©2009 integrated device technology, inc. integrated device technology the analog and digital...

©2009 Integrated Device Technology, Inc.

Integrated Device TechnologyThe Analog and Digital Company

Capacitive Touch Solutions

Arrow Seminar – Paris

October 2011

Ian Cook

Senior FAE

[email protected]

CONFIDENTIALPAGE 2 CONFIDENTIALwww.IDT.com

Mixed-signal, application-specific solutions

Founded 1980

Workforce Approximately 2,000 employees

Headquarters San Jose

Core ExpertiseTiming, high speed mixed signal design, serial interconnects, memory interfaces, power management, video, audio, and capacitive touch

Sales Channels Worldwide network of direct, manufacturing representatives, and distribution sales

FinancialsFY11 Revenue - $625.7M, Market Cap - $1B, Cash Investments – Approx. $300M

Research and Development $150M+/ year, leading to 900+ issued or pending patents

Snapshot


Application-Optimized Mixed-Signal Solutions

• Maximum system performance• Lowest overall Bill-of-Materials

• Shortest time-to-marketSystem

Expertise

Analog

Analog

The Analog and Digital Company™

The World Leader in Timing, Serial Switching and Interfaces

● in Silicon Timing

● in Memory Interfaces

● in DisplayPort™

● in RapidIO® Switching

● in PCIe® Solutions

● in Business PC Audio

● in VME Bus Solutions

● in PowerPC® Host Bridges

• Communications

• Computing

• Consumer

Re-thinking the system to architect a better solution


IDT Advanced User Interface Group

PureTouch™ Capacitive Touch Solutions


PureTouch™ Buttons Roadmap

Buttons/Sliders/

Click Wheel

2009 2010

LDS612xTS+LED (Enhanced)

LDS610xTS (Enhanced)

8 Products

LDS620xTS Low Ch with

Prox Sense

4 Products

2008

LDS60xxTS/LED/HD

11 Products

LDS65xx

In Definition

LDS700xSingle Layer Full

Touch Screen

2 Products


LDS700xTrue Single Layer Full Touch Screen


Value Proposition / Key Benefits

• True One-Layer Multi-Touch Sensor• Eliminates up to two ITO layers• Saves significant sensor cost• Improved light transmissivity, superior

display quality• Better yield, simpler to manufacture

• Eliminates Multi-Touch Ghosting• Sensor elements not arranged in matrix• Unique signature for multi-touch points• Accurate X/Y coordinates enabling

customers to create custom gestures on host

• Reliable Multi-Touch Detection and Linearity in all Dimensions

• No problems detecting multiple touches in any direction

• Good linearity in any direction

XX

IDT Proprietary1-Layer Pattern


About the Family

● The LDS700x Family consists of two products

● The LDS7000 offers up to 30 channels and may be used for screen sizes of 3.5” and less

● Serial I/F is I2C only● 40ld 5x5mm QFN Package

● The LDS7001 offers up to 35 channels and may be used for screen sizes of 5” and less

● Serial I/F is I2C or SPI● 48ld 6x6mm QFN Package

LDS7000 LDS7001

# of Sensors Up to 30 Up to 35

GPIO - 1

Package 5x5mm 40ld QFN

6x6 48ld QFN

Supported I/F I2C I2C, SPI

Screen sizes Up to 3.5” Up to 5”


Product Overview● Proprietary, Advanced

Algorithms● Single and dual touch applications● Supports IDT’s proprietary true single

layer sensor

● 2.7-3.6V power supply voltage

● 1.8-3.6V supply voltage for I2C

● Touch controller operating power

● Full power mode during no touch <4mW (2.7V, 8ms data rate)

● Full power mode during touch <9mW (2.7V, 8ms data rate)

● Optional power reduction capabilities

● SPI / I2C-compatible serial interface (SPI only available on LDS7001)

● GPIO (LDS7001 only)

