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					Touch Technology




              Touch Technology
                An Overview
Touch Technology



                   Table of Content
    Atmel‟s Touch Technology
     Division
    Market presence
    Technology Overview
    Changing product design
    Competing Technologies
    Software Library
    Touch screen solutions
    Summary
Touch Technology



       Atmel’s Touch Technology Division
  Leaders in                        Founded as
   capacitive                        Quantum
    sensing                          Research
  technology                       Group in 1996


 Technology:                        Located in
   charge-                         Southampton,
   transfer                             UK


                                    Part of Atmel
 Substantial
                                     corp since
 patent base
                                     March 2008



  Flexible                          Solutions in
  Business                         production for
   Models                            >12 years
Touch Technology



                   Market success to date

Mobile handsets
      Shipped in over 50M handsets
      Over 200M buttons rotors and sliders in handsets
      Over 5m touchscreens
      Customers include Nokia, Motorola, Samsung, Bird, Sagem and Toshiba.

Note books
      Shipped over 2 million buttons and sliders
      Buttons and sliders for function keys
      On/Off buttons
      Shipping in models for HP, Dell and Lenovo
Touch Technology



                          Market Success

Kitchen Appliances
      Shipping in appliances for over 8 years successfully
      More that 20 design wins in various global manufacturers
      Applications in cooker hobs, cooker hoods (extractors) microwave controls,
       refrigerator controls and dishwasher controls.
      Customers include LG Appliances, GE, Whirlpool, Electrolux, Gorenje,
       Samsung, Haier

Consumer Electronics
      Multiple wins in desktop monitors
      Multiple wins in MP3 apps
      Customers include Apple, Philips, Samsung, LG, Bose, Logitech, Neovo,
       Asus, Acer
Touch Technology



                    Technology Overview

 QTouch™             QMatrix™                  QSlide™              QField™
                                               QWheel™              QTwo™




 For 1 to 10 buttons  Up to 48 keys         Linear touch       Single-touch
                                                                   screens
 Simple key shapes  Water resistant         Rotary touch
                       High temperature      3 channels         Multi-touch
 Easy to wire
                                              High resolution     screens



Functionality also implemented through Atmel Touch Software
Library™ – part of AVR® studio
Touch Technology



                         QTouch™



 QTouch – simple solution
    1-10 keys
 1.8V operation
 Low power operations
 UART, SPI and I2C                 QTouch – Popular in
                                    consumer market
 Always stays calibrated
 Patented Adjacent Key Suppression™(AKS™)
    Supports small keypads
 Small footprint – ideal for mobile devices
 Supports clear discrete button touch screens
 Most popular in the consumer market
Touch Technology



               QTouch Basics: Goals




                   Measuring
                    Circuit
                                      Electrode


 Detect finger presence near electrode
 Electrode behind a dielectric panel so no direct galvanic
  connection to measuring circuit



8
Touch Technology



    QTouch Basics: Charge Transfer Basics


                                         Sampling
                         MCU             capacitor


                               S1
                           GND
                           VDD
                                    Cs
                                                         Cx
                               S2
                                                     EARTH
                               S3
                           GND




 Cs >> Cx
 example (1000:1 ratio)
     Cs = 10nF
     Cx = 10pF
 S1,S2 and S3 are CMOS IO pins
     switching between GND, Z and Vdd

9
Touch Technology



        QTouch™: Charge Transfer Basics

 Uses a switched capacitor method
      employing a “sampling” capacitor Cs
      Usually 1000+ times bigger than the sense electrode capacitance Cx
      (normally around 1pF to 10pF)


 The sense electrode is just an “open circuit” pad
      We measure the “self capacitance” of this pad
Touch Technology



        QTouch™: Charge Transfer Basics

 Cs is switched using “bit banging”

 A series of voltage pulses cause current to flow in Cs and Cx
      Charge on Cs builds up by each pulse
      Cx is discharged after each pulse


 The voltage over the Capacitor (U = Q/C) builds up as well

 We measure the voltage by checking a digital input
      Like a comparator, comparing vs VIH


 We measure the number of pulses to reach VIH

 When we touch the sensor, the number of pulses will be
  decreased
Touch Technology



     QTouch Basics: Charge Transfer Basics

                   MCU




                                    Sampling
                               S1   capacitor       Cx
                                                EARTH


