Atmel SAM D20 Xplained Pro User guide
USER GUIDE
Atmel SAM D20 Xplained Pro
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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Table of Contents
Preface .......................................................................................... 1
1. Introduction .............................................................................. 3
1.1. Features .... .... ....... .... .... ........... .... .... ........... .... .... ....... .... .... .. 3
1.2. Kit Overview ......... .... .... ........... .... .... ....... .... .... ........... .... .... ... 3
2. Getting started ......................................................................... 5
2.1. Quick-start ........... .... .... ........... .... .... ....... .... .... ........... .... .... ... 5
2.2. Connecting the Kit ......... .... .... ........... .... .... ....... .... .... ........... ... 5
2.3. Design Documentation and Related Links ... ........... .... .... ........... . 5
3. Xplained Pro ............................................................................ 6
3.1. Embedded Debugger ....... .... .... ........... .... .... ........... .... .... ....... . 6
3.2. Hardware Identification System . .... .... ........... .... .... ....... .... .... ..... 6
3.3. Power Supply ..... .... .... ....... .... .... ........... .... .... ........... .... .... ..... 7
3.3.1. Measuring SAM D20 Power Consumption ... ........... .... .... 7
3.4. Standard Headers and Connectors ... .... .... ........... .... .... ........... .. 7
3.4.1. Xplained Pro Standard Extension Header ... .... .... ....... .... 7
3.4.2. Xplained Pro Power Header ........ .... .... ....... .... .... ......... 8
4. Hardware User Guide ............................................................. 9
4.1. Connectors ........... .... .... ....... .... .... ........... .... .... ........... .... .... .. 9
4.1.1. I/O Extension Headers ... .... ....... .... .... ........... .... .... ...... 9
4.2. Peripherals ....... .... .... ........... .... .... ........... .... .... ....... .... .... ..... 10
4.2.1. Crystal .... ........... .... .... ........... .... .... ....... .... .... .......... 10
4.2.2. Mechanical Buttons ... .... ....... .... .... ........... .... .... ......... 11
4.2.3. LED .... .... .... ........... .... .... ....... .... .... ........... .... .... ..... 11
4.3. Embedded Debugger Implementation ...... .... .... ........... .... .... ..... 11
4.3.1. Serial Wire Debug .... .... .... ....... .... .... ........... .... .... ..... 11
4.3.2. Virtual COM Port .... ........... .... .... ....... .... .... ........... .... 11
4.3.3. Atmel Data Gateway Interface .......... .... .... ........... .... .. 11
4.3.4. External Programming and Debugging .. .... .... ....... .... .... 12
5. Hardware Revision History and Known Issues ..................... 13
5.1. Identifying Product ID and Revision .. ........... .... .... ........... .... .... . 13
5.2. Revision 5 .. ........... .... .... ........... .... .... ....... .... .... ........... .... .... 13
5.3. Revision 4 .. ........... .... .... ........... .... .... ....... .... .... ........... .... .... 13
6. Document Revision History ................................................... 14
7. Evaluation Board/Kit Important Notice .................................. 15
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1. Introduction
1.1 Features
● Atmel ATSAMD20J18A microcontroller
● Embedded debugger (EDBG)
● 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
● Four GPIOs connected to target for code instrumentation
● Digital I/O
● Two mechanical buttons (user and reset button)
● One user LED
● Three extension headers
● Two possible power sources
● External power
● Embedded debugger USB
● 32kHz crystal
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.
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Figure 1-1. SAM D20 Xplained Pro Evaluation Kit Overview
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2. Getting started
2.1 Quick-start
3 Steps to start exploring the Atmel Xplained Pro Platform
● Download and install Atmel Studio
● Launch Atmel Studio
● Connect a Micro-B cable to the DEBUG USB port
2.2 Connecting the Kit
When connecting Atmel SAM D20 Xplained Pro to your computer for the first time, the operating system will do
a driver software installation. The driver file supports both 32-bit and 64-bit versions of Microsoft® Windows
XP and Windows 7.
Once connected the green power LED will be lit and Atmel Studio will autodetect which Xplained Pro
evaluation- and extension kit(s) that's connected. You'll be presented with relevant information like datasheets
and kit documentation. You also have the option to launch Atmel Software Framework (ASF) example
applications. The target device is programmed and debugged by the on-board Embedded Debugger and
no external programmer or debugger tool is needed. Refer to the Atmel Studio user guide2 for information
regarding how to compile and program the kit.
1
®
2.3 Design Documentation and Related Links
The following list contains links to the most relevant documents and software for SAM D20 Xplained Pro.
1. Xplained Pro products 3 - Atmel Xplained Pro is a series of small-sized and easy-to-use evaluation kits
for 8- and 32-bit Atmel microcontrollers. It consists of a series of low cost MCU boards for evaluation and
demonstration of features and capabilities of different MCU families.
2. SAM D20 Xplained Pro User Guide 4 - PDF version of this User Guide.
3. SAM D20 Xplained Pro Design Documentation 5 - Package containing schematics, BOM, assembly
drawings, 3D plots, layer plots etc.
4. EDBG User Guide 6 - User guide containing more information about the onboard Embedded Debugger.
5. Atmel Studio 7 - Free Atmel IDE for development of C/C++ and assembler code for Atmel
microcontrollers.
6.
IAR Embedded Workbench® 8 for ARM®. This is a commercial C/C++ compiler that is available for 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.
7. Atmel sample store 9 - Atmel sample store where you can order samples of devices.
1
http://www.atmel.com/atmelstudio
2
http://www.atmel.com/atmelstudio
3
http://www.atmel.com/XplainedPro
4
http://www.atmel.com/Images/Atmel-42102-SAMD20-Xplained-Pro_User-Guide.pdf
5
http://www.atmel.com/Images/Atmel-42102-SAMD20-Xplained-Pro_User-Guide.zip
6
http://www.atmel.com/Images/Atmel-42096-Microcontrollers-Embedded-Debugger_User-Guide.pdf
7
http://www.atmel.com/atmelstudio
8
http://www.iar.com/en/Products/IAR-Embedded-Workbench/ARM/
9
http://www.atmel.com/system/samplesstore
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