ATTINY817-XPRO - MICROCHIP TECHNOLOGY

ATtiny817 Xplained Pro

Preface

The ATtiny817 Xplained Pro evaluation kit is a hardware platform to evaluate the ATtiny817

microcontroller.

Supported by the Atmel Studio integrated development platform, the kit provides easy access to the

features of the ATtiny817 and explains how to integrate the device into a custom design.

Xplained Pro MCU series evaluation kits include on-board Embedded Debuggers. No external tools are

necessary to program or debug the ATtiny817.

Xplained Pro extension kits offers additional peripherals to extend the features of the board and ease the

development of custom designs.

Table of Contents

Preface............................................................................................................................ 1

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

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

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

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

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

2.2. Design Documentation and Relevant Links................................................................................. 6

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

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

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

3.2.1. Overview........................................................................................................................9

3.2.2. EDBG Interface..............................................................................................................9

3.2.3. Sample Rate................................................................................................................10

3.2.4. Measurement Ranges and Accuracy...........................................................................10

3.3. Hardware Identification System..................................................................................................10

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

3.5. Xplained Pro Headers and Connectors...................................................................................... 11

3.5.1. Xplained Pro Standard Extension Header................................................................... 11

3.5.2. Xplained Pro Power Header........................................................................................ 12

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

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

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

4.2.1. Xplained Pro Standard Extension Headers................................................................. 15

4.2.2. UPDI Debug Connector...............................................................................................17

4.3. Peripherals................................................................................................................................. 17

4.3.1. Mechanical Buttons..................................................................................................... 17

4.3.2. Crystal..........................................................................................................................18

4.3.3. LED..............................................................................................................................19

4.3.4. QTouch Button............................................................................................................. 19

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

4.4.1. Unified Program Debug Interface................................................................................ 19

4.4.2. Virtual COM Port..........................................................................................................19

4.4.3. Data Gateway Interface...............................................................................................20

4.4.4. XAM Configuration.......................................................................................................20

4.5. Kit Modifications......................................................................................................................... 21

4.5.1. Connecting the 32 kHz Crystal.................................................................................... 24

4.5.2. Operation at Other Voltages........................................................................................ 24

5. Appendix..................................................................................................................27

5.1. Getting Started with IAR.............................................................................................................27

ATtiny817 Xplained Pro

6. Hardware Revision History and Known Issues........................................................29

6.1. Identifying Product ID and Revision........................................................................................... 29

6.2. Revision 6...................................................................................................................................29

6.3. Revision 5...................................................................................................................................29

6.4. Revision 4...................................................................................................................................29

7. Document Revision History..................................................................................... 30

The Microchip Web Site................................................................................................ 31

Customer Change Notification Service..........................................................................31

Customer Support......................................................................................................... 31

Microchip Devices Code Protection Feature................................................................. 31

Legal Notice...................................................................................................................32

Trademarks................................................................................................................... 32

Quality Management System Certified by DNV.............................................................33

Worldwide Sales and Service........................................................................................34

ATtiny817 Xplained Pro

1. Introduction

1.1 Features

• ATtiny817 microcontroller

• Two mechanical user buttons

• Two QTouch® buttons

• One yellow user LED

• 32.768 kHz crystal

• Two Xplained Pro extension headers

• Embedded Debugger

– Auto-ID for board identification in Atmel Studio

– One yellow status LED

– One green board power LED

– Symbolic debug of complex data types including scope information

– Programming and debugging, including power measurements

– Data Gateway Interface: SPI, I2C, two GPIOs

– Virtual COM Port (CDC)

• Embedded current measurement circuitry (XAM)

– Measures power consumption of the ATtiny817 and/or peripherals

– Measures current between 100 nA and 400 mA

– Current measurement data are shown in Microchip Data Visualizer

• USB powered

• Supported with application examples in Atmel Start

1.2 Kit Overview

The ATtiny817 Xplained Pro evaluation kit is a hardware platform to evaluate the ATtiny817.

The kit offers a set of features that enables the ATtiny817 user to get started with the ATtiny817

peripherals right away and to get an understanding of how to integrate the device into their own design.