● Rich set of customer configurable options

● 40 (LDS7000) and 48-pin (LDS7001) TQFN packages

Status Fully Qualified

Availability

Now

Production

Now

Sensor Mux

Clock Control

Power Manage

ment

DMA Controller

Inte

rnal

Bus

Timers

Interrupt Control

GPIO

I2C Slave

SPI Slave

64KB FLASH

CDC Control

CDC

Data SRAM 8KB

CPU

Instruction SRAM 32KB

EJTAG/TAP

LDO

1.2V

VCAP

VDD

35 Sensors

SHIELD

LDS7001

HOST CPU

SPI/I2C

HandShake

Reset

VDDIO


Typical Application Diagram & Packaging

● Optimized BOM - 2 decoupling capacitors, 2 pull-up resistors

● Interface flexibility: Support for either I2C or SPI (LDS7001)

● IC typically mounted on touch screen flexible printed cable● Contact factory for applications requiring IC implementation on main PCB


LDS7000 EVK Gestures

YJ Lee

● FTS Gestures

● Flick Next/Prev. image

● Scroll & Next/Prev. image

● Go to first image

● Go to last image

● Single touch rotation

● Pinch : zoom in/out

● Dual touch rotation

left

right

or

or

Single/double tap : make a bubble

Pinch: zoom in/out Two finger drag : rotate left/right Two Finger drag : 3D perspective

Two Finger diagonal drag: 3D angleOne finger drag: pan

• Additional Gestures (New Ones in Purple)


Key Applications

●Mobile Handset

●GPS

●PMP/Portable Consumer Electronics

●Tablet PCs

KEY APPLICATIONS


LDS6xxx PureTouchTM

Family Overview


PureTouch™ Design Ins/Wins

Gionee HandsetLDS6005

JVC Mini Component HiFiLDS6020 x 2

Lenovo All-In-One PC*LDS6126

Digital Picture FrameLDS6028

Konka HandsetLDS6005

Hanvon eBook ReaderLDS6107 x 2

Lenovo All-In-One PC*LDS6128


Ultra-low Power Consumption

Competitors

Zero Latency Touch Sensor Power Consumption

*1.8v supply, VDD1 power, 50uW low power consumption with added latency of ~0.1s

LDS6100 Lowers Active Power Consumption to <125uW*with Optional Lower Power Mode for <50uW* Consumption

IDTLDS61xx

Enables Power EfficientContinuous Scan of

Buttons w/o High-LatencySleep Modes


Touch Controller DifferentiationUltra-low Touch Sensor Power Consumption

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

0 200 400 600 800 1000 1200

Latency (ms)

Po

we

r C

on

su

mp

tio

n (

mW

)Lower Power Modes: Latency vs Power

A

E

D

J

BC

J

IDTLDS61xx AE

E

II

PureTouch™ Enables “Zero-Latency” Performance at Power Levels Associated with 1s or Greater Latencies


TIP (Thresholds Individually Programmed)

●Touch/No-Touch Thresholds Set Individually

● Programmable in Real-Time• No external components required

●Users May Dynamically Adjust Each Button to Desired Sensitivity Level

Individual Sensitivity Threshold per ChannelAdjustable by End-User → Enhanced User Experience


STS (Strongest Touch Selection)

●Selective Touch Modes (patent-pending)

● Strongest Touch● Two Strongest Touches

• For multiple key activation (e.g. Shift, CTRL key functionality)

●Prevention of Inadvertent/Unintended Touches

PCB

C0 C1 C2 C3 C4

C5 C6 C7 C8 C9

C10 C11 C12 C13 C14

C9

C14 Activate Strongest

Touch

Oops!


Automatic Calibration●Automatic On-chip Calibration Adjusts for:

● Temperature ● Humidity ● Dust● Noise● Etc.

●Establish an Accurate Baseline for Each Sensor

● Each sensor uniquely calibrated and compensated for

● Ensures maximum responsiveness to true touch events


Ease of Use: Elegant ASIC Solution● uC-based Solutions Complicated

● 1 uC-based Solution Datasheet

● 2 uC-based Solution Datasheet

● IDT

● Fast Time to Market and Fewer Engineering Resources with IDT PureTouch®

● Evaluation to Pre-Production Builds within 1 month

290 pages!

LDS6028Register Map(Touch + LEDFunctionality)

30-40 pages!

298 pages!