                         GND

                         VDD        Cs


                               S2



                               S3


                         GND




12
Touch Technology



           Step 1: Discharge Cx and Cs

                   MCU




                                        Sampling
                               S1       capacitor          Cx
                                                       EARTH


                         GND

                         VDD           Cs


                               S2



                               S3


                         GND




13                        Create Initial condition: Takes time
Touch Technology



                         Step 2: Float Cs

                   MCU




                                    Sampling
                               S1   capacitor       Cx
                                                EARTH


                         GND

                         VDD        Cs


                               S2



                               S3


                         GND




         Prevents cross-conduction between P and N-channel
14       transistors in *some* MCU IO cells
         Well designed I/O blocks does this automatically
Touch Technology



              Step 3: Charge Transfer

                   MCU




                                    Sampling
                               S1   capacitor        Cx
                                                 EARTH


                         GND

                         VDD        Cs


                               S2



                               S3


                         GND




      Rising edge on SNS pin drives charge through Cs into Cx
15
Touch Technology



       Step 4: Float Cs and settling time

                   MCU




                                    Sampling
                               S1   capacitor       Cx
                                                EARTH


                         GND

                         VDD        Cs


                               S2



                               S3


                         GND




16
Touch Technology



     Step 5: Measure Vcs and discharge Cx

                   MCU




                                    SNSK = Gnd

                                           Sampling
                               S1          capacitor       Cx
                                                       EARTH


                         GND

                         VDD              Cs


                               S2

                                    SNS = Vcs
                               S3


                         GND




17
Touch Technology



     Step 5: Measure Vcs and discharge Cx

                   MCU



                                                                      Qx = Cx * Vx
                                    SNSK = Gnd
                                                                      Vx == 0 ==>    Qx == 0
                                            Sampling
                               S1           capacitor            Cx
                                                           EARTH


                         GND

                         VDD               Cs    Qs = Cs * Vcs


                               S2

                                    SNS = Vcs = VDD * (Cx / (Cs + Cx))
                               S3
                                    Cs = ~ 1000 * Cx
                         GND
                                    Vcs = VDD / 1000



18
Touch Technology



                               Repeat 1 - 5:

                   MCU




                                    Gnd

                                             Sampling
                               S1            capacitor               Cx
                                                                 EARTH


                         GND

                         VDD                Cs   Qs = Cs * Vcs


                               S2

                                    Vcs = VDD / 1000 initially
                               S3
                                    Add approximately 0,999 * VDD * (Cx / (Cs + Cx))
                         GND




19
Touch Technology



         Continuously add charge to Cs




          VIH




            When Vcs reached VIH, the I/O port will read as ”1”.
Touch Technology



                   Real Waveform




            Vcs



                                   Vdd




                                   Time
Touch Technology



                   Charging Waveform


                      Vsnsk
                              Vdd




                                    Time




                      Vsns

                    Vdd


                    Vih




                                    Time
Touch Technology



                     Normal mode

Typically uses ~200 pulses to reach VIH
Typical burst length = 500 us .. 5 ms
    Long burst lengths mainly for proximity detection


Run several bursts before declaring detection
    ”Detect integration - DI”
    Similar to debouncing
DI count normally from 3 upwards, 10 = common


Hysteresis: detection level changes on detect
Touch Technology



           Add a finger => Ct increase

                   MCU                                                          Ct
                                                                            EARTH




                                    Gnd

                                             Sampling
                               S1            capacitor               Cx
                                                                 EARTH


                         GND

                         VDD                Cs   Qs = Cs * Vcs


                               S2

                                    Vcs = VDD / 1000 initially
                               S3
                                    Add approximately
                         GND
                                              0,999 * VDD * (Cx//Ct / (Cs + Cx//Ct))



24
Touch Technology



               Effect of increasing Ct

The charge added each pulse will increase.


