SMART ARM-based Microcontrollers
SAM D20 Xplained Pro
USER GUIDE
Preface
The Atmel SAM D20 Xplained Pro evaluation kit is a hardware platform to
evaluate the ATSAMD20J18A microcontroller.
Supported by the Atmel Studio integrated development platform, the kit
provides easy access to the features of the Atmel ATSAMD20J18A and
explains how to integrate the device in a custom design.
The Xplained Pro MCU series evaluation kits include an on-board
Embedded Debugger, and no external tools are necessary to program or
debug the ATSAMD20J18A.
The Xplained Pro extension kits offers additional peripherals to extend the
features of the board and ease the development of custom designs.
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Atmel-42102D-SAM-D20-Xplained-Pro_User Guide-04/2016
Table of Contents
Preface............................................................................................................................ 1
1. Introduction................................................................................................................ 3
1.1.
1.2.
Features....................................................................................................................................... 3
Kit Overview................................................................................................................................. 3
2. Getting Started...........................................................................................................5
2.1.
2.2.
Xplained Pro Quick Start.............................................................................................................. 5
Design Documentation and Relevant Links................................................................................. 5
3. Xplained Pro.............................................................................................................. 7
3.1.
3.2.
3.3.
3.4.
Embedded Debugger................................................................................................................... 7
Hardware Identification System....................................................................................................8
Power Sources............................................................................................................................. 8
Xplained Pro Headers and Connectors........................................................................................9
3.4.1.
Xplained Pro Standard Extension Header..................................................................... 9
3.4.2.
Xplained Pro Power Header........................................................................................ 10
4. Hardware Users Guide............................................................................................ 11
4.1.
Connectors................................................................................................................................. 11
4.1.1.
Xplained Pro Standard Extension Headers..................................................................11
4.1.2.
Current Measurement Header..................................................................................... 13
Peripherals................................................................................................................................. 13
4.2.1.
Crystal..........................................................................................................................13
4.2.2.
Mechanical Buttons..................................................................................................... 14
4.2.3.
LED..............................................................................................................................14
Embedded Debugger Implementation........................................................................................14
4.3.1.
Serial Wire Debug........................................................................................................14
4.3.2.
Virtual COM Port..........................................................................................................14
4.3.3.
Atmel Data Gateway Interface.....................................................................................15
4.3.4.
External Programming and Debugging........................................................................15
4.2.
4.3.
5. Appendix..................................................................................................................17
5.1.
Getting Started with IAR.............................................................................................................17
6. Hardware Revision and Known Issues.................................................................... 20
6.1.
6.2.
6.3.
Identifying Product ID and Revision........................................................................................... 20
Revision 5...................................................................................................................................20
Revision 4...................................................................................................................................20
7. Document Revision History..................................................................................... 22
8. Evaluation Board/Kit Important Notice.....................................................................23
Atmel SAM D20 Xplained Pro [USER GUIDE]
Atmel-42102D-SAM-D20-Xplained-Pro_User Guide-04/2016
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1.
1.1.
Introduction
Features
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Atmel ATSAMD20J18A microcontroller
Embedded debugger (EDBG)
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USB interface
Programming and debugging on board SAM D20 through Serial Wire Debug (SWD)
Programming and debugging external targets through Serial Wire Debug (SWD)
Virtual COM-port interface to target via UART
Atmel Data Gateway Interface (DGI) to target via SPI and TWI
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Four GPIOs connected to target for code instrumentation
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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Three extension headers
Two possible power sources
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External power
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Embedded debugger USB
32kHz crystal
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1.2.
Kit Overview
The Atmel SAM D20 Xplained Pro evaluation kit is a hardware platform to evaluate the Atmel
ATSAMD20J18A.
The kit offers a set of features that enables the ATSAMD20J18A user to get started using the
ATSAMD20J18A peripherals right away and to get an understanding of how to integrate the device in
their own design.
Atmel SAM D20 Xplained Pro [USER GUIDE]
Atmel-42102D-SAM-D20-Xplained-Pro_User Guide-04/2016
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Figure 1-1. SAM D20 Xplained Pro Evaluation Kit Overview
Atmel SAM D20 Xplained Pro [USER GUIDE]
Atmel-42102D-SAM-D20-Xplained-Pro_User Guide-04/2016
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2.
2.1.
Getting Started
Xplained Pro Quick Start
Steps to start exploring the Atmel Xplained Pro platform:
1. Download
Atmel Studio.
2. Launch Atmel Studio.
3. Connect a USB cable (Standard-A to Micro-B or Micro-AB) between the PC and the DEBUG USB
port on the kit.
When the Xplained Pro MCU kit is connected to your computer for the first time, the operating system will
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perform a driver software installation. The driver file supports both 32- and 64-bit versions of Microsoft
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Windows XP, Windows Vista , Windows 7, Windows 8, Windows 10, and Windows Server 2012.
Once the Xplained Pro MCU board is powered the green power LED will be lit and Atmel Studio will auto
detect which Xplained Pro MCU- and extension board(s) are connected. Atmel Studio will present
relevant information like datasheets and kit documentation. The kit landing page in Atmel Studio also has
the option to launch Atmel Software Framework (ASF) example applications for the kit. The SAM D20
device is programmed and debugged by the on-board Embedded Debugger and therefore no external
programmer or debugger tool is needed.
2.2.
Design Documentation and Relevant Links
The following list contains links to the most relevant documents and software for the SAM D20 Xplained
Pro.
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Xplained products
- Atmel Xplained evaluation kits are a series of easy-to-use evaluation kits for
Atmel microcontrollers and other Atmel products. For low pin-count devices the Xplained Nano
series provides a minimalistic solution with access to all I/O pins of the target microcontroller.
Xplained Mini kits are for medium pin-count devices and adds Arduino Uno compatible header
footprint and a prototyping area. Xplained Pro kits are for medium to high pin-count devices, they
features advanced debugging and standardized extensions for peripheral functions. All these kits
have on board programmers/debuggers which creates a set of low-cost boards for evaluation and
demonstration of features and capabilities of different Atmel products.
Atmel Studio
- Free Atmel IDE for development of C/C++ and assembler code for Atmel
microcontrollers.
Atmel sample store
- Atmel sample store where you can order samples of devices.
EDBG User Guide
- User guide containing more information about the on-board Embedded
Debugger.
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IAR Embedded Workbench for ARM
- This is a commercial C/C++ compiler that is available for
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ARM . There is a 30 day evaluation version as well as a code size limited kick-start version
available from their website. The code size limit is 16KB for devices with M0, M0+, and M1 cores
and 32KB for devices with other cores.
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Atmel QTouch Library PTC
- QTouch Library for Atmel AVR and ARM -based microcontrollers.
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Atmel QTouch Composer
- Tool for developing capacitive buttons, sliders, and wheels
applications.
Atmel Data Visualizer
- Atmel Data Visualizer is a program used for processing and visualizing
data. Data Visualizer can receive data from various sources such as the Embedded Debugger Data
Gateway Interface found on Xplained Pro boards and COM ports.
Atmel SAM D20 Xplained Pro [USER GUIDE]
Atmel-42102D-SAM-D20-Xplained-Pro_User Guide-04/2016
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