Few Externals (Low BOM Cost)


Features: Integrated Keypad LED Driver

● Flexible Configuration● Sensor inputs or LED driver configurable

● Closed Loop Visual Feedback● No-host synchronization w/touch events

•Programmable LED Driver-to-sensor assignment● No variable "touch → LED" latency caused by host delays•Immediate LED illumination

● Configurable Effects Configurable Per LEDBlinking

Heartbeat

Dimming


IDT PureTouch® Example

Zero Passives Required for Each Button - 1 Sensor per Button (Efficient Pin Use)

Built-in LED Drivers - Zero Passives Required for each LED

No Voltage Regulator Required- Only 1 decoupling capacitor per supply

No passivesfor LED driverfunction


LDS61xx Family Enhancements


Interface Enhancements – LDO & SMBus

● Expanded Voltage Range (1.65-5.5V)● Eliminates need for external LDO

● Native SMBus Support for PC Applications

● SMBus, I2C, SPI all available on same IC using IFSELx pins

LDO

LDS61xx5.0v Supply

5.0vLDOX

LDO Touch IC5.0v Supply1.8v


C10/LED0C12/LED1C12/LED2C13/LED3C14/LED4C15/LED5C16/LED6C17/LED7

C18/LED8C19/LED9

SHIELDSENSOR PCB

SSBSCLKMOSIMISO

CSBSCLK

SDISDO

Host Processor With SPI

VDD1

VDDIO

VDD2

VSS1

VDD

VDDIO (1.65V~5.5V)

INTB

VDD1 (1.65.V~1.95V)

GPIOTEST0-2

INTB

I/F SEL 0/1

LDS61xx

floatingfloating

VSS

C1

RESETBRESETB

VSS2

VDD2 (3.0V~5.5V)

C2

C0/DCM10C1/DCM11C2/DCM12C3/DCM13C4/DCM14C5/DCM15C6/DCM16C7/DCM17C8/DCM18C9/DCM19

Outputs change statewhen touch occurs

1:1 correlationWith each button)

Interface Enhancements - DCM Option

● DCM = Direct Communication Mode● Option for dedicated output to host (1 status pin per touch button)

● Eliminates need to query touch controller over serial I/F● Ideal for mechanical button emulation


Touch Enhancements● Channels Increased to 20 (from 15)

● Configurable Hysteresis and Debounce

● Why Do You Need Debounce and Hysteresis?

Time

Threshold LevelTouch

No-Touch

Cap

acita

nce

Val

ue

Natural Finger Bounce WhenTouching Rigid Surface


Touch Enhancements – Debounce and Hysteresis

● Debounce: Set Time Criteria for Stable Touch

● Hysteresis: Establishes “Untouch” Threshold Referenced from Touch Threshold

● “Untouch Threshold” < Touch Threshold● Establishes buffer region to compensate for reduction of capacitive signal (from finger bounce) without causing multiple touch/untouch signals to be generated

Time


No-Touch

Cap

acita

nce

Val

ue

Time


No-Touch

Cap

acita

nce

Val

ue

Debounce:Min Time Criteriafor Valid Touch

Time

Touch Threshold LevelTouched

Not Yet Touched

Cap

acita

nce

Val

ue

“UnTouch” Threshold LevelStill Touched“UnTouched”

Hysteresis Buffer Region: Once Above TouchThreshold, Touch Persists As Single Event Until Capacitive Strength Is Below “UnTouch” Threshold

TouchRecognized

Debounce:Min Time Criteriafor Valid Touch

Touch NOTRecognized

Hysteresis:Single Touch Event Since Capacitive Value Remains Above Untouch Threshold at All Times

TouchRecognized


Touch Enhancements – Slider/Scroll Support

● Built-in Slider/Scroll Support● Touch position and movement direction natively supported● 2x interpolation built-in

E2

E1

E3

E4

E5E1

E2

E3

E4E5

E6

E7

E8

Touch Positions:1 = E12= E1&E23 = E24 = E2&E35 = E36 = E3&E47 = E48 = E4&E59 = E510 = E5&E1 (scroll only)

Touch Positions:1 = E12= E1&E23 = E24 = E2&E35 = E36 = E3&E47 = E48 = E4&E59 = E510 = E5&E611 = E612 = E6&E713 = E714 = E7&E815= E816 = E8&E1 (scroll only)

E1 E2 E3 E4 E4E3E2E1 E5E5 E6 E7 E8

Note: These examples show simplified representations of 5 and 8 element sliders & scroll wheels. Actual # of elements may be programmed during initial configuraiton.


