Atmel SAM R21 Xplained Pro (USER GUIDE)
Contents
1. Atmel Atmel SAM R21 Xplained Pro USER GUIDE 27 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 CONNECTED Atmel Enabling Unlimited Possibilities Atmel Corporation 1600 Technology Drive San Jose CA 95110 USA T 1 408 441 0311 F 1 408 436 4200 www atmel com 2015 Atmel Corporation Rev Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 Atmel Atmel logo and combinations thereof Enabling Unlimited Possibilities AVR and others are registered trademarks or trademarks of Atmel Corporation in U S and other countries Windows is a registered trademark of Microsoft Corporation in U S and or other countries ARM and Cortex are a registered trademarks of ARM Ltd Other terms and product names may be trademarks of others DISCLAIMER The information in this document is provided in connection with Atmel products No license express or implied by estoppel or otherwise to any intellectual property right is granted by this document or in connection with the sale of Atmel products EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT INDIRECT CONSEQUENTIAL PUNITI2. Xplained Pro RP rn Atmel SAM R21 Xplained Pro USER GUIDE Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 24 Figure 8 4 Configure Reset CMSIS DAP GDB Server IAR ROM monitor Ijet JTAGjet J4ink J Trace TI Stellaris Macraigor PE micro RDI ST LINK Third Party Driver XDS 100 200 ICDI Figure 8 5 Configure Interface Atmel CMSIS DAP GDB Server IAR ROM monitor Ijet JTAGjet J Link J Trace TI Stellaris Macraigor PE micro RDI ST LINK Third Party Driver XDS 100 200 ICDI Options for node Getting Started IAR and Xplained Pro Duration ms Delay after E Log communication SPROJ DIRS cspycomm log f C Overide default CPU Select Explicit probe configuration Multitarget debug system Target number or Multidrop ID b C Target with multiple CPUs CPU number on target Atmel SAM R21 Xplained Pro USER GUIDE Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 25 9 Document Revision History Document Date Comment revision 42243C 08 2015 Added ERRATA in the known issues chapter added IAR getting started chapter 42243B 06 2014 Fixed RF switch control pin mapping to be correct and updated the Agency Certification chapter 42243A 02 2014 Initial document release Atmel Atmel SAM R21 Xplained Pro USER GUIDE 26 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 10
3. Evaluation Board kit Important Notice This evaluation board kit is intended for use for FURTHER ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY It is not a finished product and may not yet comply with some or any technical or legal requirements that are applicable to finished products including without limitation directives regarding electromagnetic compatibility recycling WEEE FCC CE or UL except as may be otherwise noted on the board kit Atmel supplied this board kit AS 15 without any warranties with all faults at the buyer s and further users sole risk The user assumes all responsibility and liability for proper and safe handling of the goods Further the user indemnifies Atmel from all claims arising from the handling or use of the goods Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge and any other technical or legal concerns EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER USER NOR ATMEL SHALL BE LIABLE TO EACH OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES No license is granted under any patent right or other intellectual property right of Atmel covering or relating to any machine process or combination in which such Atmel products or services might be or are used Mailing Address Atmel Corporation 1600 Technology Drive San Jose CA 95110 USA
4. 9 IRQ GPIO PA22 EXTINT 6 10 SPI 55 B GPIO 23 GPIO 11 TWI SDA PA16 SERCOM 1 PAD 0 C SDA and EDBG 12 TWI SCL PA17 SERCOM 1 PAD 1 PC SCL EXT3 and EDBG 13 USART RX PA05 SERCOMO PAD 1 UART RX EDBG 14 USART TX PA04 SERCOMO PAD 0 UART TX EDBG 15 SPI_SS_A SERCOMS PAD 1 SPI SS 16 MOSI PB22 SERCOM5 PAD 2 SPI MOSI EXT3 and EDBG 17 MISO PB02 SERCOMS PAD 0 SPI MISO and EDBG 18 SCK PB23 SERCOM5 PAD 3 SPI SCK EXT3 and EDBG 19 GND GND 20 VCC VCC Atmel Atmel SAM R21 Xplained Pro USER GUIDE Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 11 Atmel Table 4 2 Extension Header EXT3 Pin on EXT3 SAM R21 pin LC NEN Shared functionality 4 ID Communication line to ID chip on extension board 2 GND GND 3 ADC 4 ADC E 5 GPIO1 PA15 GPIO 6 GPIO2 7 PWM 8 PWM 9 IRQ GPIO 10 SPI_SS_B GPIO 08 GPIO 41 TWI_SDA PA16 SERCOM PAD 0 FC SDA 12 TWI SCL PA17 1 PAD 1 FC SCL 13 USART RX 5 14 USART TX 15 SPI_SS 14 GPIO 16 SPI MOSI PB22 SERCOMS PAD 2 SPI MOSI 17 SPI MISO PBO2 SERCOMS 0 SPI MISO 18 SPI SCK PB23 SERCOMS 3 SPI SCK 19 GND GND 20 VCC Related Links Xplained Pro Standard Extension Header on page 9 Alternate Signals Header EDBG EXT1 and EDBG EXT1 and EDBG EDBG EXT1 and E
