Atmel maXTouch Xplained Pro User Manual

8051 Architecture
maXTouch Xplained Pro
USER GUIDE

Preface

Atmel® maXTouch® Xplained Pro is an extension board to the Atmel Xplained Pro evaluation platform. The board enables the user to experiment with user interface applications with maXTouch and LCD.
Atmel-42350B-maXTouch-Xplained-Pro_User Guide-01/2016

Table of Contents

Preface............................................................................................................................ 1
1. Introduction................................................................................................................3
1.1. Features....................................................................................................................................... 3
1.2. Kit Overview................................................................................................................................. 3
2. Getting Started...........................................................................................................5
2.1. Xplained Pro Quick Start.............................................................................................................. 5
2.2. Connecting maXTouch Xplained Pro to the Xplained Pro MCU Board........................................ 5
2.3. Design Documentation and Relevant Links................................................................................. 5
3. Xplained Pro.............................................................................................................. 7
3.1. Hardware Identification System....................................................................................................7
3.2. Xplained Pro Headers and Connectors........................................................................................7
3.2.1. Xplained Pro Standard Extension Header..................................................................... 7
3.2.2. Xplained Pro LCD Extension Connector........................................................................8
4. Hardware User Guide.............................................................................................. 11
4.1. Electrical Characteristics............................................................................................................ 11
4.2. Headers and Connectors............................................................................................................11
4.2.1. maXTouch Xplained Pro Extension Headers............................................................... 11
4.3. Peripherals................................................................................................................................. 14
4.3.1. maXTouch Capacitive Touch Controller.......................................................................14
4.3.2. Interface Selector.........................................................................................................14
4.4. Mounting.....................................................................................................................................14
4.4.1. Board Stacking Options............................................................................................... 14
5. Hardware Revision History and Known Issues........................................................18
5.1. Identifying Product ID and Revision........................................................................................... 18
5.2. Revision 2...................................................................................................................................18
6. Document Revision History..................................................................................... 19
7. Evaluation Board/kit Important Notice..................................................................... 20
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1. Introduction

1.1. Features

4.3" Display module
ILI9488 LCD Driver
320x480 Resolution
Parallel interface (up to 18-bit)
Parallel RGB interface
3- and 4-wire SPI interface
maXTouch capacitive touch screen controller
Xplained Pro hardware identification system
Kit Contents
One 4.3" display module
One 50-way Flexible Flat Cable (FFC)
One 20-way Ribbon Cable
Four mounting screws and eight threaded spacers

1.2. Kit Overview

Atmel maXTouch Xplained Pro is an extension board for the Xplained Pro platform with a 320x480 RGB LCD and a capacitive touch sensor with a maXTouch controller. The LCD can be controlled via different interfaces, including 3- and 4-wire SPI, Parallel and RGB Parallel interface mode using the DIP-switch to select the interface. The maXTouch Xplained Pro kit connects to any Xplained Pro standard extension header on any Xplained Pro MCU board using the 20-pin header, but is limited to 3- and 4-wire SPI mode. maXTouch Xplained Pro also features a standard Xplained Pro LCD connector (FFC), which enables use of the parallel interfaces. Both connections features SPI interface for the LCD and I2C for the maXTouch device.
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Figure 1-1. maXTouch Xplained Pro Extension Board
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2. Getting Started

2.1. Xplained Pro Quick Start

Steps to start exploring the Atmel Xplained Pro platform:
1. Download Atmel Studio.
2. Launch Atmel Studio.
3. Connect maXTouch 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. Connecting maXTouch Xplained Pro to the Xplained Pro MCU Board

Atmel maXTouch Xplained Pro has been designed to be connected to the Xplained Pro header marked EXT3. However, it is compatible with all Xplained Pro EXT headers. Refer to the pin-out of your Xplained Pro evaluation kit to find out which Xplained Pro EXT headers that can be used. The Flexible Flat Cable (FFC) connector can be used if parallel interface from the MCU to the display is used on kits featuring the Xplained Pro LCD connector. (Only one cables should be connected at the same time.)
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) that is connected. Atmel Studio will present relevant information like datasheets and kit documentation. The kit landing page in Atmel Studio also have 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. No external programmer or debugger tool is needed.
®

