Microchip technology Sam r30 xplained pro User manual

ATSAMR30-XPRO

SAM R30 Xplained Pro

Description

The SAM R30 Xplained Pro is a hardware platform designed to evaluate the ATSAMR30G18A SoC. This

kit is supported by Atmel Studio, an integrated development platform, which provides predefined

application examples.This kit provides easy access to various features of the ATSAMR30G18A SoC, and

offers additional peripherals to extend the features of the board and ease the development of custom

designs.

Figure 1. SAM R30 Xplained Pro Evaluation Kit

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Table of Contents

Description.......................................................................................................................1

1. Introduction................................................................................................................4

1.1. Features....................................................................................................................................... 4

1.2. Kit Overview................................................................................................................................. 4

2. Getting Started.......................................................................................................... 6

2.1. Xplained Pro Quick Start.............................................................................................................. 6

3. Xplained Pro.............................................................................................................. 8

3.1. Embedded Debugger................................................................................................................... 8

3.2. Xplained Pro Analog Module (XAM).............................................................................................9

3.3. Hardware Identification System..................................................................................................11

3.4. Power Sources........................................................................................................................... 11

3.5. Xplained Pro Headers and Connectors......................................................................................12

4. Hardware User Guide..............................................................................................14

4.1. Power Distribution...................................................................................................................... 14

4.2. Connectors.................................................................................................................................14

4.3. Peripherals................................................................................................................................. 18

4.4. Embedded Debugger Implementation........................................................................................19

4.5. Kit Modifications......................................................................................................................... 22

5. Agency Certification.................................................................................................26

5.1. United States (FCC)................................................................................................................... 26

5.2. European Union (RED [Radio Equipment Directive]).................................................................26

5.3. List of Antennas Tested With This Product.................................................................................27

6. Appendix..................................................................................................................28

6.1. Getting Started with IAR.............................................................................................................28

6.2. Connecting External Debuggers to an Xplained Pro Board....................................................... 31

7. Hardware Revision History and Known Issues........................................................33

7.1. Identifying Product ID and Revision........................................................................................... 33

7.2. Hardware Revision..................................................................................................................... 33

7.3. Known Issues............................................................................................................................. 33

8. Document Revision History..................................................................................... 34

The Microchip Web Site................................................................................................ 35

Customer Change Notification Service..........................................................................35

Customer Support......................................................................................................... 35

Microchip Devices Code Protection Feature................................................................. 35

ATSAMR30-XPRO

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Legal Notice...................................................................................................................36

Trademarks................................................................................................................... 36

Quality Management System Certified by DNV.............................................................37

Worldwide Sales and Service........................................................................................38

ATSAMR30-XPRO

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1. Introduction

1.1 Features

• Kit Supports 868MHz and 915MHz Dual (Wideband) ISM Band

• On-Board Embedded Debugger (EDBG):

– Auto-ID for board identification in Studio

– One status LED (yellow)

– One power supply LED (green)

– Symbolic debug of complex data types including scope information

– Programming and debugging including power measurements

– Data Gateway Interface: Serial Peripheral Interface (SPI) bus, Inter-Integrated Circuit (I2C)

and four General Purpose Input/Outputs (GPIOs)

– Virtual COM Port (CDC)

• Embedded Current Measurement Circuitry with Data Visualizer Support for Data Visualization

• Two Mechanical Buttons (User-Configurable Button and RESET Button)

• Two User LEDs (Soft Orange and Green)

• One QTouch® Button

• USB Interface, Device and Reduced Host Mode

• Two Xplained Pro Extension Headers

• Antenna:

– One ceramic chip antenna (Johanson Technology – 0900AT43A0070)

– One SMA connector for external antenna

• Three Possible Power Sources:

– External power

– Embedded Debugger (EDBG) USB

– TARGET USB

• Clock Source:

– 32.768 kHz crystal, a clock source for the controller in the SAM R30 device

– 16 MHz crystal for the RF die in the SAM R30 device

• Supported with application examples in the Atmel Software Framework

1.2 Kit Overview

The SAM R30 device is an ARM-based, ultra low-power microcontroller (MCU) equipped with an IEEE®

802.15.4-2003/2006/2011 standard that is compliant with RF interfaces for the sub-1GHz frequency

bands, such as 780 MHz (China), 868 MHz (Europe), and 915 MHz (North America). It uses the 32-bit

ARM® Cortex®- M0+ processor, which operates at a maximum of 48 MHz (2.46 CoreMark®/MHz) and

offers 256KB of Flash and 40KB of SRAM in both 32-pin and 48-pin packages.