5. Atmel SAM R21 Xplained Pro USER GUIDE 16 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 4 4 2 Virtual COM port The Embedded Debugger acts as a Virtual Com Port gateway by using one of the ATSAMR21G18A UARTS Table 4 12 Virtual COM Port Connections Pin SAM R21 PA04 SERCOMO 0 UART TXD SAM R21 TX line PA05 SERCOM1 PAD 1 UART RXD SAM R21 RX line Related Links Embedded Debugger on page 7 4 4 3 Atmel Data Gateway Interface The Embedded Debugger features an Atmel Data Gateway Interface DGI by using either an SPI or port The DGI can be used to send a variety of data from the SAM R21 to the host PC Table 4 13 DGI Interface Connections When Using SPI Pin SAM R21 Function PA27 GPIO SPI SS Slave select SAM R21 is Master 2 SERCOMS PAD 0 SPI MISO Master Slave PB22 5 PAD SPI MOSI Master Out Slave in PB23 SERCOMS PAD 3 SPI SCK Clock Out Table 4 14 DGI Interface Connections When Using Pin on SAM R21__ Function PA16 SERCOM1 PAD 0 FC SDA Data line PA17 SERCOM1 PAD 1 FC SCL Clock line Four GPIO lines are connected to the Embedded Debugger The EDBG can monitor these lines and time stamp pin value changes This makes it possible to accurately time stamp events in the SAM R21 application code Table 4 15 GPIO Lines Connected to the EDBG PAO8 GPIOO PAO 12 2 PA14 GPIO3 Related Link
6. In the category Debugger CMSIS DAP select the JTAG SWD tab Select SWD as the interface and optionally select the SWD speed Figure 8 1 Select Target Device Options for node Getting Started and Xplained Pro Category General Options Runtime Checking C C Compiler Assembler Output Converter Custom Build Build Actions Linker Core Target Output Library Configuration Library Options MISRAC 200 Processor variant ARM7TDMI 7 Debugger Simulator Device None Angel CMSIS DAP GDB Server IAR ROM monitor as Ijet JTAGjet Little 14 2 Big TI Stellaris BE32 Macraigor e PE micro EE RDI ST LINK Third Party Driver XDS 100 200 ICDI Atmel SAM R21 Xplained Pro USER GUIDE 23 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 Figure 8 2 Select Debugger Figure 8 3 Configure Flash Loader Atmel Simulator CMSIS DAP GDB Server IAR ROM monitor Ijet JTAGjet J4ink J Trace TI Stellaris Macraigor PE micro RDI ST LINK Third Party Driver XDS 100 200 ICDI Angel CMSIS DAP GDB Server TAR ROM monitor Ijet JTAGjet J4ink J Trace TI Stellaris Macraigor PE micro RDI ST LINK Third Party Driver XDS 100 200 ICDI Options for node Getting Started IAR and Xplained Pro E default STOOLKIT_DIRS CONFIG debugger Atmel ATSAMD21J18A Options for node Getting Started
7. To increase the emitted light level the value of the series resistor can be lowered The EDBG functionality can be restored by re soldering the removed components they are all 00 resistors Important E The voltage supplied through the power header is applied directly to the ATSAMR21G18A and the extension headers Applying a voltage greater than 3 3V may damage the board permanently Atmel Atmel SAM R21 Xplained Pro USER GUIDE 15 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 Figure 4 1 1 8V Operation Modifications Removed components EXTENSION HEADER eno ADC ADC Grio 0 pww 55 X MOSI 8 55 SPI_SCK wiso Atmel Corp 2013 PCBA LABEL A08 1903 Rev 2 4 4 Embedded Debugger Implementation SAM R21 Xplained Pro contains an Embedded Debugger EDBG that can be used to program and debug the ATSAMR21G18A using Serial Wire Debug SWD The Embedded Debugger also include Virtual Com port interface over UART an Atmel Data Gateway Interface over SPI and TWI and it monitors four of the SAM R21 GPIOs Atmel Studio can be used as a front end for the Embedded Debugger 4 4 4 Serial Wire Debug The Serial Wire Debug SWD use two pins to communicate with the target Table 4 11 SWD Connections Pin SAM R21 Function PA30 SWD clock PA31 SWD data Related Links Embedded Debugger on page 7 Atmel