ATtiny817 Xplained Pro

Figure 1-1. ATtiny817 Xplained Pro Evaluation Kit Overview

DEBUG USB

POWER

HEADER

EXTENSION 1

HEADER

EXTENSION 3

HEADER

ATTINY817

SW1 USER BUTTON

CURRENT MEASUREMENT

HEADER

SW0 USER BUTTON

USER LED0

32kHz CRYSTAL

QTOUCH BUTTONS

MCU CURRENT

MEASUREMENT

SELECT JUMPER

I/O CURRENT

MEASUREMENT

SELECT JUMPER

UPDI DEBUG

FOR EXTERNAL

DEBUGGER

ATtiny817 Xplained Pro

2. Getting Started

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).

When the Xplained Pro MCU kit is connected to the computer for the first time, the operating system

installs the driver software automatically. 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 the Atmel Studio

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

landing page of the kit in the Atmel Studio has an option to launch the Atmel Software Framework (ASF)

and the Atmel START example application codes for the kit. The ATtiny817 device is programmed and

debugged by the on-board embedded debugger and therefore no external programmer or debugger tool

is required.

2.2 Design Documentation and Relevant Links

The following list contains links to the most relevant documents and software for the ATtiny817 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 the development of C/C++ and assembler code for microcontrollers.

•http://start.atmel.com/ - Atmel START is an online tool that helps the user to select and configure

software components and tailor your embedded application in a usable and optimized manner.

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

Debugger.

•IAR Embedded Workbench® for AVR® - This is a commercial C/C++ compiler that is available for

8-bit AVR. There is a 30 day evaluation version as well as a 4 KB code size limited kick-start

version available from their website.

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

•QTouch® Design Guide - PTC Robustness design guide document for touch sensor development.

ATtiny817 Xplained Pro

•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.

•ATtiny817 Xplained Pro website - Kit information, latest user guide and design documentation.

•ATtiny817 Xplained Pro on Microchip Direct - Purchase this kit on Microchip Direct.

ATtiny817 Xplained Pro

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 Advanced Software Framework (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 ATtiny817 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 ATtiny817 with the help of Atmel Studio. The UPDI interface is

connected between the EDBG and the ATtiny817 on the ATtiny817 Xplained Pro.

The Virtual COM Port is connected to a UART on the ATtiny817 and provides an easy way to

communicate with the target application through terminal software. It offers variable baud rate, parity, and

stop bit settings. The settings on the ATtiny817 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 ATtiny817. 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

ATtiny817. Traffic over the interfaces can be timestamped by the EDBG for more accurate tracking 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 ATtiny817 Xplained Pro, a power LED and a status LED. The

following table provides details on how the LEDs are controlled in different operation modes.

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.

ATtiny817 Xplained Pro

For additional information 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

– 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:

ATtiny817 Xplained Pro

•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

1 μA. Typical accuracy for

300 nA 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.

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 the

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

ATtiny817 Xplained Pro

Table 3-3. Xplained Pro ID Chip Content

Data Field Data Type Example Content

Manufacturer ASCII string Microchip'\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 ATtiny817 Xplained Pro kit can be powered by several power sources, as listed in the table below.

Table 3-4. Power Sources for ATtiny817 Xplained Pro

Power Source Voltage Requirements Current Requirements Connector Marking

External Power 5V ±2% (±100 mV) for

USB host operation.

4.3V to 5.5V if a USB

host operation is not

required.

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

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

to the following priority:

1. External power.

2. Embedded Debugger USB.

Info: External power is required when 500 mA from a USB connector is not enough to power

the board with possible extension boards.

3.5 Xplained Pro Headers and Connectors

3.5.1 Xplained Pro Standard Extension Header

All Xplained Pro kits have many dual row, 20-pin, 100-mil extension headers. 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.

ATtiny817 Xplained Pro

Info: Not all pins are 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 the Xplained Pro boards.

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.

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 ATtiny817 Xplained Pro kit. The kit

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

ATtiny817 Xplained Pro

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)

ATtiny817 Xplained Pro

4. Hardware User Guide

4.1 Power Distribution

ATtiny817 Xplained Pro has two power sources; EDBG USB and external 5.0V. The kit will automatically

select the source to draw power from. The kit has two on-board 3.3V voltage regulators, one for the

EDBG and XAM, and one for the ATtiny817 and other peripherals.

