SKU : A18035 Specification - 21 mm × 51 mm form factor - RP2040 microcontroller chip designed by Raspberry Pi in the UK - Dual-core Arm Cortex-M0+ processor, flexible clock running up to 133 MHz - 264KB on-chip SRAM - 2MB on-board QSPI Flash - 26 multifunction GPIO pins, including 3 analogue inputs - 2 × UART, 2 × SPI controllers, 2 × I2C controllers, 16 × PWM channels - 1 × USB 1.1 controller and PHY, with host and device support - 8 × Programmable I/O (PIO) state machines for custom peripheral support - Supported input power 1.8–5.5V DC - Operating temperature -20°C to +85°C - Castellated module allows soldering direct to carrier boards - Drag-and-drop programming using mass storage over USB - Low-power sleep and dormant modes - Accurate on-chip clock - Temperature sensor - Accelerated integer and floating-point libraries on-chip