Cs will charge faster, than if no finger is present


VIH is reached faster


Fewer pulses are needed


Burst time gets shorter
Burst change (delta) is proportional to Ct
Touch Technology



         Continuously add charge to Cs




          VIH




                                Finger present    No finger

            When Vcs reached VIH, the I/O port will read as ”1”.
Touch Technology



                   QTouch™: Sensitivity
 Larger key surface area = more sensitivity


 Sampling Capacitor, Cs controls sensitivity
     Increasing Cs = Increased differential sensitivity
     makes the burst length longer
     Improves resolution


 Simple tuning procedure
     Changing a single capacitor value per key
     Can be done without software


 One time tuning for a design
Touch Technology



                    Technology Overview

 QTouch™             QMatrix™                  QSlide™              QField™
                                               QWheel™              QTwo™




 For 1 to 10 buttons  Up to 48 keys         Linear touch       Single-touch
                                                                   screens
 Simple key shapes  Water resistant         Rotary touch
                       High temperature      3 channels         Multi-touch
 Easy to wire
                                              High resolution     screens



Functionality also implemented through Atmel Touch Software
Library™ – part of AVR® studio
Touch Technology



                         QMatrix™


•   UART, SPI and I2C
•   Efficient X-Y interleaved electrodes
•   Support up to 48keys
•   Low power operations
•   1.8V operation
•   Always stays calibrated
•   Available in small packages (up to 24 Keys)
•   Patented Adjacent Key Suppression™(AKS™) for small keypads
•   Low power and small footprint – ideal for mobile devices
•   Supports clear discrete button touch screens
•   Most popular in the consumer market
                                           QMatrix - Popular in
                                           appliance market and
                                           mobile market
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Self Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance




                          …
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



                   Mutual Capacitance
Touch Technology



        QMatrix™: Charge Transfer Basics

 Also uses a switched capacitor method
      employing a “sampling” capacitor Cs that is usually 1000+ times bigger than
       the sensor capacitance Cx (normally around 1pF to 5pF)


 The sensor in this case is formed at the
      “intersection” of two electrodes, X (transmitter) and Y (receiver).
 In other words QMatrix measures the *mutual* transverse
  (usually) coupling capacitance between X and Y

 X and Y
      Fixed number of voltage pulses
      Each pulse cause current to flow in Cx and Cs (in series with each other)
      Current only flows in selected pairs or Cx and Cs.
      This is how a sequential matrix scan is achieved


 The voltage on Cs builds up pulse-by-pulse and after the fixed
  number of pulses is done, the voltage on Cs is measured to give
  us our reading
Touch Technology



           QMatrix™: Charge Transfer Basics
                                                             X0

           MCU
                 VDD                                         X1

                     S2         X
                                                             X2
                     S4
                 GND
                               Yk               Cx           X3

                     S1
                 GND
                                    Cs                                         Y0



                                                                               Y1
                     S3         Y   Sampling
                 GND                capacitor


    Vsns


                                                     |Vcs|


                                                                  Approximately linear

                                         Time                              0.25V


                                     t

                     -0.25V                                                         Time

                 Terminal voltage                    Vyk
Touch Technology



        QMatrix™ : Measuring Technique
We can use Atmel AVRs e.g. Tiny44/84/88, Mega48/88/168 (including
  PicoPower), Mega164P/324P for QMatrix because they have the
      required internal comparator + counter/capture registers

                  MCU
                        VDD


      CTR         CLK
                         S2   X
                         S4                         Vcs
                        GND
                    +
                              Yk               Cx
     CAPTURE
                    -
                         S1
                        GND        Cs
            VDD                                               Time
       S5
                                        Rsmp
       S6                     Y
                         S3
            GND
                        GND

            SMP
Touch Technology


          QMatrix™ Basics: What Happens During
                        Touch ?:
                                          Now we bring a finger close to
                                           electrode
                                          This diverts charge from Cx, and so
E-field
                                           away from Cs
                                    Ct

                X   Y       EARTH
                                          So each charge pulse now charges Cs
          Vcs
                                           by a smaller amount
                      No
                    touch                 This means charge builds up in Cs
                                Time
                                           less quickly
                                          So if each pulse deposits less charge,
          Vcs
                                           then Vcs rises slower, so
                                             reaches a smaller terminal voltage
                    Touch
                                Time         needs less time to discharge to GND
                                             so counter value gets less
                                             count change (delta) is proportional to
                                Delta         Ct
Touch Technology



                   QMatrix™: Sensitivity

Optimise key designs for improved sensitivity
 and SNR

Increasing Burst Length (number of charge
 pulses), increases sensitivity
    Software based tuning
    Does not require component changes