8. buttons user and reset button user LED Two extension headers Antenna 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 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 Atmel SAM R21 Xplained Pro USER GUIDE 4 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 Figure 1 1 SAM 21 Xplained Pro Evaluation Kit Overview Atmel EA 2258 lt T CURRENT MEASUREMENT SWO0 USER BUTTON HEADER RESET BUTTON TARGET USB DEBUG USB m 2 gt 5 9 E USER LEDO wy T a POWER aM we Atmel E perdis CHIP ANTENNA gt 1 SAMR21 X PLAINED VE FOE EXTERNAE It fgg 16MHz Crystal i 16MHz CRYSTAL a 42 DEBUGGER FOR RF 32 768kHz CRYSTAL ANTENNA SWITCH amp BALUN EXTENSION HEADER EXTERNAL ANTENNA CONNECTOR do dh do d dd d EXTENSION HEADER 3 Atmel SAM R21 Xplained Pro USER GUIDE 5 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 2 Getting Started 2 1 Xplaine
9. different MCU families 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 e EDBG User Guide User guide containing more information about the on board Embedded Debugger Embedded Workbench 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 MO MO and M1 cores 32KB for devices with other cores e 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 Design Documentation Package containing CAD source schematics BOM assembly drawings 3D plots layer plots etc Hardware Users Guide in PDF format PDF version of this User Guide SAM R21 Xplained Pro at www atmel com www atmel com link Atmel Atmel SAM R21 Xplained Pro USER GUIDE 6 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 3 Xplained Pro Xplained Pro is an evaluation platform that provides the full Atmel microcontroller experience The platform consists of a series of Microcontroller MCU boards and extension boards which are integr
10. 8 3 4 Xplained Pro Headers 9 3 4 1 Xplained Pro Standard Extension 9 3 4 2 Xplained Pro Power 10 4 Hardware User 11 1 Ser S 11 4 1 1 Xplained Pro Extension 11 4 1 2 Altemate Signals Header ecrit iiie nete etie teen pe oca dece ede ades 12 4 1 3 Current Measurement nennen nere eene 13 4 1 4 Cortex Debug Connector d bar paene pre 13 4 2 5 ead ek ee eee eile eee 13 AD 13 4 2 2 Mechanical aaa 14 P MEN I 14 Lr HEU EEUU 14 425 Buisson midi A 14 4 3 8 E R 15 4 4 Embedded Debugger 16 4441 WRC 16 442 COM 17 443 Atmel Data Gateway 17 SNB dicit 18 p Agen
11. Atmel Atmel SMART SMART ARM based Microcontrollers SAM R21 Xplained Pro USER GUIDE Preface Atmel SAM R21 Xplained Pro evaluation kit is a hardware platform to evaluate the ATSAMR21G18A microcontroller Supported by the Atmel Studio integrated development platform the kit provides easy access to the features of the Atmel ATSAMR21G18A 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 ATSAMR21G18A The Xplained Pro extension kits offers additional peripherals to extend the features of the board and ease the development of custom designs Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 Table of Contents aile Q 1 1 Introduction i E E 4 D ARE I II 4 1 2 Kit OVEPVIQW RR 4 Ut Ez It oM ETT M 6 2 1 Xplained Pro Quick Start dead ee dep aan p Ede 6 2 2 Design Documentation and Relevant 6 3 7 Sel Embedded Deb gger 5 rione 7 3 2 Hardware Identification 8 3 3 Power SOURCES ai iii E
12. DBG EXT1 and EDBG EXT1 and EDBG The alternate signals header is marked with Alternate in silkscreen of the kit The signals provided here are otherwise hard to do measurements on Table 4 3 Alternate Signals Header 1 PA09 RFCTRL1 negative antenna switch control signal 2 PA12 RFCTRL2 positive antenna switch control signal 3 PA27 GPIO chip select on the EDBG DGI SPI bus Atmel SAM R21 Xplained Pro USER GUIDE 12 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 4 2 4 2 1 Current Measurement Header An angled 1x2 100mil pin header marked with MCU current measurement is located at the upper edge of the SAM R21 Xplained Pro All power to the ATSAMR21G18A is routed through this header To measure the power consumption of the device remove the jumper and replace it with an ammeter Caution Removing the jumper from the pin header while the kit is powered may cause the ATSAMR21G18A to be powered through its I O pins This may cause permanent damage to the device Cortex Debug Connector The Cortex debug connector is provided to enable external debuggers to be connected to the ATSAMR21G18A The footprint is made for a 2x5 50mil connector and the pinout is shown in the table below This header should only be used when the EDBG is disconnected from the target For more information see 1 8V Operation on page 15 Table 4 4 Cortex Debug Connector Pinon connector Connected Function 1 VCC Target Voltage reference PA31_
