Features:
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
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
26 × multi-function GPIO pins (3.3V ONLY)
2 × SPI, 2 × I2C, 2 × UART, 3 × 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

Specification:
21mm x 51mm form factor
RP2040 microcontroller chip designed by Raspberry pi in UK
Dual-core Arm Cortex-M0+ Processor, flexible clock running tup to 133MHz
264KB on-chip SRAM
2MB on-board QSPI Flash
26 multifunction GPIO pins, including 3 analogue inputs
2 x UART, 2 x SPI controllers, 2 x I2C controllers, 16 x PWM channels
1 x USB 1.1 controller and PHY, with host and device support
8 x Programmable I/O (PIO) state machines for custom peripheral support
Supported input power 1.8-5.5V DC
Operating temperature -20℃ to +85℃
Castellated module allows soldering direct to carrier boards
Drag-and-drop programming using mass storage over USB