2.3. Design Documentation and Relevant Links

The following list contains links to the most relevant documents and software for maXTouch 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.
EDBG User Guide - User guide containing more information about the on-board Embedded
Debugger.
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.
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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.
maXTouch Xplained Pro on the Atmel website - Atmel website link.
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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. The table below 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 the table below.
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.
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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/
Slave select for SPI and/or general purpose I/O
GPIO
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

3.2.2. Xplained Pro LCD Extension Connector

The LCD connector provides the ability to connect to display extensions that have a parallel interface. The connector implements signals for a MCU parallel bus interface and a LCD controller interface as well as signals for a touch controller. The connector pin-out definition is shown in Table 3-3 Xplained Pro LCD
Connector on page 9. Note that usually only one display interface is implemented, either the LCD
controller or the MCU bus interface.
A FPC/FFC connector with 50 pins and 0.5mm pitch is used for the LCD connector. The connector XF2M-5015-1A from Omron is used on several Xplained Pro designs and can be used as a reference.
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Table 3-3. Xplained Pro LCD Connector
Pin number Name RGB interface description MCU interface description
1 ID Communication line to the ID chip on an extension board
2 GND Ground
3 D0 Data line
4 D1 Data line
5 D2 Data line
6 D3 Data line
7 GND Ground
8 D4 Data line
9 D5 Data line
10 D6 Data line
11 D7 Data line
12 GND Ground
13 D8 Data line
14 D9 Data line
15 D10 Data line
16 D11 Data line
17 GND Ground
18 D12 Data line
19 D13 Data line
20 D14 Data line
21 D15 Data line
22 GND Ground
23 D16 Data line
24 D17 Data line
25 D18 Data line
26 D19 Data line
27 GND Ground
28 D20 Data line
29 D21 Data line
30 D22 Data line
31 D23 Data line
32 GND Ground
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Pin number Name RGB interface description MCU interface description
33 PCLK / CMD DATA
SEL
Pixel clock Display RAM select. One
address line of the MCU for displays where it is possible to select either register or data interface.
34 VSYNC / CS Vertical Synchronization Chip select
35 HSYNC / WE Horizontal Synchronization Write enable signal
36 DATA ENABLE /
Data enable signal Read enable signal
RE
37 SPI SCK Clock for serial peripheral interface
38 SPI MOSI Master out slave in of serial peripheral interface
39 SPI MISO Master in slave out of serial peripheral interface
40 SPI SS Slave select for serial peripheral interface. Preferably a dedicated
pin.
41 ENABLE Display enable
42 I2C SDA I2C data
43 I2C SCL I2C clock
44 IRQ1 Interrupt 1
45 IRQ2 Interrupt 2
46 PWM Backlight control
47 RESET Extension reset
48 VCC 3.3V power supply for extension board
49 VCC 3.3V power supply for extension board
50 GND Ground
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4. Hardware User Guide

4.1. Electrical Characteristics

maXTouch 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. maXTouch Xplained Pro ID Chip Content
Data field Content
Product name maXTouch Xplained Pro
Minimum operation voltage 3.0V
Maximum operation voltage 3.3V
Maximum current 50mA
Related Links
Hardware Identification System on page 7