The SAM R30 device supports the following power managaement techniques to reduce current

consumption:

• Power Gating

• SleepWalking

ATSAMR30-XPRO

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• Ultra low-power peripherals, etc.

The kit is designed to work with the ATSAMR30G18A SoC that supports dual ISM band 868 MHz

(Europe) and 915 MHz (North America).

Figure 1-1. SAM R30 Xplained Pro Evaluation Kit

ATSAMR30-XPRO

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2. Getting Started

This chapter describes how to get started with the Xplained Pro evaluation platform and how to find

design documentation and other relevant links.

2.1 Xplained Pro Quick Start

Steps to start exploring the Xplained Pro platform:

1. Download and install Atmel Studio.

2. Launch Atmel Studio.

3. Connect the DEBUG USB port on the evaluation kit to the computer using a USB cable (Standard-

A to Micro-B or Micro-AB).

The operating system installs the driver software automatically the first time the Xplained Pro evaluation

kit is connected to a PC. This driver supports 32-bit and 64-bit versions of Microsoft® Windows® XP,

Windows Vista®, Windows 7, Windows 8, Windows 10, and Windows Server 2012.

When the Xplained Pro MCU board is powered, the power LED (green) glows and Atmel Studio

automatically detects the specific Xplained Pro MCU and extension board(s) that are connected. The kit

landing page in Atmel Studio comes with an option to launch Atmel Software Framework (ASF) and

Atmel START example application codes for the kit. The SAM R30 device is programmed and debugged

by the on-board Embedded Debugger and therefore no external programmer or debugger tool is

required.

2.1.1 Design Documentation and Relevant Links

The following list contains links to the most relevant documents and software for the SAM R30 Xplained

Pro.

•Xplained products - Xplained evaluation kits are a series of easy-to-use evaluation kits for

Microchip microcontrollers and other Microchip products.

– Xplained Nano: used for low pin-count devices and provides a minimalistic solution with

access to all I/O pins of the target microcontroller.

– Xplained Mini: used for medium pin-count devices and adds Arduino Uno compatible header

footprint and a prototyping area.

– Xplained Pro: used for medium to high pin-count devices that features advanced debugging

and standardized extensions for peripheral functions.

Note: All the above kits have on-board programmers/debuggers, which creates a set of low-cost

boards for evaluation and demonstration of features and capabilities of different Microchip products.

•Atmel Studio - Free IDE for development of C/C++ and assembler code for microcontrollers.

•Microchip sample store - Microchip sample store where you can order samples of devices.

•EDBG User Guide - User guide containing more information about the on-board Embedded

Debugger.

•IAR 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 M0, M0+, and M1 cores

and 32KB for devices with other cores.

•QTouch® tools - A collection of tools to design capacitive touch applications.

ATSAMR30-XPRO

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•Data Visualizer - Data Visualizer is a program used for processing and visualizing data. The 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.

ATSAMR30-XPRO

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3. Xplained Pro

Xplained Pro is an evaluation platform which contains a series of microcontroller boards (evaluation kits)

and extension boards. Atmel Studio is used to program and debug the microcontrollers on these boards.

Atmel Studio includes ASF and Atmel START, which has drivers and demo code, and Data Visualizer,

which supports data streaming and advanced debugging. Xplained Pro evaluation kits can be connected

to a wide range of Xplained Pro extension boards through standardized headers and connectors.

Xplained Pro extension boards have identification (ID) chips to uniquely identify which boards are

connected to the Xplained Pro evaluation kits.

3.1 Embedded Debugger

The SAM R30 Xplained Pro contains an Embedded Debugger (EDBG) for on-board debugging. The

EDBG is a USB composite device with the following interfaces:

• Debugger

• Virtual COM Port

• Data Gateway Interface (DGI)

The EDBG can program and debug the ATSAMR30G18A with the help of Atmel Studio. The SWD

interface is connected between the EDBG and the ATSAMR30G18A on the SAM R30 Xplained Pro.