Figure 4-1. Power Supply Block Diagram

VCC_P5V0

EDBG & XAM

ATtiny817

Regulator 3.3V

Power source

Power switch

Power converter

Power consumer

VCC_P3V3

Peripherals

Power

Measurement

Select

External 5V

input

EDBG USB

Auto mux

Regulator 3.3V

Jumper

VCC_MCU

VCC_TARGET

4.2 Connectors

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

ATtiny817 Xplained Pro and their connection to the ATtiny817. The tables of connections in the sections

also describe which signals are shared between the headers and on-board functionality. The figure below

shows all available connectors and jumpers on ATtiny817 Xplained Pro.

ATtiny817 Xplained Pro

Figure 4-2. ATtiny817 Xplained Pro Connector Overview

4.2.1 Xplained Pro Standard Extension Headers

The ATtiny817 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 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 ATtiny817 Pin Function Shared Functionality

1 [ID] - - Communication line to the ID chip on an extension

board

2 [GND] - - Ground

3 [ADC(+)] PA6 AIN6 QTouch Button 1

4 [ADC(-)] PA7 AIN7 QTouch Button 2

5 [GPIO1] PB7 GPIO -

6 [GPIO2] PB4 GPIO LED0

7 [PWM(+)] PB0 TC/W0 -

8 [PWM(-)] PB1 TC/W1 -

9 [IRQ/GPIO] PA5 IRQ/GPIO -

10 [SPI_SS_B/GPIO] PA4 GPIO -

11 [I²C_SDA] PA1 I²C SDA EXT3 and EDBG I²C

12 [I²C_SCL] PA2 I²C SCL EXT3 and EDBG I²C

ATtiny817 Xplained Pro

EXT1 Pin ATtiny817 Pin Function Shared Functionality

13 [USART_RX] PB3 UART RX EXT3, EDBG CDC, and Crystal (1)

14 [USART_TX] PB2 UART TX EXT3, EDBG CDC, and Crystal (1)

15 [SPI_SS_A] PC3 SPI SS -

16 [SPI_MOSI] PC2 SPI MOSI EXT3 and EDBG SPI

17 [SPI_MISO] PC1 SPI MISO EXT3 and EDBG SPI

18 [SPI_SCK] PC0 SPI SCK EXT3 and EDBG SPI

19 [GND] - - Ground

20 [VCC] - - Power for extension board

1) Not connected by default, see Connecting the 32 kHz Crystal for more information.

Note: Signal functions in italic use alternative pin location. These have to be configured in the

PORTMUX register of the device.

Table 4-2. Extension Header EXT3

EXT3 Pin ATtiny817 Pin Function Shared Functionality

1 [ID] - - Communication line to the ID chip on an

extension board

2 [GND] - - Ground

3 [ADC(+)] - -

4 [ADC(-)] - -

5 [GPIO1] PC5 GPIO SW1 and UPDI debug connector

6 [GPIO2] - -

7 [PWM(+)] - -

8 [PWM(-)] - -

9 [IRQ/GPIO] PB6 IRQ/GPIO EDBG DGI

10 [SPI_SS_B/GPIO] PB5 GPIO SW0 and EDBG DGI

11 [I²C_SDA] PA1 I²C SDA EXT1 and EDBG I²C

12 [I²C_SCL] PA2 I²C SCL EXT1 and EDBG I²C

13 [USART_RX] PB3 UART RX EXT1, EDBG CDC, and Crystal (1)

14 [USART_TX] PB2 UART TX EXT1, EDBG CDC, and Crystal (1)

15 [SPI_SS_A] PA3 GPIO / SPI_SS -

16 [SPI_MOSI] PC2 SPI MOSI EXT1 and EDBG SPI

17 [SPI_MISO] PC1 SPI MISO EXT1 and EDBG SPI

18 [SPI_SCK] PC0 SPI SCK EXT1 and EDBG SPI

ATtiny817 Xplained Pro

EXT3 Pin ATtiny817 Pin Function Shared Functionality

19 [GND] - - Ground

20 [VCC] - - Power for extension board

1) Not connected by default, see Connecting the 32 kHz Crystal for more information.

