Atmel SAM R21 Xplained Pro [USER GUIDE]
42243A-MCU-02/2014
3
1.
Introduction
1.1
Features
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Atmel ATSAMR21G18A microcontroller
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Embedded debugger (EDBG)
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USB interface
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Programming and debugging on board SAM R21 through Serial Wire Debug (SWD)
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Virtual COM-port interface to target via UART
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Atmel Data Gateway Interface (DGI) to target via SPI and TWI
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Four GPIOs connected to target for code instrumentation
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Digital I/O
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Two mechanical buttons (user and reset button)
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One user LED
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Two extension headers
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Antenna
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One ceramic chip antenna (2450AT18D0100)
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One SMA connector for external antenna
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Three possible power sources
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External power
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Embedded debugger USB
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Target USB
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32kHz crystal
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16MHz crystal
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USB interface, device
1.2
Kit Overview
The Atmel SAM R21 Xplained Pro evaluation kit is a hardware platform to evaluate the Atmel
ATSAMR21G18A.
The kit offers a set of features that enables the ATSAMR21G18A user to get started using the
ATSAMR21G18A peripherals right away and to get an understanding of how to integrate the device in their
own design.
