Seeeduino XIAO


Image of Board

Seeduino XIAO:

SEEED Studio’s Seeeduino XIAO is a minimal, low-cost board that uses the Atmel ATSAMD21G18, a powerful 32-bit ARM Cortex®-M0+ processor running at 48MHz with 256KB Flash and 32KB SRAM. The board is 20 x 17.5mm in size which is perfect for wearable devices and small projects. It has multiple interfaces including DAC output, SWD Bonding pad interface, I2C, UART and SPI interfaces. It’s compatible with both Arduino IDE and CircuitPython and uses a USB-C connector.


  • CPU: ARM Cortex-M0+ CPU (SAMD21G18) running at up to 48MHz
  • Flash Memory: 256KB
  • SRAM: 32KB
  • Digital I/O pins: 11
  • Analog I/O pins: 11
  • I2C interfaces: 1
  • SPI interfaces: 1
  • UART interfaces: 1
  • USB Type-C connector for transferring code and power
  • Power requirements: 3.3V/5V DC
  • Dimensions 20 × 17.5 × 3.5 mm

Note: This microcontroller runs at 3.3V logic. Using a 5V device may damage the chip or device.

For power supply pins: The built-in DC-DC converter circuit is able to change 5V voltage into 3.3V, which allows you to power the device with a 5V supply via the VIN pin or 5V pin.



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CircuitPython 7.0.0

This is the latest stable release of CircuitPython that will work with the Seeeduino XIAO.

Start here if you are new to CircuitPython.

Release Notes for 7.0.0

Built-in modules available: analogio, board, busio, digitalio, math, microcontroller, neopixel_write, nvm, onewireio, os, pwmio, rainbowio, random, rotaryio, rtc, storage, struct, supervisor, time, touchio, usb_cdc, usb_hid, usb_midi

Absolute Newest

Every time we commit new code to CircuitPython we automatically build binaries for each board and language. The binaries are stored on Amazon S3, organized by board, and then by language. Try them if you want the absolute latest and are feeling daring or want to see if a problem has been fixed.

Past Releases

All previous releases are listed on GitHub, with release notes, and are available for download from Amazon S3. They are handy for testing, but otherwise we recommend using the latest stable release. Some older GitHub release pages include the same binaries for downloading. But we have discontinued including binaries as assets on newer release pages because of the large number of files for each release.