Note: Signal functions in italic use alternative pin location. These have to be configured in the

PORTMUX register of the device.

4.2.2 UPDI Debug Connector

ATtiny817 Xplained Pro has a 10-pin 50-mil UPDI Debug Connector that can be used to attach external

debuggers to the ATtiny817.

Table 4-3. UPDI Debug Connector

UPDI Debug

Connector Pin

Pin/Net Function Shared Functionality

1 - -

2 GND Ground

3 PA0 UPDI/RESET EDBG

4 VCC_TARGET_P3V3 ATtiny817 voltage

5 - -

6 PC5 - SW1 and EXT3

7 - -

8 - -

9 - -

10 - -

Note:

1. PA0 is by default configured as UPDI. PA0 can be fused to be RESET or GPIO, but this is

prevented by the EDBG as this will disable all further programming and debugging by the EDBG.

2. Even though PC5 is connected to the UPDI debug connector this pin is not used for programming

or debugging.

4.3 Peripherals

4.3.1 Mechanical Buttons

ATtiny817 Xplained Pro contains two generic user configurable mechanical buttons. When a button is

pressed it will drive the I/O line to GND.

ATtiny817 Xplained Pro

Info: There is no pull-up resistor connected to the generic user button SW0. Remember to

enable the internal pull-up in the ATtiny817 to use the button. There is an on-board pull-up

resistor connected to the generic user button SW1. There is no need to enable the internal pull-

up in the ATtiny817 to use the button.

Table 4-4. Mechanical Buttons

ATtiny817 Pin Silkscreen Text Shared Functionality

PB5 SW0 EXT3 and EDBG DGI

PC5 SW1 / RST EXT3 and UPDI debug connector

Info: PC5 is connected to a button that states "SW1/RST" because PC5 had reset capabilities

in an early version of the ATtiny817. Today the ATtiny817 does not have any reset capabilities

on PC5.

4.3.2 Crystal

The ATtiny817 Xplained Pro kit contains a 32.768 kHz crystal, which can be used as clock source for the

ATtiny817 device. The crystal has a cut-strap next to it, which 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 the AVR4100 application note from

Microchip.

The 32.768 kHz crystal on the ATtiny817 Xplained Pro is a Kyocera Crystal Device Corporation

ST3215SB32768E0HPWBB. The crystal has been formally tested and matched to the ATtiny817 by

Kyocera. The test report is available in the design documentation located at the ATtiny817 Xplained Pro

website.

Info: The crystal is not connected to the device by default as the crystal pins on the device are

shared with the UART module. If the crystal is needed by the application, the UART interface is

lost. See Kit Modifications for instructions on how to modify the kit for crystal operation.

Info: The Kyocera Crystal Device Corporation crystals that are matched with Microchip

products can be found on their website: http://prdct-search.kyocera.co.jp/crystal-ic/?

p=en_search/

Table 4-5. External 32.768 kHz Crystal

ATtiny817 Pin Function

PB2 XOUT32

PB3 XIN32

Related Links

ATtiny817 Xplained Pro

Xplained Pro Power Header

UPDI Debug Connector

Connectors

ATtiny817 Xplained Pro

5. Appendix

5.1 Getting Started with IAR

IAR Embedded Workbench® for AVR® is a proprietary high-efficiency compiler which is not based on

GCC. Programming and debugging of Xplained Pro kits are supported in IAR™ Embedded Workbench for

AVR using the Atmel-ICE interface. Some initial settings must 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.

2. In the category General Options, select the Target tab. Select the device for the project, or, if not

listed, the core of the device.

3. In the category Debugger, select the Setup tab. Select Atmel-ICE as the driver.

4. In the category Debugger > Atmel-ICE, select the Atmel-ICE 1 tab. Select UPDI as the interface

and optionally select the UPDI frequency.

Info: If the selection of Debug Port, mentioned in step 4, is grayed out, the interface is pre-

selected and the user can skip this configuration step.