The Virtual COM Port is connected to a UART on the ATSAMR30G18A 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 ATSAMR30G18A must match the settings given in the

terminal software.

Info: The Virtual COM Port in the EDBG requires the terminal software to set the Data

Terminal Ready (DTR) signal to enable the UART pins connected to the ATSAMR30G18A. If the

DTR signal is not enabled, the UART pins on the EDBG are kept in tri-state (high-z) to render

the COM Port not usable. The DTR signal is automatically set by some terminal software, but it

may have to be manually enabled in your terminal.

The DGI consists of several physical interfaces for bidirectional communication with the host computer.

Communication over the interfaces is bidirectional. It can be used to send event values, and data from

the ATSAMR30G18A. Traffic over the interfaces can be timestamped by the EDBG for more accurate

tracing of events, but timestamping reduces the maximal data throughput. The Data Visualizer is used to

send and receive data through DGI.

The EDBG controls two LEDs on the SAM R30 Xplained Pro: a power LED and a status LED. The table

below shows how the LEDs are controlled in different operation modes.

ATSAMR30-XPRO

Table 3-1. EDBG LED Control

Mode Power LED Status LED

Normal mode The power LED is on when

power is applied to the board.

Activity indicator, the LED flashes

when any communication

happens to the EDBG.

Bootloader mode (idle) The power LED and the status LED blink simultaneously.

Bootloader mode (firmware

upgrade)

The power LED and the status LED blink in an alternating pattern.

For more details on the EDBG, see the EDBG User Guide.

3.2 Xplained Pro Analog Module (XAM)

3.2.1 Overview

The Xplained Pro Analog Module (XAM) extends the embedded debugger with high dynamic range

current measurement. This enables power profiling of the target system.

Figure 3-1. XAM Block Diagram

ADC0

ADC1

20x

voltage

reference

2.7V

Control MCU

GND

S&H

ADC

Calibration

circuitry

Calibration ON/OFF

AREF

GPIO

GPIO(s)

GPIO

100 mOhm

100 Ohm

EDBG

SPI

Clock sync

SWD

Sync GPIO

I2C

16x

Current input

Current output

Range selection

Pre-amplifier

Active filter with

gain

Xplained Pro Analog Module (XAM)

20x

The XAM consists of:

• Calibration circuitry

• Voltage reference circuitry

• Analog front-end:

– Shunt resistors with a range selection switch

– Pre-amplifier

– Two active filters with gain

• Control MCU

ATSAMR30-XPRO

– Analog-to-Digital Converter

– Signal processing

– Control/communication interface to the EDBG

The current measurement front-end is a high side shunt measurement with a pre-amplifier and a second

active filter stage with gain as shown in Figure 3-1. The wide dynamic range is achieved by four

measurement ranges, which are defined by two shunt resistors and the two parallel second stage active

filters with gain.

3.2.2 EDBG Interface

The XAM is connected to the EDBG with the following interfaces:

•I2C: This is used to control and configure the XAM.

•SPI: Current measurement data is streamed to the EDBG via this interface. This is a unidirectional

channel from the XAM to the EDBG.

•SWD: The MCU in the XAM is programmed via SWD from the EDBG.

•Clock sync: Signal used to synchronize ADC measurements with the EDBG.

•Reference clock: Reference clock for the XAM.

3.2.3 Sample Rate

The raw sampling rate of the XAM is up to 250 kHz and with the default averaging configuration (average

of 16 samples), the actual output of the XAM is 16.67 ksps.

Info: The XAM output sample rate is not an integer fraction of the raw sampling.

3.2.4 Measurement Ranges and Accuracy

The XAM has four measurement ranges. These are defined by two shunt resistors and two gain stages.

Table 3-2. XAM Measurement Ranges and Accuracy

Measurement

Range

Hardware Resolution Accuracy Comments

Range 1 Low current shunt and

high gain stage

20 nA 1 LSB ±1% Accuracy will decrease below

1μA. Typical accuracy for

300nA is 1 LSB ± 10%.

