shipping

You may also like