Atmel I/O1 Xplained Pro Manuel utilisateur

Atmel MCUs

I/O1 Xplained Pro

USER GUIDE

Preface

Atmel® I/O1 Xplained Pro is an extension board to the Atmel Xplained Pro

evaluation platform. I/O1 Xplained Pro is designed to give a wide variety of

functionality to Xplained Pro MCU boards including a microSD card, a

temperature sensor, a light sensor, and more.

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

Table of Contents

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

1. Introduction................................................................................................................3

1.1. Features....................................................................................................................................... 3

1.2. Kit Overview................................................................................................................................. 3

2. Getting Started...........................................................................................................4

2.1. Xplained Pro Quick Start.............................................................................................................. 4

2.2. Design Documentation and Relevant Links................................................................................. 4

3. Xplained Pro.............................................................................................................. 5

3.1. Hardware Identification System....................................................................................................5

3.2. Xplained Pro Headers and Connectors........................................................................................5

3.2.1. Xplained Pro Standard Extension Header..................................................................... 5

4. Hardware User Guide................................................................................................7

4.1. Electrical Characteristics.............................................................................................................. 7

4.2. Headers and Connectors..............................................................................................................7

4.2.1. I/O1 Xplained Pro Extension Header.............................................................................7

4.2.2. Power Header................................................................................................................8

4.2.3. GPIO Header................................................................................................................. 8

4.2.4. UART Header................................................................................................................ 9

4.3. Peripherals................................................................................................................................... 9

4.3.1. LED................................................................................................................................9

4.3.2. Low Pass Filter.............................................................................................................. 9

4.3.3. Temperature Sensor...................................................................................................... 9

4.3.4. microSD Card Connector.............................................................................................10

4.3.5. Light Sensor.................................................................................................................11

5. Hardware Revision History and Known Issues........................................................12

5.1. Identifying Product ID and Revision........................................................................................... 12

5.2. Revision 3...................................................................................................................................12

6. Document Revision History..................................................................................... 13

7. Evaluation Board/kit Important Notice..................................................................... 14

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

1. Introduction

1.1. Features

•microSD card connector

–2GB microSD card included

–Accessed with SPI interface

•PWM

–LED control

–PWM → Low pass filter → ADC

•ADC

–PWM → Low pass filter → ADC

–Light sensor

•UART

–Loopback interface via pin header

•TWI

–AT30TSE758 temperature sensor with EEPROM

•Xplained Pro hardware identification system

1.2. Kit Overview

Atmel I/O1 Xplained Pro extension board is a generic extension board for the Xplained Pro platform. It

connects to any Xplained Pro standard extension header on any Xplained Pro MCU board.

The extension board utilizes all functions on the standard Xplained Pro extension header to further

enhance the feature set of Xplained Pro MCU boards.

Figure 1-1 I/O1 Xplained Pro Extension Board

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

2. Getting Started

2.1. Xplained Pro Quick Start

Three steps to start exploring the Atmel Xplained Pro platform:

1. Download Atmel Studio.

2. Launch Atmel Studio.

3. Connect I/O1 Xplained Pro to an Xplained Pro MCU board and connect a USB cable to the DEBUG

USB port on the Xplained Pro MCU board.

When the Xplained Pro MCU kit 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 target 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 I/O1 Xplained Pro:

•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 different MCU families.

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

microcontrollers.

•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.

•I/O1 Xplained Pro on Atmel web page - Atmel website link.

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

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 integrated

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. 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 read 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 3-1 Xplained Pro ID Chip Content on page 5

shows the data fields stored in the ID chip with example content.

Table 3-1 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

3.2. Xplained Pro Headers and Connectors

3.2.1. 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 3-2

Xplained Pro Standard Extension Header on page 6.

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.

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

Table 3-2 Xplained Pro Standard Extension Header

Pin number Name Description

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 I/O

6 GPIO2 General 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/

GPIO

Slave select for SPI and/or general purpose I/O

11 I2C_SDA Data line for I2C interface. Always implemented, bus type.

12 I2C_SCL Clock line for I2C interface. Always implemented, bus type.

13 UART_RX Receiver line of target device UART

14 UART_TX Transmitter line of target device UART

15 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

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

4. Hardware User Guide

4.1. Electrical Characteristics

I/O1 Xplained Pro can be connected to several Xplained Pro MCU boards and manually connected to

other hardware. Xplained Pro MCU board(s) that does not have 3.3V as it's primary target voltage will

read all ID devices on connected extensions to check if they support the target voltage before enabling it

to the extension headers. The table below shows the static content written in the ID chip.

Table 4-1 I/O1 Xplained Pro ID Chip Content

Data field Content

Product name I/O1 Xplained Pro

Minimum operation voltage 2.0V

Maximum operation voltage 3.6V

Maximum current 10mA

Related Links

Hardware Identification System on page 5

4.2. Headers and Connectors

4.2.1. I/O1 Xplained Pro Extension Header

I/O1 Xplained Pro implements one standard Xplained Pro extension header marked with EXT in

silkscreen. This header makes it possible to connect the board to any Xplained Pro MCU board. The pin-

out definition for the extension header can be seen in the table below.