Range 2 Low current shunt and

low gain stage

150 nA 1 LSB ±1%

Range 3 High current shunt and

high gain stage

10 μA 1 LSB ±1%

Range 4 High current shunt and

low gain stage

100 μA 1 LSB ±1% Accuracy will decrease

above 100 mA. Typical

accuracy is 1 LSB ±5% at

400 mA. Maximum current is

400 mA.

ATSAMR30-XPRO

The ranges are automatically switched by the XAM to achieve the best measurement results and the

currently active range is visualized in the Data Visualizer front-end tool. The maximum voltage drop over

the shunt resistor is 100 mV, and the XAM switches the range automatically before reaching this limit.

3.3 Hardware Identification System

All Xplained Pro extension boards come with an identification chip (ATSHA204A CryptoAuthentication

chip) to uniquely identify the boards that are connected to the Xplained Pro evaluation kit. 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 evaluation kit, the information is read and sent to Atmel

Studio. The following table shows the data fields stored in the ID chip with example content.

Table 3-3. 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 1774020200000010’\0’

Minimum Voltage [mV] uint16_t 3000

Maximum Voltage [mV] uint16_t 3600

Maximum Current [mA] uint16_t 30

3.4 Power Sources

The SAM R30 Xplained Pro kit can be powered by several power sources, as listed in the table below.

Table 3-4. Power Sources for SAM R30 Xplained Pro

Power Source Voltage Requirements Current Requirements Connector Marking

External Power 5V ±2% (±100mV) for

USB host operation.

4.3V to 5.5V if a USB

host operation is not

required.

In USB host applications

a minimum of 1A is

recommended to supply

the kit and the USB

device.

Maximum recommended

current is 2A.

PWR

Embedded debugger

USB

4.4V to 5.25V (according

to USB spec.)

500 mA (according to

USB spec.)

DEBUG USB

Target USB 4.4V to 5.25V (according

to USB spec.)

500 mA (according to

USB spec.)

TARGET USB

The kit automatically detects which power sources are available and chooses which one to use according

to the following priority:

1. External power.

ATSAMR30-XPRO

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.

3.5 Xplained Pro Headers and Connectors

3.5.1 Xplained Pro Standard Extension Header

All Xplained Pro kits have one or more dual row, 20-pin, 100-mil extension header. The Xplained Pro

MCU boards have male headers, while the Xplained Pro extensions have their female counterparts. All

connected pins follow the defined pin description in the table.

Info: All pins are not always connected on all extension headers.

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 microcontroller on Xplained Pro MCU boards directly.

Table 3-5. Xplained Pro Standard Extension Header

Pin Number Pin Name Description

1 ID Pin to communicate with the ID chip on an extension board

2 GND Ground

3 ADC(+) Analog-to-Digital Converter; alternatively, a pin for the positive

terminal of a differential ADC

4 ADC(-) Analog-to-Digital Converter; alternatively, a pin for the negative

terminal of a differential ADC

5 GPIO1 General purpose I/O pin

6 GPIO2 General purpose I/O pin

7 PWM(+) Pulse width modulation; alternatively, a pin for the positive part of a

differential PWM

8 PWM(-) Pulse width modulation; alternatively, a pin for the negative part of a

differential PWM

9 IRQ/GPIO Interrupt request pin and/or general purpose I/O pin

10 SPI_SS_B/

GPIO

Slave select pin for Serial Peripheral Interface (SPI) and/or general

purpose I/O pin

11 I2C_SDA Data pin for I2C interface. Always connected, bus type

12 I2C_SCL Clock pin for I2C interface. Always connected, bus type

ATSAMR30-XPRO

Pin Number Pin Name Description

13 UART_RX Receiver pin of target device UART

14 UART_TX Transmitter pin of target device UART

15 SPI_SS_A Slave select for SPI. This pin should preferably not be connected to

anything else.

16 SPI_MOSI SPI master out slave in pin. Always connected, bus type

17 SPI_MISO SPI master in slave out pin. Always connected, bus type

18 SPI_SCK SPI clock pin. Always connected, bus type

19 GND Ground pin for extension boards

20 VCC Power pin for extension boards

3.5.2 Xplained Pro Power Header

The power header can be used to connect external power to the SAM R30 Xplained Pro kit. The kit

automatically detects and switches to any external power if supplied. The power header can also be used

to supply power to external peripherals or extension boards. Ensure that the total current does not

exceed the recommended current limit of the on-board regulator when using the 3.3V pin.

