Adafruit ItsyBitsy M4 Express featuring ATSAMD51

Introducing the Adafruit ItsyBitsy M4 Express, a compact powerhouse that sits between the Feather and Trinket in size but offers incredible performance. Powered by the Microchip ATSAMD51 processor, this microcontroller board features a 120 MHz Cortex M4 chip with floating-point support, making it an ideal choice for projects that need both small form factor and high performance.

Key Features:

• Processor: 120 MHz Cortex M4 with floating point support, capable of running at incredible speeds for a variety of projects.
• Memory: 512 KB of Flash and 192 KB of RAM, providing ample space for code and data.
• Extra Peripherals: Includes a 2 MB SPI Flash for data logging, file storage, or running CircuitPython code.
• GPIO Pins: Despite its small size (1.4” x 0.7”), it offers 23 digital GPIO pins, including:
  • 7 Analog Inputs (ADC)
  • 2 DACs (1 MSPS, 12-bit)
  • 18 PWM Outputs (perfect for controlling servos, LEDs, etc.)
• Connectivity: Equipped with 6 hardware SERCOM for SPI, I2C, and Serial communication.
• High-Voltage Output: 1 Special Vhigh output pin for driving devices like NeoPixels or servos with 5V logic.
• Audio: Dual 12-bit DAC (A0, A1) can be used to play stereo audio clips.
• Low Power & USB: Powered either by USB or an external battery, with automatic switching between the two.

Ready for Immediate Use:

• Pre-loaded with CircuitPython, making it easy to use right out of the box. Simply plug it in, and it appears as a disk drive. You can edit the code directly and save it, no installation needed.
• Can also be used with the Arduino IDE, providing flexibility for both CircuitPython and Arduino users.
• Built-in USB support allows you to use it as a USB serial console, keyboard/mouse HID, or even a small disk drive for storing your Python scripts.

Compact Yet Feature-Rich:

• No I2S: Due to size constraints, the 48-pin version of the chip lacks I2S support, but it includes a stereo DAC for audio output.
• Neopixel Support: Drive 60,000+ NeoPixels without burdening the processor, thanks to DMA-NeoPixel support on the VHigh pin.
• Built-in LEDs: Includes a red pin #13 LED and an RGB DotStar LED for visual feedback.

Perfect for Makers:

At just 1.4" x 0.7", the ItsyBitsy M4 Express is a great choice when you need to make a project smaller without compromising on power. Whether you’re moving from a Metro M4 or Feather M4 prototype, this microcontroller offers great speed and plenty of I/O in a tiny package.

It’s the ideal board for those who want an ultra-compact and high-performance solution for projects like wearables, IoT devices, data logging, and more. Each board comes fully assembled and tested, with solderable headers for easy breadboard use. Whether you prefer CircuitPython or Arduino, the ItsyBitsy M4 is ready to handle it all!