1.1 Features

  • Atmel ATSAMR21G18A microcontroller

  • Embedded debugger (EDBG)

    • USB interface

    • Programming and debugging on board SAM R21 through Serial Wire Debug (SWD)

    • Virtual COM-port interface to target via UART

    • Atmel Data Gateway Interface (DGI) to target via SPI and TWI

    • Four GPIOs connected to target for code instrumentation

  • Digital I/O

    • Two mechanical buttons (user and reset button)

    • One user LED

    • Two extension headers

  • Antenna

    • One ceramic chip antenna (2450AT18D0100)

    • One SMA connector for external antenna

  • Three possible power sources

    • External power

    • Embedded debugger USB

    • Target USB

  • 32kHz crystal

  • 16MHz crystal

  • USB interface, device