4.2. Headers and Connectors

4.2.1. maXTouch Xplained Pro Extension Headers

maXTouch Xplained Pro implements one Table 3-2 Xplained Pro Standard Extension Header on page 8 marked with XPRO EXTENSION HEADER in silkscreen. This header makes it possible to connect the board to any Xplained Pro MCU board using a 20-pin ribbon cable (included in kit). maXTouch Xplained Pro also implements one Table 3-3 Xplained Pro LCD Connector on page 9 marked with XPRO LCD CONNECTOR in silkscreen. The pin-out definition for the extension header can be seen in Table 4-2 
maXTouch Xplained Pro Standard Extension Header on page 11 and the pin-out for the LCD connector
in Table 4-3 maXTouch Xplained Pro Xplained Pro LCD Connector on page 12.
Table 4-2. maXTouch Xplained Pro Standard Extension Header
Pin on EXT Function Description
1 ID Communication line to ID chip
2 GND Ground
3 Not Connected
4 Not Connected
5 GPIO Command/Data Select
6 Not Connected
7 PWM Backlight control
8 Not Connected
9 GPIO/IRQ IRQ from maXTouch controller
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Pin on EXT Function Description
10 GPIO RESET signal for maXTouch and LCD controller
11 I2C SDA I2C Data line for maXTouch controller
12 I2C SCL I2C Clock line for maXTouch controller
13 Not Connected
14 Not Connected
15 CS CS line for LCD controller
16 SPI MOSI SPI Data to LCD controller
17 SPI MISO SPI Data from LCD controller
18 SPI SCK SPI Clock line
19 GND Ground
20 VCC Target supply voltage
Table 4-3. maXTouch Xplained Pro Xplained Pro LCD Connector
Pin number Name RGB interface description MCU interface description
1 ID Communication line to ID chip on extension board
2 GND Ground
3 D0 Data line
4 D1 Data line
5 D2 Data line
6 D3 Data line
7 GND Ground
8 D4 Data line
9 D5 Data line
10 D6 Data line
11 D7 Data line
12 GND Ground
13 D8 Data line
14 D9 Data line
15 D10 Data line
16 D11 Data line
17 GND Ground
18 D12 Data line
19 D12 Data line
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Pin number Name RGB interface description MCU interface description
20 D14 Data line
21 D15 Data line
22 GND Ground
23 D16 Data line
24 D17 Data line
25 Not Connected
26 Not Connected
27 GND Ground
28 Not Connected
29 Not Connected
30 Not Connected
31 Not Connected
32 GND Ground
33 PCLK / CMD_DATA_SEL Pixel clock Display RAM select. One address
line of the MCU for displays where it is possible to select either the register or the data interface
34 VSYNC / CS Vertical synchronization Chip select
35 HSYNC / WE Horizontal synchronization Write enable signal
36 DATA ENABLE / RE Data enable signal Read enable signal
37 SPI SCK Clock for Serial peripheral interface
38 SPI MOSI Master out slave in line of Serial peripheral interface
39 SPI MISO Master in slave out line of Serial peripheral interface
40 SPI SS Slave select for SPI. Should be unique if possible
41 Not Connected
42 TWI SDA I2C data line (maXTouch)
43 TWI SCL I2C clock line (maXTouch)
44 IRQ1 maXTouch interrupt line
45 Not Connected
46 PWM Backlight control
47 RESET Reset for both display and maxTouch
48 VCC 3.3V power supply for extension board
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Pin number Name RGB interface description MCU interface description
49 VCC 3.3V power supply for extension board
50 GND Ground

4.3. Peripherals

4.3.1. maXTouch Capacitive Touch Controller

maXTouch Xplained Pro has a ATMXT112S capacitive touch controller that's accessible over I2C. See code examples in ASF for how to set up and use the touch controller.

4.3.2. Interface Selector

maXTouch Xplained Pro features a 3-way DIP-switch that is used for configuring the display interface mode. Setting the switch positions to ON, will result in a high level (1) for the IMx line. See the table below for interface mode settings.
Table 4-4. maXTouch Xplained Pro DIP-Switch Settings
IM2 IM1 IM0 Interface Pins in use
0 0 0 18-bit parallel bus DB[17:0], CS, D/C, WE, RE
0 0 1 9-bit parallel bus DB[8:0], CS, D/C, WE, RE
0 1 0 16-bit parallel bus DB[15:0], CS, D/C, WE, RE
0 1 1 8-bit parallel bus DB[7:0], CS, D/C, WE, RE
1 0 1 18-bit RGB parallel mode
1 0 1 3-wire/9-bit SPI mode
1 1 1 4-wire/8-bit SPI mode MOSI, MISO, SCLK, CS, D/C
Note: 
1. The setting for RGB parallel mode and 3-wire SPI is the same. To be able to use the RGB mode, the internal configuration registers needs to be set correctly using 3-wire SPI.

