In addition to the powerful CPU, the XIAO RP2040 has 2MB of Flash on board. 11 digital pins, 4 analog pins, 11 PWM Pins,1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface. Some PINs have various functions, Moreover, XIAO RP2040 supports the USB Type-C interface which can supply power and download code. 1 Reset button, 1 BOOT button, 1 user-programmable RGB LED, 1 power LED, 2 status indicators, and 1 user LED are on board, allowing developers to debug their code very easily. The XIAO RP2040 is very compact because all electronic components are soldered on the same board surface, which means you can easily solder the XIAO RP2040 to your own PCB. XIAO RP2040 is pin-compatible with Seeeduino XIAO, so XIAO RP2040 can be learned and developed using the Expansion board of Seeeduino XIAO. The XIAO RP2040 fully supports C/C++ and MicroPython because it uses the same chip (RP2040) as the Seeed RP2040 Microcontroller family. You can also use the Thonny editor to program as if you were using Raspberry Pi Pico CPU Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz Storage 264KB of SRAM, and 2MB of on-board Flash memory I/O PINs 11 digital pins, 4 analog pins, 11 PWM Pins Interface 1 I2C interface, 1 UART interface, 1 SPI interface, 1 SWD Bonding pad interface Power supply USB Type-C interface Downloading interface USB Type-C interface LEDs 1 user LED, 1 power LED, two LEDs for serial port downloading, 1 RGB LED Button 1 RESET button, 1 BOOT button Power Pads For the battery power supply Software compatibility Support Micropython/Arduino/CircuitPython Dimensions 20x17.5x3.5 mm XIAO XIAO RP2040 XIAO nRF52840 XIAO nRF52840 Sense XIAO ESP32C3 Add to Cart Add to Cart Buying Options Buying Options Buying Options Customer Reviews 4.4 out of 5 stars 709 4.4 out of 5 stars 709 4.4 out of 5 stars 126 4.4 out of 5 stars 126 4.5 out of 5 stars 456 Price $9.50$9.50 $24.99$24.99 $14.44$14.44 $21.24$21.24 $8.42$8.42 Processor SAMD21 RP2040 nRF52840 nRF52840 ESP32-C3 RAM 32 KB SRAM 264 KB SRAM 256 KB RAM 256 KB RAM 400 KB SRAM Flash(chip) 256KB / 1MB 1MB 4MB Interface I2C/UART/SPI I2C/UART/SPI I2C/UART/SPI I2C/UART/SPI I2C/UART/SPI PWM/Analog Pin 11/11 11/4 11/6 11/6 11/4 Onboard Button / Reset/Boot Button Reset Button Reset Button Reset/Boot Button Bluetooth / / ✓ ✓ ✓ WIFI / / / / ✓ Programming Languages Arduino, CircuitPython Arduino, MicroPython, CircuitPython Arduino, CircuitPython Arduino, CircuitPython Arduino Baterry Charge IC / / ✓ ✓ ✓