13. SWDIO Debug data GND GND PA30_SWCLK Debug clock GND GND NC NC NC GND GND detect RESETN Target reset o ol o oc Peripherals Crystal The SAM R21 Xplained Pro kit contains one crystal that can be used as clock source for the SAM R21 device The crystal has a cut strap next to it that can be used to measure the oscillator safety factor This is done by cutting the strap and adding a resistor across the strap More information about oscillator allowance and safety factor can be found in application note AVR4100 Note The 16 2 crystal is connected directly to the RF die inside the SAM R21 The clock signal generated by the crystal is routed from the CLKM pin on the RF die to a GCLK pin on the microcontroller For more information on how the RF die is connected to the microcontroller and how to configure the CLKM pin see the SAM R21 datasheet Atmel Atmel SAM R21 Xplained Pro USER GUIDE 13 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 Table 4 5 External 32 768kHz Crystal rm SAM R21 Function PAO0 XIN32 PAO XOUT32 Table 4 6 External 16MHz Crystal Pin SAM R21 Function XTAL1 XIN XTAL2 XOUT 4 2 2 Mechanical Buttons SAM R21 Xplained Pro contains two mechanical buttons One button is the RESET button connected to the SAM R21 reset line and the other is a generic user configurable button When a button is pressed it will drive the I O lin
14. VE SPECIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS AND PROFITS BUSINESS INTERRUPTION OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time without notice Atmel does not make any commitment to update the information contained herein Unless specifically provided otherwise Atmel products are not suitable for and shall not be used in automotive applications Atmel products are not intended authorized or warranted for use as components in applications intended to support or sustain life SAFETY CRITICAL MILITARY AND AUTOMOTIVE APPLICATIONS DISCLAIMER Atmel products are not designed for and will not be used in connection with any applications where the failure of such products would reasonably be expected to result in significant personal injury or death Safety Critical Applications without an Atmel officer s specific written consent Safety Critical Applications include without limitation life support devices and systems equipment or systems for the operation of nuclear facilities and weapons systems Atmel products are not designed nor intended for use in military or aerospace applications or environments unles
15. ad and sent to Atmel Studio The Atmel Kits extension installed with Atmel Studio will give relevant information code examples and links to relevant documents Table 3 2 Xplained Pro ID Chip Content on page 8 shows the data fields stored in the ID chip with example content Table 3 2 Xplained Pro ID Chip Content Data field Data type Example content Manufacturer ASCII string Atmel 0 Product Name ASCII string Segment LCD1 Xplained Pro 0 Product Revision ASCII string 02 0 Product Serial Number ASCII string 177402020000001070 Minimum Voltage mV uint16 t 3000 Maximum Voltage mV uint16 t 3600 Maximum Current mA uint16 t 30 3 3 Power Sources The SAM R21 Xplained Pro kit can be powered by several power sources listed in Table 3 3 Power Sources for SAM R21 Xplained Pro on page 8 Table 3 3 Power Sources for SAM R21 Xplained Pro Voltage requirements Current requirements Connector marking External power 2 100 for Recommended USB host operation minimum is 1A to be 4 3V to 5 5V if USB host able to provide enough operation is not current for connected required USB devices and the board itself Recommended maximum is 2A due to the input protection maximum current specification Embedded debugger 4 4V to 5 25V according 500mA according to DEBUG USB USB to USB spec USB spec Target USB 4 4V to 5 25V according 500mA according to TARGET USB to USB spec USB spec The kit will automatically detect which power sour
16. ated with Atmel Studio have Atmel Software Framework ASF drivers and demo code support data streaming and more Xplained Pro MCU boards support a wide range of Xplained Pro extension boards which are connected through a set of standardized headers and connectors Each extension board has an identification ID chip to uniquely identify which boards are connected to an Xplained Pro MCU board This information is used to present relevant user guides application notes datasheets and example code through Atmel Studio 3 1 Embedded Debugger The SAM R21 Xplained Pro contains the Atmel Embedded Debugger EDBG for on board debugging The EDBG is a composite USB device of three interfaces a debugger Virtual COM Port and a Data Gateway Interface Together with Atmel Studio the EDBG debugger interface can program and debug the ATSAMR21G18A On SAM R21 Xplained Pro the SWD interface is connected between the EDBG and the ATSAMR21G18A The Virtual COM Port is connected to a UART on the ATSAMR21G18A and provides an easy way to communicate with the target application through terminal software It offers variable baud rate parity and stop bit settings Note that the settings on the ATSAMR21G18A must match the settings given in the terminal software Note If not set automatically data terminal ready DTR must be set in the terminal software The DGI consists of several physical interfaces for communication with the host computer Com