4.4. Mounting

The kit includes accessories for mounitng the display module to a MCU board.
Mounting accessories:
Four M2.5 x 5 mm screws
Four M2.5 x 20 mm hex spacers (male to female)
Four M2.5 x 10 mm hex spacers (female to female)

4.4.1. Board Stacking Options

maXTouch Xplained Pro display module is intended to be mountable on top, on the bottom, or placed sideways to an Xplained Pro MCU board as shown in the following illustrations.
(1)
(1)
DB[17:0], HSYNC, VSYNC, PCLK, DE, MOSI, MISO, SCLK, CS
MOSI, MISO, SCLK, CS
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Figure 4-1. Side by Side Connection Option
Figure 4-2. Top Side Mounting
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Figure 4-3. Bottom Side Mounting
The stacking is supported by spacers and screws. Figure 4-4 Display Module Top-stacked on page 16 shows an display module stacked on top of a MCU board. Figure 4-5 Display Module Bottom-stacked on page 17 shows an LCD board stacked on the bottom side of a MCU board, note that the MCU board has been flipped upside down in this drawing. Both of these mounting configurations requires four long spacers (M2.5 x 20mm, female/male), four short spacers (M2.5 x 10mm, female/female), and four screws (M2.5 x 5mm).
Figure 4-4. Display Module Top-stacked
Screw
LCD Board
Spacer
MCU Board
Spacer
Display
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Figure 4-5. Display Module Bottom-stacked
Screw
LCD Board
Spacer
MCU Board
Spacer
Display
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5. Hardware Revision History and Known Issues

5.1. Identifying Product ID and Revision

The revision and product identifier of Xplained Pro boards can be found in two ways; either through Atmel Studio or by looking at the sticker on the bottom side of the PCB.
By connecting an Xplained Pro MCU board to a computer with Atmel Studio running, an information window will pop up. The first six digits of the serial number, which is listed under kit details, contain the product identifier and revision. Information about connected Xplained Pro extension boards will also appear in the Atmel Kit's window.
The same information can be found on the sticker on the bottom side of the PCB. Most kits will print the identifier and revision in plain text as A09-nnnn\rr, where nnnn is the identifier and rr is the revision. Boards with limited space have a sticker with only a QR-code, which contains a serial number string.
The serial number string has the following format:
"nnnnrrssssssssss"
n = product identifier
r = revision
s = serial number
The product identifier for maXTouch Xplained Pro is A09-2171.

5.2. Revision 2

Revision 2 of maXTouch Xplained Pro (2171) is the initial released version.
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6. Document Revision History

Doc. rev. Date Comment
42350B 01/2016 Added Electrical Characteristics on page 11.
42350A 11/2014 Initial document release.
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7. Evaluation Board/kit Important Notice

This evaluation board/kit is intended for use for FURTHER ENGINEERING, DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY. It is not a finished product and may not
(yet) comply with some or any technical or legal requirements that are applicable to finished products, including, without limitation, directives regarding electromagnetic compatibility, recycling (WEEE), FCC, CE or UL (except as may be otherwise noted on the board/kit). Atmel supplied this board/kit "AS IS," without any warranties, with all faults, at the buyer's and further users' sole risk. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies Atmel from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge and any other technical or legal concerns.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER USER NOR ATMEL SHALL BE LIABLE TO EACH OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
No license is granted under any patent right or other intellectual property right of Atmel covering or relating to any machine, process, or combination in which such Atmel products or services might be or are used.
Mailing Address:
Atmel Corporation 1600 Technology Drive San Jose, CA 95110 USA
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Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 | www.atmel.com
©
2016 Atmel Corporation. / Rev.: Atmel-42350B-maXTouch-Xplained-Pro_User Guide-01/2016
Atmel®, Atmel logo and combinations thereof, Enabling Unlimited Possibilities®, maXTouch®, and others are registered trademarks or trademarks of Atmel Corporation in U.S. and other countries. Windows® is a registered trademark of Microsoft Corporation in U.S. and or other countries. Other terms and product names may be trademarks of others.
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