Seeeduino XIAO for Arduino microcontroller-SAMD21 Cortex M0+ is the smallest member of the Seeeduino series. Seeeduino XIAO is the smallest for Arduino compatible board in the Seeeduino series. This is an for Arduino microcontroller embedded with the SAMD21 chip.
The interfaces of Seeeduino XIAO is rich enough in such a tiny Dev. Board as well. On the other hand, this little board has good performance in processing but needs less power. As a matter of fact, it is designed in a tiny size and can be used for Arduino wearable devices and small projects.
Application: Wearable devices, Rapid prototyping (directly attached to the expanded PCB as a minimal system), Perfect for all the projects need mini for Arduino, DIY keyboard, USB development (USB to multi-channel TTL/USB host mode, etc.), A scenario where you need to read multiple mock values The DAC output.
Powerful CPU: ARMM Cortexx-M0+ 32bit 48MHz microcontroller(SAMD21G18) with 256KB Flash,32KB SRAM
Flexible compatibility: Compatible with for Arduino IDE

Easy project operation: Breadboard-friendly
Small size: As small as a thumb(20x17.5mm) for wearable devices and small projects.
Multiple development interfaces: 11 digital/analog pins, 10 PWM Pins, 1 DAC output, 1 SWD Bonding pad interface, 1 I2C interface, 1 UART interface, 1 SPI interface.
CPU: ARM Cortex-M0+ CPU(SAMD21G18) running at up to 48MHz
Storage: 256KB Flash,32KB SRAM
I/O PINs: 14 GPIO PINs,11 analog PINs, 11 digital PINs, 1 DAC output Pin
Interface: 1 I2C interface,1 UART interface, 1 SPI interface
Power supply and downloading interface: USB Type-C interface
LEDs: 1 user LED, 1 power LED, two LEDs for serial port downloading
Reset button: two reset button short connect to reset
Power Pads: For the battery power supply
Software compatibility: Compatible with for Arduino I