Atmel QTouch
QT2 Xplained Pro
USER GUIDE
Preface
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Atmel QT2 Xplained Pro kit is an extension board that enables the
evaluation of a mutual capacitance touch surface using the Peripheral Touch
Controller (PTC) module. The kit shows how easy it is to design a capacitive
touch surface solution for the PTC without the need for any external
components. The kit includes one board with a 4 by 4 touch surface and a 7
by 7 blue LED matrix for a visual feedback of the touch.
Atmel-42369B-QT2-Xplained-Pro_User Guide-03/2016
Table of Contents
Preface............................................................................................................................ 1
1. Introduction................................................................................................................ 3
1.1.
1.2.
1.3.
Features....................................................................................................................................... 3
Kit Overview................................................................................................................................. 3
Kit Compatibility............................................................................................................................3
2. Getting Started...........................................................................................................5
2.1.
2.2.
Xplained Pro Quick Start.............................................................................................................. 5
Design Documentation and Relevant Links................................................................................. 5
3. Xplained Pro.............................................................................................................. 6
3.1.
3.2.
Hardware Identification System....................................................................................................6
Xplained Pro Headers and Connectors........................................................................................6
3.2.1.
Xplained Pro Standard Extension Header..................................................................... 6
4. Hardware Users Guide.............................................................................................. 8
4.1.
4.2.
4.3.
Electrical Characteristics.............................................................................................................. 8
Headers and Connectors..............................................................................................................8
4.2.1.
Xplained Pro Standard Extension Headers................................................................... 8
Peripherals................................................................................................................................. 10
4.3.1.
LEDs............................................................................................................................ 10
4.3.2.
Touch Sensors............................................................................................................. 10
5. Hardware Revision History and Known Issues........................................................ 11
5.1.
5.2.
Identifying Product ID and Revision............................................................................................11
Revision 2................................................................................................................................... 11
6. Document Revision History..................................................................................... 12
7. Evaluation Board/Kit Important Notice.....................................................................13
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1.
Introduction
1.1.
Features
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1.2.
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QTouch
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4x4 Mutual Capacitance matrix
LEDs
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49 LED matrix
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IS31FL3728 LED matrix controller from ISSI
Xplained Pro hardware identification system
Kit Overview
Atmel QT2 Xplained Pro extension is designed specifically for Xplained Pro MCU boards featuring a MCU
with a built-in peripheral touch controller.
The extension board can be used to explore the touch functions on the PTC module in mutual
capacitance mode.
Figure 1-1. QT2 Xplained Pro Extension Board
1.3.
Kit Compatibility
This kit is only supported by Xplained Pro MCU boards that have a MCU with a built-in PTC and a
matching pin out that connects all sensors of the extension. There is no guarantee that every Xplained
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Pro MCU board with a device that has PTC will manage to match the touch signal pin out to the extension
headers.
Currently supported MCU boards are:
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•
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SAM D20 Xplained Pro
SAM D21 Xplained Pro
SAM D11 Xplained Pro
SAM C21 Xplained Pro
SAM L21 Xplained Pro
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SAM L22 Xplained Pro
SAM DA1 Xplained Pro
Other future Xplained MCU board designs may also support QT2 Xplained Pro.
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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 QT2 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
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Windows XP, Windows Vista , Windows 7, Windows 8, Windows 10, and Windows Server 2012.
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 QT2 Xplained Pro:
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•
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•
•
•
•
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Xplained products - Atmel Xplained evaluation kits are a series of easy-to-use evaluation kits for
Atmel microcontrollers and other Atmel products. For low pin-count devices the Xplained Nano
series provides a minimalistic solution with access to all I/O pins of the target microcontroller.
Xplained Mini kits are for medium pin-count devices and adds Arduino Uno compatible header
footprint and a prototyping area. Xplained Pro kits are for medium to high pin-count devices, they
features advanced debugging and standardized extensions for peripheral functions. All these kits
have on board programmers/debuggers which creates a set of low-cost boards for evaluation and
demonstration of features and capabilities of different Atmel products.
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Atmel QTouch Library PTC - QTouch Library for Atmel AVR and ARM -based microcontrollers.
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Atmel QTouch Composer - Tool for developing capacitive buttons, sliders, and wheels
applications.
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.
Hardware Users Guide in PDF format - PDF version of this User Guide.