Increasing Rsmp, increases signal resolution

One time tuning for a design
Touch Technology



      Atmel’s Charge Transfer Technology

Best in class solutions:
   Excellent signal-to-noise ratio
   Excellent field penetration
   Spread spectrum modulation
   Failure mode detection
   Best in class EMC characteristic


Ease of design:
 Highly integrated solutions
 Reference designs


Flexible:                              QMatrix™ charge transfer principle
 Standard or custom products
 User developed solutions


Cost effective
Touch Technology



                    Technology Overview

 QTouch™             QMatrix™                  QSlide™              QField™
                                               QWheel™              QTwo™




 For 1 to 10 buttons  Up to 48 keys         Linear touch       Single-touch
                                                                   screens
 Simple key shapes  Water resistant         Rotary touch
                       High temperature      3 channels         Multi-touch
 Easy to wire
                                              High resolution     screens



Functionality also implemented through Atmel Touch Software
Library™ – part of AVR® studio
Touch Technology



     QSlide™ & QWheel™ - Easy scrolling

 Usable over LCD display
 iPod-type functionality
 Low voltage, low power
 Slider/Wheel available in
  QTouch devices: QT1106
 Slider available in QMatrix
  device: AT42QT2160
 Only three channels used to
  make a 256 position absolute
  scroller
                                 QSlide/QMatrix - Popular in
                                 personal media devices
Touch Technology



         QSlide™ & QWheel™: QTouch™




            i) Small                ii) Medium/Large
         20-25mm long                 25-60mm long




   i) Small 10-
                   ii) Medium 12-
    12mm dia
                       16mm dia          iii) Large 16-40mm dia
Touch Technology



        QSlide™ & QWheel™: QMatrix™

  One Layer Designs              X7        X0


                             X6                       X1

                                                           Y

                             X5                       X2


                                  X4         X3

      X0           X1   X2             X3

                                                  Y
Touch Technology



        QSlide™ & QWheel™: QMatrix™

 2 Layer Designs -                    X5       X0
  Flooded X
 Increases design                                   X1
  possibilities                   X4                      Y

 Improved directional
  noise immunity
                                           X3   X2

       X0          X1   X2   X3


                                       Y
Touch Technology



    QSlide™ & QWheel™ : Touch Position

            A



                                          X




    C              B
                                                S
                          A                            B



    Uses geometric calculations in between 2 points
     (channels) to determine absolute touch position
Touch Technology



Capacitive sensing - changing product design

 Flexible
    No longer restricted to
     using buttons
    Increasing focus on
     industrial design
    UI innovation with multi-
     touch
 Innovative
    Slimmer products - no
     mechanical parts required
    Easy to clean
    Hidden until lit
Touch Technology



                   Other Markets

Capsensing is not only for Mobile and
 appliances….Atmel have many design wins in
 …..
Medical
Automotive
Industrial
Vending
Security
Toys
Touch Technology



Atmel Industry Presence : recent design wins
    Mobile and PND                       Consumer

                                            Laptops
   Mobile phones                      Digital photo frames
   Smart phones                     TVs and Home cinemas
     Headsets                        Stereos and speakers
      PNDs                                MP3 players




                          Ovens
                       Refrigerators
                     Washing machines



                        Appliance
Touch Technology



                   Atmel advantages

Early market entry – long experience
Addresses many diverse markets
Robust solution
    Very few competitors are even close
Competitor analysis data available on request
Touch Technology



       Differentiation: Atmel Touch Sensors
 Very high signal to noise ratio
      Makes designs easier from the outset
      Supports small sensors
      OK in noisy environments


 Broad range of key sizes & shapes
      due to size of integration capacitors
      Inherent flexibility of technology


 Key patent for close pitched key arrays
      Adjacent Key Suppression (AKS™)
Touch Technology



                                   QMatrix
 Strong suppression of moisture effects
      Due to X and Y electrode design and touch aquisition
 Remote placement of chip
      Sensitive to X/Y crossing
      Not sensitive to X lines
      Not sensitive to Y lines
Touch Technology



                  QTouch/QMatrix on AVR
 AVR has plenty of processing power.
      Can complete sensing faster
      Can spend more time in sleep


 Minimal amount of H/W needed
      Chip resource available for other applications