Guard/Suppress Channel

● Ability to Designate Channel(s) as Guard Channel● Select associated channels to be suppressed/masked when guard channel is touched

● Enables Protection from Accidental Activation of Touch Buttons

● Enables Touch Panel Wipe-Down● Wipe-down without activating buttons

Guard Channel

MaskedChannels

Touch Panel

C0 C1 C2 C3 C4

C5 C6 C7 C8 C9

C10 C11 C12 C13 C14

Guard Channel


LDS6100 TS/LED Family

LDS6104

LDS6107

LDS6108

LDS6100

LDS6124

LDS6126

LDS6128

Up to 8

Up to 13

Up to 16

Up to 20

Up to 8

Up to 11

Up to 16

Up to 10

Up to 4

Up to 5

Up to 8

28ld TQFN

28ld SSOP

Touch Sensors

DCM Outputs

LED Driver

Built-in LED Effects

Package

Integrated FeaturesIntegrated Functions

LDS6120

40ld TQFN

Up to 4

Up to 5

Up to 8

Built-in Slider/ Scroll

Full Hystersis & Debounce

Configurability

28ld TQFN

28ld SSOP

40ld TQFN

Part #

New/Enhanced Features

√ √

√

Up to 4

Up to 6

Up to 8

Up to 20 Up to 10 Up to 10

*Supports I2C, SMBus, and SPI interfacesFrom Previous Generation


IC Board w/External Sensor I/F

Multi-pitch I/Fpoint for

external sensor boards

LDS6xxx Controller IC

Evaluation/Tuning Kits Available

● Enables Configuration/Tuning with Easy-to-Use Graphical User Interface (GUI)

● Allows Use of Customer Sensor Board

Sample Sensor Board (Provided)


LDS62xx Low Channel FamilyEnhancements


Major 6200 Enhancements

● Even Lower Power Consumption● >20% reduction in full power current consumption vs LDS61xx series (50uA typ in full power mode)

●Per Channel Debounce Configurability● Enables variable time touch activation per button, adjustable using registers• Example: Power button on: quick touch, off: longer touch; other buttons always quick

Full Power Current Consumption

0

25

50

75

100

LDS Family

Cu

rre

nt

in u

A

6000 6100 6200


Major 6200 Enhancements (con’t)● Enhanced Proximity Sensing

● For recognition of proximity prior to actual touch

● Power-On Touch Detection● Detect touches present before reset/power cycle

•For trouble shooting or accessing special test modes

DIAGNOSTIC/TEST MODE


Introducing the LDS6200 TS Family

LDS6201

LDS6202

LDS6203

LDS6204

Up to 2

Up to 4

Up to 6

Up to 8

Touch Sensors

Enhanced Proximity

Sense

Built-in Slider/Scroll Package

Integrated FeaturesPower On

Touch Detection

Full Hystersis ConfigurabilityPart #

New/Enhanced Features

√3mm x 3mm

20ld TQFN20ld SSOP

√ √√

3mm x 3mm

16ld TQFN16ld SSOP

Per Channel Debounce

Configurability

√

From Previous Generation

All enhanced features from 61xx family except DCM & LEDdrivers. Adds lower power, per channel debounce, proximity sense, and power on touch detection. I2C only.


LDS60xx Family with Haptics Driver


Why Integrate Haptics?

●Increases Usability and Enhances User Experience for Touch Controls

●Reduces ‘Glance Time’● Positive confirmation in

noisy/distracting settings

●Doesn't Distract like Audio Feedback

●Product Differentiator

Well over 70M Haptics-Enabled Devices Shipped in 2009

Beep

Beep

Beep

Beep


Integrated Haptics Driver

●World's First Touch Controller with Integrated Immersion TouchSense®-Ready Haptics Driver

● Available with LDS6010/6018/6040/6048 Controllers● Support for ERM and LRA Actuators

●Immersion License Included● Rapid implementation of highquality tactile feedback effectsfrom one vendor (“one-stop shop”)

