RP2040-Zero, Based on Raspberry Pi MCU RP2040

• RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom.
• 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.
• The 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.

https://www.waveshare.com/wiki/RP2040-Zero