17. ces are available and choose which one to use according to the following priority Atmel Atmel SAM R21 Xplained Pro USER GUIDE 8 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 1 External power 2 Embedded Debugger USB 3 Target USB Info External power is required when 500mA from a USB connector is not enough to power the board with possible extension boards A connected USB device in a USB host application might easily exceed this limit 3 4 Xplained Pro Headers and Connectors 3 4 1 Xplained Pro Standard Extension Header All Xplained Pro kits have one or more dual row 20 pin 100mil extension header Xplained Pro MCU boards have male headers while Xplained Pro extensions have their female counterparts Note that all pins are not always connected All connected pins follow the defined pin out description in Table 3 4 Xplained Pro Standard Extension Header on page 9 The extension headers can be used to connect a variety of Xplained Pro extensions to Xplained Pro MCU boards or to access the pins of the target MCU on Xplained Pro MCU boards directly Table 3 4 Xplained Pro Standard Extension Header Pin number Name Deseo NM 1 ID Communication line to the ID chip on an extension board 2 GND Ground 3 ADC Analog to digital converter alternatively positive part of differential ADC 4 ADC Analog to digital converter alternatively negative part of differential ADC 5 GPIO1 General purpose 6 GPIO2 General
18. cy COrtifiGBliDHi sd 19 6 1 United States 19 6 2 European Union 19 6 3 Camadar 1 m 20 6 4 List of Antennas Tested With This 20 7 Hardware Revisions and Known 155 8 22 Atmel Atmel SAM R21 Xplained Pro USER GUIDE Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 2 7 1 Identifying Product ID and 22 MEM MOUSE iene 22 8 ETT 23 8 12 Gettirig Started WINIAR riiin 23 9 DO CIL eiae w 26 10 Evaluation Board kit Important 27 Atmel Atmel SAM R21 Xplained Pro USER GUIDE 3 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 1 1 1 1 2 Atmel Introduction 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 TWI Four GPIOs connected to target for code instrumentation Digital I O Two mechanical
19. d Pro Quick Start Three 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 and the DEBUG USB port on the kit When the Atmel SAM R21 Xplained Pro is connected to your computer for the first time the operating system will perform a driver software installation The driver file supports both 32 and 64 bit versions of Microsoft Windows XP Windows Vista Windows 7 and Windows 8 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 R21 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 R21 Xplained Pro e Xplained Pro products Atmel Xplained Pro is a series of small sized and easy to use evaluation kits for Atmel microcontrollers and other Atmel products It consists of a series of low cost MCU boards for evaluation and demonstration of features and capabilities of
20. e as described in Annex Il of the R amp TTE Directive Furthermore the manufacturer must maintain a copy of the modules documentation and ensure the final product does not exceed the specified power ratings antenna specifications and or installation Atmel Atmel SAM R21 Xplained Pro USER GUIDE 19 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 6 3 6 4 requirements as specified in the user manual If of these specifications exceeded in the final product a submission must be made to a notified body for compliance testing to all required standards Important E The CE marking must be affixed to a visible location on the OEM product The CE mark shall consist of the initials CE taking the following form CE marking must have a height of at least 5mm except where this is not possible on account of the nature of the apparatus CE marking must be affixed visibly legibly and indelibly More detailed information about CE marking requirements you can find at DIRECTIVE 1999 5 EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL on 9 March 1999 at section 12 Canada IC This device complies with Industry Canada licence exempt RSS standard s Operation is subject to the following two conditions 1 this device may not cause interference and 2 this device must accept any interference including interference that may cause undesired operation of the device Le pr sent appareil est confor
