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RP2040 32-bit Cortex M0+ dual core running at ~125 MHz @ 3.3V logic and power. 264 KB RAM, No EEPROM. 12 MHz crystal for perfect timing. 8 MB SPI FLASH chip for storing files and CircuitPython/MicroPython code storage. 20 x GPIO pins with following capabilities: 18 GPIO on castellated/pin breakout pads. 2 GPIO on QT port that can be easily accessed for 5x15 keyboard layouts. Four 12 bit ADCs