Board Specifications RP2040 microcontroller chip designed by Raspberry Pi Dual-core Arm Cortex M0+ processor, flexible clock running up to 133 MHz 264KB of SRAM, and 2MB of on-board Flash memory USB-C connector, keeps it up to date, easier to use Castellated module allows soldering direct to carrier boards USB 1.1 with device and host support Low-power sleep and dormant modes Drag-and-drop programming using mass storage over USB 29 × multi-function GPIO pins (20× via edge pinout, others via solder points) 2 × SPI, 2 × I2C, 2 × UART, 4 × 12-bit ADC, 16 × controllable PWM channels Accurate clock and timer on-chip Temperature sensor Accelerated floating-point libraries on-chip 8 × Programmable I/O (PIO) state machines for custom peripheral support