Table 3-6. Xplained Pro Power Header

Pin Number Pin Name Description

1 VEXT_P5V0 External 5V input pin

2 GND Ground pin

3 VCC_P5V0 Unregulated 5V pin (an output, derived from one of the input

sources)

4 VCC_P3V3 Regulated 3.3V pin (an output, used as main power supply

for the kit)

ATSAMR30-XPRO

4. Hardware User Guide

4.1 Power Distribution

The SAM R30 Xplained Pro can be powered by:

• EDBG USB

• TARGET USB

• External (5V)

The kit has a power mux which automatically chooses the power source if two or all three of the power

sources are available to the kit at the same time.

The kit contains:

• Two on-board voltage regulators (3.3V):

– One for an EDBG and XAM section

– Another one for ATSAMR30G18A SoC

• IO peripherals

• Power Measurement Section (XAM)

Figure 4-1. Power Supply Block Diagram

4.2 Connectors

The following sections describe the implementation of the relevant connectors and headers on the SAM

R30 Xplained Pro and their connection to the ATSAMR30G18A. The following figure shows all the

available connectors and jumpers on the SAM R30 Xplained Pro.

ATSAMR30-XPRO

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Figure 4-2. SAM R30 Xplained Pro Connector Overview

4.2.1 Xplained Pro Extension Headers

The SAM R30 Xplained Pro headers EXT1 and EXT3 offer access to the I/O of the MCU in order to

expand the board by connecting extensions to the board. These headers are based on the standard

extension header specified in the table below. The headers have a pitch of 2.54 mm.

Table 4-1. Extension Header EXT1

EXT1 Pin SAM R30

Function Shared Functionality

1 [ID] - - Pin to communicate with the ID

chip on an extension board

2 [GND] - - Ground

3 [ADC(+)] PA06 AIN[6]

4 [ADC(-)] PA07 AIN[7] USB

5 [GPIO1] PA13 GPIO

6 [GPIO2] PA28 GPIO SW0

7 [PWM(+)] PA18 TCC0/WO[2] LED1

8 [PWM(-)] PA19 TCC0/WO[3] LED0

9 [IRQ/GPIO] PA22 EXTINT[6]