21. e to GND Table 4 7 Mechanical Buttons Pin on SAM R21 RESETN RESET PA28 SWO 423 LED There is one yellow LED available on the SAM R21 Xplained Pro board that can be turned on and off The LED can be activated by driving the connected line to GND Table 4 8 LED Connections Pin on SAM R21 PA19 Yellow LEDO 424 USB The SAM R21 Xplained Pro has a Micro USB receptable for use with the SAM R21 USB module To be able to detect when a USB cable is connected a GPIO ADC is used to detect the VBUS voltage on the connector Table 4 9 USB Connections Pin SAM R21 USB PAO7 VBUS Detection PA24 USB D PA25 USB D 425 RF main feature of SAM R21 Xplained Pro is to show the RF capability of the ATSAMR21G18A device This device has bidirectional 1000 differential antenna pins which are fed through a balun Johanson Technology 2450BM 15A0015 to create a single 500 unbalanced output input This kit has a passive analog RF switch Skyworks Solutions Inc 5222 921 connected to the unbalanced output of the Atmel Atmel SAM R21 Xplained Pro USER GUIDE 14 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 4 3 balun The switch is driven by the RFCTRL1 and RFCTRL2 pins of the ATSAMR21G18A which feature Antenna Diversity to enable the device to automatically select the best signal from two antennas can also be selected manually The output of the switch i
22. including but not limited to Research and Development engineers wants to configure the power settings higher than those specified in page 7 of the FCC test report number 19660076 001 they are advised to use the antenna device only in a shielded room Atmel Atmel SAM R21 Xplained Pro USER GUIDE 21 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 7 Hardware Revisions and Known Issues 7 1 Identifying Product ID and Revision The revision and product indentifier of Xplained Pro boards can be found in two ways either through Atmel Studio or by looking at the sticker on the bottom side of the PCB By connecting an Xplained Pro MCU board to a computer with Atmel Studio running an information window will pop up The first six digits of the serial number which is listed under kit details contain the product identifier and revision Information about connected Xplained Pro extension boards will also appear in the Atmel Kit s window The same information can be found on the sticker on the bottom side of the PCB Most kits will print the identifier and revision in plain text as A09 nnnn rr where nnnn is the identifier and rr is the revision Boards with limited space have a sticker with only a QR code which contains a serial number string The serial number string has the following format nnnnrrssssssssss n product identifier r revision 5 serial number The product indentifier for SAM R21 Xplained Pro is A09 2127 7 2 Revision 3 Revisio
23. me aux CNR d Industrie Canada applicables aux appareils radio exempts de licence L exploitation est autoris e aux deux conditions suivantes 1 l appareil ne doit pas produire de brouillage et 2 l utilisateur de l appareil doit accepter tout brouillage radio lectrique subi m me si le brouillage est susceptible d en compromettre le fonctionnement This equipment complies with radio frequency exposure limits set forth by Industry Canada for an uncontrolled environment This equipment should be installed and operated with minimum distance 20cm between the device and the user or bystanders Cet quipement est conforme aux limites d exposition aux radiofr quences d finies par Industrie Canada pour un environnement non contr l Cet quipement doit tre install et utilis avec un minimum de 20cm de distance entre le dispositif et l utilisateur ou des tiers Important Any changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment List of Antennas Tested With This Product Table 6 1 List of Tested Antennas Antenna number Make NN Model part Antenna gain dBi Type of antenna Antenna 1 Johanson Technology 2450AT18D0100 1 5 Ceramic Antenna Antenna 2 Techfun Co Ltd 01 552 OdBi External Antenna Atmel Atmel SAM R21 Xplained Pro USER GUIDE 20 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 Important If professional users