 Lower power consumption


 Broad range of applications with a lower cost chip
Touch Technology




            Q-Touch/Q-Matrix libraries



         Empowering Atmel AVR users with
              Touch Sensor Technology
Touch Technology



                   Aims of libraries

 Flexible, high performance capacitive sensing firmware

 Well proven capacitive sensing solution

 Support for buttons, sliders and wheels

 Easy to implement

 No license fee

 Can coexist with user application
Touch Technology



    Advantages of the Atmel Code Module

 Recognised industry leading Charge Transfer technique

 Best signal to noise ration
      Makes designs fundamentally easier to implement

 Flexible implementation
      arbitrary key sizes & shapes
      no need to balance channels

 All digital technique
      None of the disadvantages of analogue sensing techniques

 Easy implementation using Quantum reference designs

 Access to key Atmel/Quantum patents
      Adjacent Key Suppression
Touch Technology



    Advantages of the Atmel Code Module

 Uses AVR as the hardware platform
      AVR32, Cortex-M3 to follow

 Industry leading microcontroller price / performance

 Lowest power consumption

 Broad product range can be developed & implemented

 Fully flexible user implementation
Touch Technology



    Advantages of the Atmel Code Module

 Simple, easy to implement code library
      Robust front end capacitive acquisition


 Highly experienced Quantum Atmel team
      Applications / implementation support

 Low cost solution

 No license cost

 Support provided by the Atmel FAE‟s
Touch Technology



               Code Module Availability

 Code modules will be available in two basic versions
    QTouch module – recommended as first approach
         - High sensitivity
         - High system noise tolerant
         - Easy design
    QMatrix module
         - Less pins needed for 3+ channels
         - More tolerant of moisture and ground loading
         - Electrode design needs care
 Support packages available in both cases
      Library module and API
      GUI front end
      Evaluation module & PC Application Software
      Reference implementation & application note
Touch Technology



   Atmel Touch Software Library - Flexible

Available on standard Atmel
 parts using libraries in AVR
 studio
Environmental changes           Host
                                  App
                                        Atmel
                                        Touch
 tracked and compensated                Software
                                        Library


Error conditions detected and
 corrected
Works seamlessly with main
 device application
For volume programs,
                                        Atmel
 application and code            Host
                                 App    Touch
                                        Software
 development available                  Library
Touch Technology




   Atmel Capacitive Touchscreen
            Solutions

        Two Touch™ and Single Touch Touchscreens

                   Roadmap for Touchcreens

                        January 2009
Touch Technology



     Projected Capacitive Touch Screens
 Sensors realised with patterned conductors
    Usually realised using ITO/PET or ITO/Glass
    Mostly 2+ layers, Atmel‟s solution supports single layer sensors
 Multiple sensing elements
 Sequential sensing
 Advantages
    Excellent signal to noise ratio
    Accuracy across the whole
     surface
    Can support multiple touches
    Senses through „thick‟
     dielectric materials
    No user calibration needed

                                            Atmel’s QField™ technology
Touch Technology



         Introducing the QT5000 Family




           Two Touch™ for the most intuitive user interfaces
Touch Technology



            QT5000 Family Unique Value

 The QT5320 and the QT5480 are single chip Two
   Touch™ touchscreen controllers supporting
           single and two finger touch

 Currently up to 48 channels (8X x 6Y)
 Supports Single Touch and Dual
  Touch
 Many common touch gestures
  integrated
 Standard touchscreen reference
  designs available
 Highly user configurable interface
 Small 5mm x 5mm BGA package
 Low power, low voltage
Touch Technology



         Introducing the QT4000 Family




           Touchscreen solution with single layer sensors for
             the thinnest possible implementation
Touch Technology



            QT4000 Family Unique Value

     The QT4120 and the QT4160 are single chip
     touchscreen controllers enabling single layer
                   sensor designs


 Currently up to 16 channels (4X x 4Y)
 Supports Single Touch with Single
  layer sensors
 Many common gestures integrated
 Reference designs standard
  screen sizes
 Small 5mm x 5mm QFN package
 Low power, low voltage
Touch Technology



            Components and Supply Chain


 Atmel provides
      Touch controller IC
      Controller board reference
       design
      Sensor reference design
      Integration support
      Sensor test equipment design