10 [SPI_SS_B/GPIO] PA23 GPIO SW0

11 [TWI_SDA] PA16 SERCOM1 PAD[0] I²C SDA EXT3 and EDBG I²C

12 [TWI_SCL] PA17 SERCOM1 PAD[1] I²C SCL EXT3 and EDBG I²C

13 [USART_RX] PA05 SERCOM0 PAD[1] UART RX Virtual COM Port

14 [USART_TX] PA04 SERCOM0 PAD[0] UART TX Virtual COM Port

15 [SPI_SS_A] PB03 SERCOM5 PAD[1] SPI SS

16 [SPI_MOSI] PB22 SERCOM5 PAD[2] SPI MOSI EXT3 and EDBG SPI

ATSAMR30-XPRO

EXT1 Pin SAM R30

Function Shared Functionality

17 [SPI_MISO] PB02 SERCOM5 PAD[0] SPI MISO EXT3 and EDBG SPI

18 [SPI_SCK] PB23 SERCOM5 PAD[3] SPI SCK EXT3 and EDBG SPI

19 [GND] - - Ground

20 [VCC] - - Power for extension board

Table 4-2. Extension Header EXT3

EXT3 Pin SAM R30

Function Shared Functionality

1 [ID] - - Pin to communicate with the ID

chip on an extension board

2 [GND] - - Ground

3 [ADC(+)] - -

4 [ADC(-)] - -

5 [GPIO1] PA15 GPIO USB

6 [GPIO2] - -

7 [PWM(+)] - -

8 [PWM(-)] - -

9 [IRQ/GPIO] - -

10 [SPI_SS_B/GPIO] PA08 GPIO EDBG DGI GPIO

11 [TWI_SDA] PA16 SERCOM1 PAD[0] I²C SDA EXT1 and EDBG I²C

12 [TWI_SCL] PA17 SERCOM1 PAD[1] I²C SCL EXT1 and EDBG I²C

13 [USART_RX] - -

14 [USART_TX] - -

15 [SPI_SS_A] PA14 GPIO EDBG DGI GPIO

16 [SPI_MOSI] PB22 SERCOM5 PAD[2] SPI MOSI EXT1 and EDBG SPI

17 [SPI_MISO] PB02 SERCOM5 PAD[0] SPI MISO EXT1 and EDBG SPI

18 [SPI_SCK] PB23 SERCOM5 PAD[3] SPI SCK EXT1 and EDBG SPI

19 [GND] - - Ground

20 [VCC] - - Power for extension board

4.2.2 USB

A Micro-USB is used for connecting the SAM R30 board (TARGET USB port) with a host PC.To be able

to detect when a TARGET USB cable is connected in self-powered mode, a GPIO is used to detect the

VBUS voltage on the connector. In USB host mode, VBUS voltage is provided by the kit and cannot

identify the connected device, so another GPIO is used to detect the USB ID of the device.

ATSAMR30-XPRO

Table 4-3. USB Connections

SAM R30 Pin USB Function Shared Functionality

PA07 VBUS Detection EXT1

PA15 USB ID EXT3

PA24 USB D- -

PA25 USB D+ -

4.2.3 Current Measurement Header

An angled 1x2, 100-mil pin header marked with the MCU current measurement is located at the upper

edge of the SAM R30 Xplained Pro. All power to the ATSAMR30G18A is exclusively routed through this

header (excluding power to headers and peripherals). 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

ATSAMR30G18A to be powered through its I/O pins. This may cause permanent damage to the

device.

4.2.4 Cortex Debug Connector

The SAM R30 Xplained Pro contains a 10-pin 50-mil Cortex® Debug Connector that can be used to

attach an external debugger to the ATSAMR30G18A SoC.

Table 4-4. Cortex Debug Connector

Cortex Debug

Connector Pin

Pin / Net Function Shared Functionality

1 VCC_TARGET_P3V3 ATSAMR30G18A

voltage

2 PA31 SWD data signal EDBG SWD

3 GND Ground

4 PA30 SWD clock signal EDBG SWD

5 GND Ground

6 - -

7 - -

8 - -

9 GND Ground

10 RESETN Target reset signal

ATSAMR30-XPRO

4.3 Peripherals

4.3.1 Crystal

The SAM R30 Xplained Pro kit contains a 32.768 kHz crystal that can be used as a clock source for the

SAM R30 device. A cut-strap next to the crystal is 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 the AVR4100 application note from Microchip.

Info: The 16 MHz crystal is connected directly to the RF die inside the SAM R30. The clock

signal generated by this crystal is routed from the CLKM pin on the RF die to a GCLK I/O 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 R30 datasheet.

Table 4-5. External 32.768 kHz Crystal

Pin on SAM R30 Function

PA00 XIN32

PA01 XOUT32

Table 4-6. External 16 MHz Crystal

Pin on SAM R30 Function

XTAL1 XIN

XTAL2 XOUT

4.3.2 Mechanical Buttons

The SAM R30 Xplained Pro contains two mechanical buttons.

• The RESET button is connected to the SAM R30 reset line:

– When the RESET button is pressed, it drives the reset line to ground

• Generic user configurable button:

– When the user button is pressed, it drives the I/O line to ground

note: There is no pull-up resistor connected to the generic user button. Remember to enable

the internal pull-up in the SAM R30 to use the button.

Table 4-7. Mechanical Buttons

SAM R30 Pin Silkscreen Text Shared Functionality

RESET RESET -

PA28 SW0 EXT1

4.3.3 LEDs

The SAM R30 Xplained Pro board contain two LEDs. The LEDs can be activated by driving the

connected I/O line to ground (GND).

ATSAMR30-XPRO

Table 4-8. LED Connections

SAM R30 Pin Function Shared Functionality

PA19 LED0 (Color: Soft Orange) EXT3

PA18 LED1 (Color: Green) EXT3

4.3.4 QTouch Button

The SAM R30 Xplained Pro board contains a self capacitance button, which can be used as an I/O. This

QTouch button is intended to be driven by the built-in Peripheral Touch Controller (PTC) of the device. A

zero ohm resistor is added on the board to easily disconnect the on-board touch buttons from the

extension header since the I/O lines are shared between the QTouch button and extension header 1

(EXT1).

note: To get started with QTouch, refer to the QTouch® Library and QTouch® Composer.