TouchSense®

TactileFeedback

Immersion, the TouchSense logo, and TouchSense are trademarks off Immersion Corporation in the United States and in other countries, and used with permission


Full Fidelity Haptics Driver

●Capable of Highest Quality Tactile Effects

● Crisp response, magnitude control, braking functions

●TouchSense®-Ready Certification●Integrated Regulation for Connection to Vbatt

● Consistent haptics experience across voltage

Immersion, the TouchSense logo, and TouchSense are trademarks off Immersion Corporation in the United States and in other countries, and used with permission

Integrated Vreg


Haptics Not Only for Mobile Phones. . .


LDS60xx TS/LED/HD Family

* Slider/Scroll Wheel Requires host-side code for location identification and scroll/slide direction

+ 3 softkeys 40ld TQFN

Part #Touch

SensorsLED

DriverSlider/ Scroll

Wheel*Full 12-key

KeypadPackage

ApplicationsIntegrated Functions

LDS6040/48 Up to 15 Up to 8

Haptics Driver

LDS6010/18 Up to 15 √

√√

● LDS6010 and LDS6040 target portable applications up to 3.6V

● LDS6018 and LDS6048 target non portable applications up to 5.5V

● Direct Drive Haptics Output Voltage : No Intermediate Amplifier allowed between Haptics Driver and Actuator


Low Resolution Touch Screens

A low cost, innovative implementation


● ITO Button Advantages● Cost effective

• Use button IC versus full resolution touch screen IC (save $1.00-$1.50 in IC costs)

● Lower power• IDT controllers consume only 50-70uA in fast-response full power mode compared to 1.5-3mA for full resolution controller ICs

● Robust Performance• On/Off (0D) versus algorithmic interpolation of X/Y touch position (2D)

ITO Buttons: Bridge to Full Resolution

● For touch screen applications requiring low-to-mid-resolution, ITO buttons may be used in place of a full resolution touch screen

● 20-40 touch zones -> Button Touch Screen● Discrete buttons (1 sensor per button)

● 40-100 touch zones -> Matrix Touch Screen


● One touch sensor channel per touch zone● Any number of buttons active at a time

● Single Layer Panel● 1 Button Controller IC controls up to 20 zones

● Gesture Recognition on Host Possible

Button Touch Screen (1-40 zones)

LDS6100

20

I2C orSPI toHost


● One row/one column activation per touch zone

● 1.5 or 2 Layer ITO Panel● One Button Controller IC● Gesture Recognition on Host Possible

Matrix Touch Screen (40-100 Zones)

C0C6

C0C7

C0C8

C0C9

C0C10

C0C11

C0C12

C0C13

C1C6

C1C7

C1C8

C1C9

C1C10

C1C11

C1C12

C1C13

C2C6

C2C7

C2C8

C2C9

C2C10

C2C11

C2C12

C2C13

C3C6

C3C7

C3C8

C3C9

C3C10

C3C11

C3C12

C3C13

C4C6

C4C7

C4C8

C4C9

C4C10

C4C11

C4C12

C4C13

C5C6

C5C7

C5C8

C5C9

C5C10

C5C11

C5C12

C5C13

LDS6100

14

I2C orSPI toHost


Summary of Value Proposition


IDT Value Proposition Summary● Low Power

● Extended battery life, green● <70uA in full power mode● <25uA with intermittent sleep● No compromise in touch response

● Robust & Feature Rich

● Individual touch sensitivity control

● Built in slider/scroll wheel support

● Automatic calibration● False touch suppression● True LED drivers with built-in

effects● High Noise Immunity

● Simple to Design In● Optimized state machine● Smaller footprint solution● Low system BOM cost


IDT Touch demo videos

Full Resolution Touch Screen: http://www.youtube.com/watch?v=O9xZ-L9P8Go

Button Touch Screen: http://www.youtube.com/watch?v=uvFCtM3IQ3U

Matrix Touch Screen: http://www.youtube.com/watch?v=d7SH_Ih4WhE


Thank You

谢谢

謝謝ありがとう

Kiitos

Tack

Merci

감사합니다

©2009 integrated device technology, inc. integrated device technology the analog and digital...

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