Table 4-2 I/O1 Xplained Pro Extension Header

EXT

Function Description

1 ID Communication line to ID chip

2 GND Ground

3 LIGHTSENSOR Light sensor output (ADC)

4 LP_OUT Low pass filter output (ADC)

5 GPIO1 General Purpose I/O pin (GPIO)

6 GPIO2 General Purpose I/O pin (GPIO)

7 LED LED control (PWM)

8 LP_IN Low pass filter input (PWM)

9 TEMP_ALERT ALERT pin (Pin 3) of temperature sensor chip (IRQ)

10 microSD_DETECT Detect pin on microSD card connector (GPIO)

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

EXT

Function Description

11 TWI SDA Data line of TWI interface, connected to SDA pin (Pin 1) of temperature

sensor chip

12 TWI SCL Clock line of TWI interface, connected to SCL pin (Pin 2) of temperature

sensor chip

13 UART RX Receive pin of target MCU UART interface

14 UART TX Transmit pin of target MCU UART interface

15 microSD_SS Chip select signal, connected to DAT3 pin on microSD card connector

16 SPI_MOSI Master Out, Slave In signal of target MCU SPI interface. Connected to

CMD pin on microSD card connector.

17 SPI_MISO Master In, Slave Out signal of target MCU SPI interface. Connected to D0

pin on microSD card connector.

18 SPI_SCK Clock line of SPI interface. Connected to CLK pin on microSD card

connector.

19 GND Ground

20 VCC Target supply voltage

4.2.2. Power Header

The two pin power header on IO1 Xplained Pro can be used together with the GPIO pins to connect

external circuitry or probe the voltage on the board. The pins of the header are marked in silk screen with

VTG for target voltage and GND for ground.

Info: The two pin power header should not be used to apply power to I/O1 Xplained Pro when

connected to an Xplained Pro MCU board as it will get power from the Xplained Pro MCU board

through the 20-pin extension connector.

Table 4-3 Power Header

Silk screen marking Description

VTG Target voltage, main voltage of the I/O1 Xplained Pro extension board

GND Ground

4.2.3. GPIO Header

I/O1 Xplained Pro features a 2-pin header with access to the two generic GPIO lines on the 20-pin

extension connector. These lines are routed from the 20-pin extension header through 39Ω series

resistors to the 2-pin GPIO header.

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

Table 4-4 GPIO Header

Pin on EXT connector Silk screen marking

5 GPIO1

6 GPIO2

4.2.4. UART Header

I/O1 Xplained Pro features a 2-pin header with access to the UART pins of the 20-pin extension

connector. This two pin header comes with a jumper mounted to enable the UART to work in loopback

mode. Both UART lines are terminated with 39Ω series resistors.

Table 4-5 UART Header

Pin on EXT connector Silk screen marking

14 TX

13 RX

4.3. Peripherals

4.3.1. LED

There is one yellow LED available on the I/O1 Xplained Pro extension board that can be controlled by

Pulse Width Modulation (PWM) or regular GPIO operation. The LED can be activated by driving the

connected I/O line to GND.

Table 4-6 LED Connection

Pin on EXT connector Silk screen marking

7 LED

4.3.2. Low Pass Filter

I/O1 Xplained Pro features a first order low-pass filter with a cutoff frequency of ~2340Hz. It is realized

with a 680Ω resistor and a 100nF capacitor. This filter can be used to filter a PWM generated signal which

can be sampled with an ADC pin.

Table 4-7 Low Pass Filter Connections

Pin on EXT connector Silk screen marking

8 PWM

4 ADC

4.3.3. Temperature Sensor

I/O1 Xplained Pro extension board features an Atmel AT30TSE758 temperature sensor chip with an 8kb

serial EEPROM inside. The sensor includes programmable high and low temperature alarms, user-

selectable temperature resolution up to 12 bits, and an I2C/SMBus™ compatible serial interface.

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

Table 4-8 Temperature Sensor Connections

Pin on EXT

connector

Pin name AT30TSE758

temperature

sensor pin

Comment

11 SDA 1 Data line of serial interface

12 SCL 2 Clock line of serial interface

9 ALERT 3 Temperature alarm signalling pin

GND GND 4

- A2 5 Address line for serial interface, by default pulled

high

- A1 6 Address line for serial interface, by default pulled

high

- A0 7 Address line for serial interface, by default pulled

high

VCC VCC 8

The temperature sensor has two TWI addresses; one for the temperature sensor and one for the

EEPROM. The addresses are "0b1001 A2 A1 A0" for the temperature sensor and "0b1010 A2 A1 A0" for

the EEPROM. The address selection lines (A2, A1, and A0) of the temperature sensor chip is by default

pulled high through 100kΩ resistors, which makes the default addresses 0b1001111 and 0b1010111.

Soldering the straps on the back of the I/O1 Xplained Pro board for An will alter that bit in the address to

zero. Each strap is marked in silkscreen with A0, A1, and A2 as shown in the picture below. When

communicating with the EEPROM parts of the TWI address is used as a page address. For more details,

see the device (AT30TSE752A/754A/758A) datasheet.

Figure 4-1 Temperature Sensor TWI Address

4.3.4. microSD Card Connector

I/O1 Xplained Pro features a microSD card connector that connects to cards via a SPI interface.

Examples on how to use microSD cards and an example SD card stack can be found through ASF, for

Atmel I/O1 Xplained Pro [USER GUIDE]

Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015

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