The Feather M4 Express features the ATSAMD51 processor, allowing you to create amazing projects. Equipped with a Cortex M4 at 120MHz, 512KB Flash, and 192KB RAM, the Feather M4 enables you to program quickly and easily.

• Dimensions: 50.8mm x 22.8mm x 7mm
• Weight: 5 grams
• 32-bit Cortex M4 core at 120 MHz, 3.3V logic and power
• Floating point support with DSP instructions for Cortex M4
• 512 KB flash, 192 KB RAM
• 2 MB SPI FLASH chip for storing files and CircuitPython code
• No EEPROM
• 32.768 KHz crystal for clock generator & RTC
• 3.3V regulator with a maximum output of 500mA
• USB support with USB bootloader and serial port debugging
• Built-in cryptographic engines with AES (256 bit)
• 21 GPIO pins, including:
  • Dual 1 MSPS 12 bit true analog DAC (A0 and A1)
  • Dual 1 MSPS 12 bit ADC
  • 6 SERCOM pins - SPI, I2C, and Serial available
  • 16 PWM outputs
  • I2S input and output
  • Built-in 100mA lipoly charger controller
• 4 mounting holes
• Reset button

The Feather M4 Express has additional space for a Mini NeoPixel, 2 MB SPI Flash storage, and prototyping area. The 2 MB flash storage serves as storage for all your sketches and libraries. It also facilitates reprogramming with the UF2 bootloader, allowing for easy code transfer.

This product is delivered fully assembled and tested, including headers for breadboard installation.