Microchip Technology ATmega4809 Xplained Pro Manual de usuario

ATmega4809 Xplained Pro

Preface

The ATmega4809 Xplained Pro evaluation kit is a hardware platform to evaluate the ATmega4809

microcontroller.

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

features of the ATmega4809 and explains how to integrate the device into 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 ATmega4809.

The Xplained Pro extension kits offer 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.............................................................................................................. 7

3.1. Embedded Debugger................................................................................................................... 7

3.2. Hardware Identification System....................................................................................................8

3.3. Power Sources............................................................................................................................. 8

3.4. Xplained Pro Headers and Connectors........................................................................................9

4. Hardware User Guide.............................................................................................. 11

4.1. Power Distribution...................................................................................................................... 12

4.2. Connectors.................................................................................................................................13

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

4.4. Embedded Debugger Implementation........................................................................................18

4.5. Kit Modifications......................................................................................................................... 20

5. Appendix..................................................................................................................24

5.1. Getting Started with IAR.............................................................................................................24

6. Hardware Revision History...................................................................................... 26

6.1. Identifying Product ID and Revision........................................................................................... 26

6.2. Revision 5...................................................................................................................................26

6.3. Revision 4...................................................................................................................................26

6.4. Revision 3...................................................................................................................................27

7. Document Revision History..................................................................................... 28

The Microchip Web Site................................................................................................ 29

Customer Change Notification Service..........................................................................29

Customer Support......................................................................................................... 29

Microchip Devices Code Protection Feature................................................................. 29

Legal Notice...................................................................................................................30

Trademarks................................................................................................................... 30

ATmega4809 Xplained Pro

Quality Management System Certified by DNV.............................................................31

Worldwide Sales and Service........................................................................................32

ATmega4809 Xplained Pro

1. Introduction

1.1 Features

• ATmega4809 microcontroller

• Selectable target voltage

– 3.3V

– 5.0V (USB/external power)

• One mechanical reset/user programmable button

• One mechanical user programmable button

• One yellow user programmable LED

• ATECC508 CryptoAuthentication™ device

• 32.768 kHz crystal

• Three Xplained Pro extension headers

• One mikroBUS™ socket

• 10-pin, 50-mil AVR® Debug Connector with UPDI

• 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, four GPIOs

– Virtual COM port (CDC)

• USB powered

1.2 Kit Overview

The ATmega4809 Xplained Pro evaluation kit is a hardware platform to evaluate the ATmega4809.

The kit offers a set of features that enables the ATmega4809 user to get started with the ATmega4809

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

ATmega4809 Xplained Pro

Introduction

Figure 1-1. ATmega4809 Xplained Pro Evaluation Kit Overview

DEBUG USB

POWER HEADER

EXTENSION 1 HEADER

EXTENSION 2 HEADER

EXTENSION 3 HEADER

ATmega4809

RESET BUTTON

CURRENT MEASUREMENT

HEADER

SW0 USER BUTTON

USER LED0

mikroBUS™ socket

AVR DEBUG

FOR EXTERNAL

DEBUGGER

ATECC508A

CRYPTO DEVICE

32.768kHz Crystal

TARGET VOLTAGE

SELECT HEADER

ATmega4809 Xplained Pro

Introduction

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 ATmega4809 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 ATmega4809

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.

•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.

•http://microchip.com/start - 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.

•ATmega4809 Xplained Pro website - Kit information, latest user guide and design documentation.

•ATmega4809 Xplained Pro on Microchip Direct - Purchase this kit on Microchip Direct.

ATmega4809 Xplained Pro

Getting Started

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 ATmega4809 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 ATmega4809 with the help of Atmel Studio. The UPDI interface is

connected between the EDBG and the ATmega4809 on the ATmega4809 Xplained Pro.

The Virtual COM Port is connected to a UART on the ATmega4809 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 ATmega4809 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 ATmega4809. 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

ATmega4809. 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 ATmega4809 Xplained Pro, a power LED and a status LED. The

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

ATmega4809 Xplained Pro

Xplained Pro

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 additional information on the EDBG, see the EDBG User Guide.

3.2 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.

Table 3-2. 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

3.3 Power Sources

The ATmega4809 Xplained Pro kit can be powered by several power sources, as listed in the following

table.

Table 3-3. Power Sources for ATmega4809 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

The recommended

value for maximum

current is 2A.

PWR

ATmega4809 Xplained Pro

Xplained Pro

Power Source Voltage Requirements Current Requirements Connector Marking

host operation is not

required.

Embedded debugger

USB

4.4V to 5.25V (according

to USB specification)

500 mA (according to

USB specification)

DEBUG USB

The kit automatically detects the available power sources and chooses which 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.

3.4 Xplained Pro Headers and Connectors

3.4.1 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. The

following table provides the pin description of all the connected pins.

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 3-4. 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.

ATmega4809 Xplained Pro

Xplained Pro

Pin Number Pin Name Description

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.

3.4.2 Xplained Pro Power Header

The power header can be used to connect external power to the ATmega4809 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 3-5. 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)

ATmega4809 Xplained Pro

Xplained Pro

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