Table 4-9. QTouch Connection

SAM R30 Pin Silkscreen Text Shared Functionality

PA06 QT BTN1 EXT1

4.3.5 RF

The main feature of the SAM R30 Xplained Pro is to show the RF capability of the ATSAMR30G18A SoC.

This device has bidirectional 100 ohm differential antenna pins, which are fed through a balun (Johanson

Technology, 0896BM15A0032) to create a single 50 ohm unbalanced output/input. This kit has a passive

analog RF switch (Skyworks Solutions Inc, AS222-92LF) connected to the unbalanced output of the

balun. The switch is driven by the RFCTRL1 and RFCTRL2 pins of the ATSAMR30G18A, which feature

Antenna Diversity to enable the device to automatically select the best signal from the two antennas (can

also be selected manually). The output of the switch is connected to a ceramic chip antenna (Johanson

Technology, 0900AT43A0070) and an SMA connector for external antennas.

Table 4-10. RF Connections

SAM R30Pin RF Shared Functionality

RFP RF balanced output (positive)

RFN RF balanced output (negative)

PA09/RFCTRL1 RF switch control signal (negative) EDBG DGI GPIO

PA12/RFCTRL2 RF switch control signal (positive) EDBG DGI GPIO

4.4 Embedded Debugger Implementation

The SAM R30 Xplained Pro contains an Embedded Debugger (EDBG) that can be used to program and

debug the ATSAMR30G18A SoC using Serial Wire Debug (SWD). The Embedded Debugger includes a

Virtual COM Port interface over UART, Data Gateway Interface over SPI, I2C and four GPIOs. The kit

also includes an XAM extension processor to the Embedded Debugger for on-board current

measurement. Atmel Studio can be used as a front-end for the Embedded Debugger.

ATSAMR30-XPRO

4.4.1 Serial Wire Debug

The Serial Wire Debug (SWD) uses two pins to communicate with the target. For further information on

how to use the programming and debugging capabilities of the EDBG, refer to Embedded Debugger.

Table 4-11. SWD Connections

SAM R30 Pin Function Shared Functionality

PA30 SWD clock Cortex debug connector

PA31 SWD data Cortex debug connector

4.4.2 Virtual COM Port

The Embedded Debugger acts as a Virtual COM Port gateway by using one of the ATSAMR30G18A

UARTs. For further information on how to use the Virtual COM Port, refer to Embedded Debugger.

Table 4-12. Virtual COM Port Connections

SAM R30 pin Function Shared functionality

PA04 SERCOM0 PAD[0] UART TXD (SAM

R30 TX line)

EXT1

PA05 SERCOM0 PAD[1] UART RXD (SAM

R30 RX line)

EXT1

4.4.3 Data Gateway Interface

The Embedded Debugger features a Data Gateway Interface (DGI) by using either an SPI or I²C. The

DGI can be used for sending data from the ATSAMR30G18A to the host PC. For further information on

how to use the DGI interface, refer to the Data Visualizer and the EDBG User Guide.

Table 4-13. DGI Interface Connections When Using SPI

SAM R30 Pin Function Shared Functionality

PA27 GPIO/SPI SS (Slave Select) (SAM R30

is Master)

PB02 SERCOM5 PAD[0] SPI MISO (Master

In, Slave Out)

EXT1 and EXT3

PB22 SERCOM5 PAD[2] SPI MOSI (Master

Out, Slave in)

EXT1 and EXT3

PB23 SERCOM5 PAD[3] SPI SCK (Clock Out) EXT1 and EXT3

Table 4-14. DGI Interface Connections When Using I²C

SAM R30 Pin Function Shared Functionality

PA16 SERCOM1 PAD[0] SDA (Data line) EXT1 and EXT3

PA17 SERCOM1 PAD[1] SCL (Clock line) EXT1 and EXT3

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 timestamp events in the SAM R30

application code. For further information on how to configure and use the GPIO monitoring features, refer

to the Data Visualizer and the EDBG User Guide.

ATSAMR30-XPRO

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