Core SAMD21 Features:

  • Powerful SAMD21 mini PCB board, 32-bit ARM cortex M0.
  • 256KB flash, 32KB SRAM, and an operating speed of up to 48MHz
  • One of the most unique features of the SAMD21 is SERCOM – a set of six configurable serial interfaces that can be turned into either a UART, I2C master, I2C slave, SPI master, or SPI slave. Each SERCOM provides for a lot of flexibility: the ports can be multiplexed, giving you a choice of which task each pin is assigned.
  • Software supports arduino (default bootloader loaded), micropython, etc.

Board Features:

  • Compact mini size 21.5 x 28.5 mm, capable to embed into your small projects inteligent system.
  • Lead out most pins of the core SAMD21 MCUs, total 42 pins (including 1x 3.3V, 1x 5V_USB, 3x GND)
  • All pin pitch is 2.0mm. For all the pin descriptions please see attached image.
  • Surround with basic essential perpherial circuits:
    • 32K RTC crystal
    • 250mA, 1.5-5Vin, Iq=6uA LDO SC6206 power regulator.
    • On board programmable LED on pin D13


  • On board programming USB pin port, on top right corner: D+, D-, GND, +5V pin port.
  • You need a USB-to-pin header cable to connect from USB to these pins. Please prepare this alone.
  • Firmware:
    • (Default) Currently preloaded with arduino bootloader, you can attach USB cable and use with arduino core out of box.

Package includes:

  • Main board
  • 2x pitch 2.00mm 1×40 pin header
  • 1x pitch 2.00mm 2×2 pin header for attaching USB cable connection.

Additional information

Weight 0.01 kg


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