 Atmel Partners provide
      Tested and qualified sensor film
      Integration of sensor and front
       panel
      Production controller board


                    Note: Solution with integrated sensor,
                           front panel and LCD can delivered
Touch Technology




                   Target
                   Applications
Touch Technology



        User Interface in Mobile Phones
Touchscreen mode
    Managing the address book
    Managing the photo album
Fixed keys and sliders
    On/Off keys
    Special function keys
    Volume controls
Touch Technology



        User Interface in Media Players
Touchscreen mode
    Music control
    Photo control
    Zoom and Rotate
Fixed keys and sliders
    On/Off keys
    Special function keys
    Volume controls
Touch Technology



    User Interface in Navigation Systems
Touchscreen mode
    Controlling the maps
    Zooming in and out
Fixed keys and sliders
    On/Off keys
    Special function keys
Touch Technology



            Other Target Applications

Digital still cameras
Digital picture frames
Appliance control
Gaming devices
PDAs
Displays
Touch Technology



                   Easy System Designs




            Touchscreens, sliders, wheels and/or keys,
            selectable by the host via the I2C compatible interface
Touch Technology




                   Appendix



   Atmel‟s Portfolio of Touch Sense Products
Touch Technology



            QTouch™ - Key std. Products
     Devices for 1 to 10 keys and/or sliders/wheels
   Part         Channels        Package    Temp. (OC)     Eval.Board

   QT100A            1           WSON-6      -40 to +85   E100S

   QT220             2           SSOP-20     -40 to +85   E240B

   QT240             4           SSOP-20     -40 to +85   E240B

   QT1080            8            QFN-32     -40 to+85    E1080

   QT1101            10           QFN-32     -40 to +85

   QT1081            8            QFN-32     -40 to +85   E1081

   QT1103            10           QFN-32     -40 to +85   E1103

   QT1106       7 + Slider or     QFN-32     -40 to +85   E1106
                   Wheel
   AT42QT1040        4            QFN-28     -40 to +85   AT42EVK1040
   AT42QT1060        6            QFN-28     -40 to +85   AT42EVK1060
Touch Technology



           QMatrix™ - Key std. Products
    Controlling up to 48 keys and/or sliders/wheels
    Part         Channels     Package    Temp. (OC)     Eval Board

    QT60160          16        QFN-32      -40 to +85   E6240
    QT60168          16        TQFP-32    -40 to +105   E6248
    QT60240          24        QFN-32      -40 to +85   E6240
    QT60248          24        TQFP-32    -40 to +105   E6248
    QT60326          32        TQFP-44    -40 to +105   E6486

    QT60486          48        TQFP-44    -40 to +105   E6486

    AT42QT2160       16        QFN-28      -40 to +85   AT42EVK2160
                   1 Slider
Touch Technology



                        Atmel Touch Library
 AT42EVK2080A – QTouch module with ATmega88 target device
        Hardware module – user can view and evaluate trial implementations of
         firmware
        10 x ATMega88 IC‟s
 AT42EVK2080B – QMatrix module with ATtiny88 target device
        Hardware module – user can view and evaluate trial implementations of
         firmware
        10 x ATMega88 IC‟s
 Common to both evaluation modules
        Installation CD for PC configurator software
        Quickstart guide including basic operating / flashing instructions / what
         hardware required
        Debug interface allowing rapid visualisation of the pre-processed capacitive
         signals for diagnostics
   API document
   Description of interface & how to use
   Reference implementation
   Compile instructions
   Links to useful sources of additional code
   PC debug application for tuning implemented systems
Touch Technology



   QField and QTwo Touchscreen Products

         Easy to Use Touchscreen Controllers
Part         Total       Package       Touch          Screen   Eval Board
             nodes                                    Size


AT42QT4120    12 (4x3)     QFN-32      Single touch     3.2”   EVK4120A/B

AT42QT4160    16 (4x4)     QFN-32      Single touch     4.3”   EVK4160A/B


AT42QT5320    32 (8x4)     QFN-32      Single touch     4.3”   EVK5480x
                                        /Two touch
AT42QT5480    48 (8x6)   BGA-49 QFN-   Single touch      8”    EVK5480x
                          44 TQFP-44    /Two touch

				
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