It's an Adafruit ItsyBitsy M4 Express featuring the Microchip ATSAMD51! Small, powerful, with a ultra fast ATSAMD51 Cortex M4 processor running at 120 MHz - this microcontroller board is perfect when you want something very compact, with a ton of horsepower and a bunch of pins. This Itsy is like a bullet train, with it's 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.
ItsyBitsy M4 Express is only 1.4" long by 0.7" wide, but has 6 power pins, 23 digital GPIO pins (7 of which can be analog in, 2 x 1 MSPS analog out DACs, and 18 x PWM out). It's the same chip as the Adafruit Metro M4 but really really small. So it's great once you've finished up a prototype on a Metro M4 or (the upcoming) Feather M4, and want to make the project much smaller. It even comes with 2MB of SPI Flash built in, for data logging, file storage, or CircuitPython code.
Key Features
- Same size, form-factor as the ItsyBitsy 32u4 and ItsyBitsy M0, and nearly-identical pinout as both
- ATSAMD51 32-bit Cortex M4 core running at 120 MHz
- Floating point support with Cortex M4 DSP instructions
- 512 KB flash, 192 KB RAM
- 2 MB SPI FLASH chip for storing files and CircuitPython code storage.
- 32-bit, 3.3V logic and power
- Tons of GPIO! 23 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 (7 analog pins some on ADC1 and some on ADC2)
- 6 x hardware SERCOM - Native hardware SPI, I2C and Serial all available
- 18 x PWM outputs - for servos, LEDs, etc
- 8-bit Parallel capture controller (for camera/video in)
- 1 x Special Vhigh output pin gives you the higher voltage from VBAT or VUSB, for driving
- NeoPixels, servos, and other 5V-logic devices. Digital 5 level-shifted output for high-voltage logic level output.
- Can drive NeoPixels or DotStars on any pins, with enough memory to drive 60,000+ pixels. DMA-
- NeoPixel support on the VHigh pin so you can drive pixels without having to spend any processor time on it.
- Built in crypto engines with AES (256 bit), true RNG, Pubkey controller
- Native USB supported by every OS - can be used in Arduino or CircuitPython as USB serial console, Keyboard/Mouse HID, even a little disk drive for storing Python scripts.
- 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 (such as a battery) - it'll automatically switch over
- 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 v1.8 compatible)
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