XIAO SAMD21, Microcontroller Development Board, ARM Cortex-M0+, USB-C, Ultra-Compact

The Seeed Studio XIAO SAMD21 is an ultra-compact and low-power development board built around the ATSAMD21G18 microcontroller featuring the ARM Cortex-M0+ 32-bit core. Despite its thumb-sized footprint, it packs serious functionality and flexibility, making it ideal for wearable projects, tiny robots, embedded systems, and rapid prototyping.

Key Features:

• ARM Cortex-M0+ 32-bit microcontroller (ATSAMD21G18)
• 256 KB Flash and 32 KB SRAM memory
• Ultra-small form factor (20×17.5 mm) with castellated holes
• USB Type-C connector for power and programming
• Supports Arduino IDE, CircuitPython, and PlatformIO
• 11 GPIOs with multiple functions: analog, PWM, UART, I2C, SPI

Additional Specifications:

• Microcontroller/Microprocessor: Microchip ATSAMD21G18
• Clock Speed: 48 MHz
• Memory: 256 KB Flash, 32 KB SRAM
• I/O Pins: 11 multifunctional GPIOs
• Logic Level: 3.3V