Figure 5-1. Select Target Device

ATtiny817 Xplained Pro

Figure 5-2. Select Debugger

Figure 5-3. Configure Interface

ATtiny817 Xplained Pro

6. Hardware Revision History and Known Issues

This user guide provides the latest available revision of the kit. This chapter contains information about

known issues, a revision history of older revisions, and how older revisions differ from the latest revision.

6.1 Identifying Product ID and Revision

The revision and product identifier of the 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.

When an Xplained Pro MCU board is connected to a computer with Atmel Studio running, an information

window with the serial number is shown. The first six digits of the serial number contain the product

identifier and revision. Information about connected Xplained Pro extension boards is also shown in the

window.

The same information can be found on the sticker on the bottom side of the PCB. Most kits have stickers

that have the identifier and revision printed 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 data matrix code, which contains a

serial number string.

The serial number string has the following format:

"nnnnrrssssssssss"

n = product identifier

r = revision

s = serial number

The product identifier for the ATtiny817 Xplained Pro is A09-2654.

6.2 Revision 6

Revision 6 is identical to revision 4 and revision 5 with improved test coverage.

6.3 Revision 5

Revision 5 is identical to revision 4 with improved test coverage.

6.4 Revision 4

Revision 4 is the initially released revision.

ATtiny817 Xplained Pro

7. Document Revision History

Doc. rev. Date Comment

A 10/2017 Converted to Microchip format and replaced the Atmel document number

42745A.

Added links to QTouch example application in QTouch Button.

42745A 11/2016 Initial document release.

ATtiny817 Xplained Pro

The Microchip Web Site

Microchip provides online support via our web site at http://www.microchip.com/. This web site is used as

a means to make files and information easily available to customers. Accessible by using your favorite

Internet browser, the web site contains the following information:

•Product Support – Data sheets and errata, application notes and sample programs, design

resources, user’s guides and hardware support documents, latest software releases and archived

software

•General Technical Support – Frequently Asked Questions (FAQ), technical support requests,

online discussion groups, Microchip consultant program member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip press releases,

listing of seminars and events, listings of Microchip sales offices, distributors and factory

representatives

Customer Change Notification Service

Microchip’s customer notification service helps keep customers current on Microchip products.

Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata

related to a specified product family or development tool of interest.

To register, access the Microchip web site at http://www.microchip.com/. Under “Support”, click on

“Customer Change Notification” and follow the registration instructions.

Customer Support

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or Field Application Engineer (FAE) for support.

Local sales offices are also available to help customers. A listing of sales offices and locations is included

in the back of this document.

Technical support is available through the web site at: http://www.microchip.com/support

Microchip Devices Code Protection Feature

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the

market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of

these methods, to our knowledge, require using the Microchip products in a manner outside the

operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is

engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

ATtiny817 Xplained Pro

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their

code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the

code protection features of our products. Attempts to break Microchip’s code protection feature may be a

violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software

or other copyrighted work, you may have a right to sue for relief under that Act.

Legal Notice

Information contained in this publication regarding device applications and the like is provided only for

your convenience and may be superseded by updates. It is your responsibility to ensure that your

application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY

OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS

CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE.

Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life

support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend,

indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting

from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual

property rights unless otherwise stated.

Trademarks

The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BeaconThings,

BitCloud, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq, KeeLoq logo,

Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB,

OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, RightTouch, SAM-BA,

SpyNIC, SST, SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of

Microchip Technology Incorporated in the U.S.A. and other countries.

ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight

Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom,

chipKIT, chipKIT logo, CodeGuard, CryptoAuthentication, CryptoCompanion, CryptoController,

dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial

Programming, ICSP, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, Mindi, MiWi,

motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient

Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PureSilicon, QMatrix, RightTouch logo, REAL

ICE, Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total

Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are

trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of

Microchip Technology Inc., in other countries.

All other trademarks mentioned herein are property of their respective companies.

ATtiny817 Xplained Pro

ISBN: 978-1-5224-2199-3

Quality Management System Certified by DNV

ISO/TS 16949

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer

fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California

and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC®

DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design and manufacture of development

systems is ISO 9001:2000 certified.

ATtiny817 Xplained Pro

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