Design Documentation - Package containing CAD source, schematics, BOM, assembly drawings,
3D plots, layer plots etc.
QT2 Xplained Pro on Atmel webpage - Atmel website link.
Integrated Silicon Solution Inc. - IS31FL3728 LED matrix controller manufacturer homepage.
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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/
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
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4.
Hardware Users Guide
4.1.
Electrical Characteristics
QT2 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 its 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. QT2 Xplained Pro ID Chip Content
Data field
Content
Product name
QT2 Xplained Pro
Minimum operation voltage
2.7V
Maximum operation voltage
5.5V
Maximum current
45mA
Related Links
Hardware Identification System on page 6
4.2.
Headers and Connectors
4.2.1.
Xplained Pro Standard Extension Headers
QT2 Xplained Pro implements two Xplained Pro Standard Extension Header marked with EXT1 and
EXT2 in silkscreen. These headers make it possible to connect the board to a Xplained Pro MCU board
with a MCU featuring a PTC module. The pin-out definition for the extension headers can be seen in
Table 4-2 QT2 Xplained Pro Extension Header 1 and Table 4-3 QT2 Xplained Pro Extension Header 2.
The X-sensors of the touch pad is available on both EXT1 and EXT2 header on the kit for supporting
Xplained Pro MCU kits with and without the EXT2 header.
Table 4-2. QT2 Xplained Pro Extension Header 1
Pin on EXT
Function
Description
1
ID
Communication line to ID chip.
2
GND
Ground
3
Y1
Y-line 1
4
Y2
Y-line 2
5
Y3
Y-line 3
6
Y4
Y-line 4
7
X1
X-line 1 (For use with MCU kits without EXT2 header)
8
X2
X-line 2 (For use with MCU kits without EXT2 header)
9
X3
X-line 3 (For use with MCU kits without EXT2 header)
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Pin on EXT
Function
Description
10
X4
X-line 4 (For use with MCU kits without EXT2 header)
11
I2C SDA
12
I2C SCL
13
Not Connected
14
Not Connected
15
Not Connected
16
Not Connected
17
Not Connected
18
Not Connected
19
GND
Ground
20
VCC
Target supply voltage
Table 4-3. QT2 Xplained Pro Extension Header 2
Pin on EXT
Function
Description
1
Not Connected
2
GND
Ground
3
X1
X-line 1 (For use with MCU kits with EXT2 header)
4
X2
X-line 2 (For use with MCU kits with EXT2 header)
5
X3
X-line 3 (For use with MCU kits with EXT2 header)
6
X4
X-line 4 (For use with MCU kits with EXT2 header)
7
PWM
PWM for IS31FL3728
8
Not Connected
9
Not Connected
10
Not Connected
11
Not Connected
12
Not Connected
13
Not Connected
14
Not Connected
15
Not Connected
16
Not Connected
17
Not Connected
18
Not Connected
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Pin on EXT
Function
Description
19
GND
Ground
20
Not Connected
4.3.
Peripherals
4.3.1.
LEDs
There are 49 blue LEDs arranged in a 7x7 matrix on the QT2 Xplained Pro extension board that can be
used to visualize a touch in the QTouch sensor. All LED's on the boards driven by the LED matrix driver
(IS31FL3728), which is controlled by I2C. For detailed instruction how to interface the LED matrix driver,
please refer to the devices datasheet at http://www.issi.com/.
4.3.2.
Touch Sensors
QT2 Xplained Pro has one 4x4 mutual capacitance touch surface sensor that can be used as touch pad.
Alternatively, the sensor can be configured as a 4 by 4 button array.
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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 QT2 Xplained Pro is A09-2289.
5.2.
Revision 2
Revision 2 of QT2 Xplained Pro (2079) is the initial released version, there are no known issues.
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6.
Document Revision History
Doc. rev.
Date
Comment
42369B
03/2016
Added Electrical Characteristics.
42369A
01/2015
First 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
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1600 Technology Drive, San Jose, CA 95110 USA
T: (+1)(408) 441.0311
F: (+1)(408) 436.4200
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www.atmel.com
2016 Atmel Corporation. / Rev.: Atmel-42369B-QT2-Xplained-Pro_User Guide-03/2016
®
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™
Atmel , Atmel logo and combinations thereof, Enabling Unlimited Possibilities , AVR , QTouch , QT and others are registered trademarks or trademarks of Atmel
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