Adafruit ItsyBitsy 32u4-5V 16MHz
- 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.
- 2 MB SPI FLASH chip for storing files and CircuitPython code storage..