24. munication over the interfaces is bidirectional It can be used to send events and values from the ATSAMR21G18A or as a generic printf style data channel Traffic over the interfaces can be timestamped on the EDBG for more accurate tracing of events Note that timestamping imposes an overhead that reduces maximal throughput Atmel Data Visualizer is used to send and receive data through DGI The EDBG controls two LEDs on SAM R21 Xplained Pro a power LED and a status LED Table 3 1 EDBG LED Control on page 7 shows how the LEDs are controlled in different operation modes Table 3 1 EDBG LED Control Operation Mode Power LED Status LED Normal operation Power LED is lit when power is Activity indicator LED flashes applied to the board when any communication happens to the EDBG Bootloader mode idle The power LED and the status LED blinks simultaneously Bootloader mode firmware The power LED and the status LED blinks in an alternating pattern upgrade For further documentation on the EDBG see the EDBG User Guide Atmel Atmel SAM R21 Xplained Pro USER GUIDE 7 Atmel 42243C SAM R21 Xplained Pro User Guide 09 2015 3 2 Hardware Identification System All Xplained Pro compatible extension boards have an Atmel ATSHA204 CryptoAuthentication chip mounted This chip contains information that identifies the extension with its name and some extra data When an Xplained Pro extension is connected to an Xplained Pro MCU board the information is re
25. n 3 of SAM R21 Xplained Pro is the initial released version The VDDCORE capacitor C312 is mounted as 100nF on the SAM R21 Xplained Pro evaluation kit while the ATSAMR21G18A datasheet recommends Using 100nF for VDDCORE decoupling may create unwanted noise ripple on the VDDCORE voltage Fix Workaround Use a 1uF capacitor for new designs Atmel Atmel SAM R21 Xplained Pro USER GUIDE 22 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 Appendix 8 1 Atmel Getting Started with IAR Embedded Workbench for ARM is a proprietary high efficiency compiler not based GCC Programming and debugging of Xplained Pro kits are supported in IAR Embedded Workbench for ARM using the common CMSIS DAP interface Some initial settings have to be set up in the project to get the programming and debugging to work The following steps will explain how to get your project ready for programming and debugging 1 Make sure you have opened the project you want to configure Open the OPTIONS dialog for the project In the category General Options select the Target tab Select the device for the project or if not listed the core of the device In the category Debugger select the Setup tab Select CMSIS DAP as the driver In the category Debugger select the Download tab Check the check box for Use flash loader s option In the category Debugger CMSIS DAP select the Setup tab Select System default as the reset method
26. perating in conjunction with any other antenna or transmitter Installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance This device is approved as a mobile device with respect to RF exposure compliance and may only be marketed to OEM installers Use in portable exposure conditions FCC 2 1093 requires separate equipment authorization Important E Modifications not expressly approved by this company could void the user s authority to operate this equipment FCC section 15 21 Important This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense FCC section 15 105 European Union ETSI The SAM R21 Xplained Pro Evaluation kits has been certified for use in European Union countries A Declaration of Conformity must be issued for each of these standards and kept on fil
27. purpose I O 7 PWM Pulse width modulation alternatively positive part of differential PWM 8 PWM Pulse width modulation alternatively negative part of differential PWM 9 IRQ GPIO Interrupt request line and or general purpose I O 10 SPI SS B Slave select for SPI and or general purpose I O GPIO 11 2 SDA Data line for 2 interface Always implemented bus type 12 2 608 Clock line for I C interface Always implemented bus type 13 UART RX Receiver line of target device UART 14 UART TX Transmitter line of target device UART Atmel Atmel SAM R21 Xplained Pro USER GUIDE 9 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 Pin number Description 4 5 SPI SS A Slave select for SPI Should preferably be unique 16 SPI MOSI Master out slave in line of serial peripheral interface Always implemented bus type 17 SPI MISO Master in slave out line of serial peripheral interface Always implemented bus type 18 SPI SCK Clock for serial peripheral interface Always implemented bus type 19 GND Ground 20 VCC Power for extension board 3 4 28 Xplained Pro Power Header The power header can be used to connect external power to the SAM R21 Xplained Pro kit The kit will automatically detect and switch to any external power if supplied The power header can also be used as supply for external peripherals or extension boards Care must be taken not to exceed the total cur
