Adafruit ItsyBitsy M4 Express Microcontroller Board

Adafruit ItsyBitsy M4 Express Microcontroller Board is a small and powerful MCU board with the ATSAMD51 Cortex M4 processor running at 120MHz. This 1.4inch x 0.7inch wide board offers six power pins and 23 digital GPIO pins. The ItsyBitsy M4 Express delivers speedy performance with the 120MHz Cortex M4 offering floating point support, 512KB Flash, and 192KB RAM. This microcontroller board has 2MB of SPI Flash built-in for data logging, file storage, or CircuitPython code.


  • Same size, form-factor, and nearly identical pinout as the ItsyBitsy 32u4 and ItsyBitsy M0
  • ATSAMD51 32-bit Cortex M4 core running at 120MHz
  • Hardware DSP and floating point support
  • 512kB flash and 192kB RAM
  • 2MB SPI FLASH chip for storing files and CircuitPython code storage
  • 32-bit logic and 3.3V power supply
  • 23 GPIO pins
  • Can drive NeoPixels or DotStars on any pins
  • Built-in crypto engines with AES
  • Native USB supported by every OS
  • Can be used with Arduino IDE or CircuitPython
  • Built-in red pin #13 LED
  • Built-in RGB DotStar LED
  • Reset button and pin
  • Power with either USB or external output
  • Comes pre-loaded with the UF2 bootloader


  • 35.9mm x 17.8mm x 4.2mm
  • 2.4g product weight



Mechanical Drawing - Adafruit ItsyBitsy M4 Express Microcontroller Board
Veröffentlichungsdatum: 2018-07-16 | Aktualisiert: 2022-09-12