28. rent limitation of the on board regulator when using the 3 3V pin Table 3 5 Xplained Pro Power Header Pin number Pin name Description 1 VEXT_P5V0 External 5V input 2 GND Ground 3 VCC P5VO Unregulated 5V output derived from one of the input sources 4 VCC P3V3 Regulated 3 3V output used as main power supply for the kit Atmel Atmel SAM R21 Xplained Pro USER GUIDE Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 10 4 1 Hardware User Guide Connectors This chapter describes the implementation of the relevant connectors and headers on SAM R21 Xplained Pro and their connection to the ATSAMR21G18A The tables of connections in this chapter also describes which signals are shared between the headers and on board functionality Xplained Pro Extension Headers The SAM R21 Xplained Pro headers EXT1 and EXT3 offer access to the I O of the microcontroller in order to expand the board e g by connecting extensions to the board These headers all comply with the standard Xplained Pro extension header specification All headers have a pitch of 2 54mm Table 4 1 Extension Header EXT1 Pin on EXT1 SAM R21 pin Function Shared functionality 1 ID Communication line to ID chip on extension board 2 GND GND 3 ADC 06 AIN 6 4 ADC 07 AIN 7 5 GPIO 1 PA13 GPIO 6 GPIO2 PA28 GPIO 7 PWM PA18 WO 2 8 PWM 19 TCCO WO 3
29. s Embedded Debugger on page 7 Atmel Atmel SAM R21 Xplained Pro USER GUIDE 17 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 5 Kit Specific Data One of the user pages in the EDBG is programmed with data specific to the SAM R21 Xplained Pro The data can be read through the 12C interface connected to the EDBG For detailed information see the EDBG User Guide All data is stored as little endian Table 5 1 MAC64Register Offset 0x00 Description Size bits MAC64 MAC64 Address hex 64 Atmel Atmel SAM R21 Xplained Pro USER GUIDE 18 Atmel 42243C SAM R21 Xplained Pro_User Guide 09 2015 6 1 6 2 Agency Certification United States FCC This equipment complies with Part 15 of the FCC rules and regulations To fulfill FCC Certification requirements an OEM manufacturer must comply with the following regulations 1 This equipment SAM R21 Xplained Pro is for use for evaluation purposes only and must not be incorporated into any other device or system Important This equipment complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation FCC 15 19 The internal external antenna s used for this mobile transmitter must provide a separation distance of at least 20cm from all persons and must not be colocated or o
30. s connected to a ceramic chip antenna Johanson Technology 2540AT18D0100 and SMA connector for external antennas Table 4 10 RF Connections RFP RF balanced output positive RF balanced output negative PA09 RFCTRL1 RF switch control signal negative EDBG PA12 RFCTRL2 RF switch control signal positive EDBG 1 8V Operation The SAM R21 Xplained Pro board is operated at 3 3V by default but it also has the possibility of running at lower voltages from an external supply The EDBG is designed to run from a 3 3V supply and won t work on other voltages therefore all connections from the EDBG and the on board 3 3V regulator to the ATSAMR21G18A have to be removed Figure 4 1 1 8V Operation Modifications on page 16 shows all components that have to be removed for 1 8V operation When the components are removed the kit can be supplied with a desired voltage through the pins marked 3V3 pin four and GND pin two on the power header described in Xplained Pro Power Header on page 10 To program and debug the ATSAMR21G18A a 2x5 50mil header has to be mounted above EXT1 as shown in Figure 1 1 SAM R21 Xplained Pro Evaluation Kit Overview on page 5 Note Operating the SAM R21 Xplained Pro on other voltages than 3 3V requires physical modifications on the kit using a soldering iron and an external debugger for programming the ATSAMR21G18A The on board LED is selected for 3 3V operation the light level at 1 8V operation is very low
31. s specifically designated by Atmel as military grade Atmel products are not designed nor intended for use in automotive applications unless specifically designated by Atmel as automotive grade
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