©2009 integrated device technology, inc. integrated device technology the analog and digital...
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©2009 Integrated Device Technology, Inc.
Integrated Device TechnologyThe Analog and Digital Company
Capacitive Touch Solutions
Arrow Seminar – Paris
October 2011
Ian Cook
Senior FAE
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
CONFIDENTIALPAGE 3 CONFIDENTIALwww.IDT.com
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
©2009 Integrated Device Technology, Inc.
IDT Advanced User Interface Group
PureTouch™ Capacitive Touch Solutions
CONFIDENTIALPAGE 5 CONFIDENTIALwww.IDT.com
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
©2009 Integrated Device Technology, Inc.
LDS700xTrue Single Layer Full Touch Screen
CONFIDENTIALPAGE 7 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 8 CONFIDENTIALwww.IDT.com
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”
CONFIDENTIALPAGE 9 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 10 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 11 CONFIDENTIALwww.IDT.com
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)
CONFIDENTIALPAGE 12 CONFIDENTIALwww.IDT.com
Key Applications
●Mobile Handset
●GPS
●PMP/Portable Consumer Electronics
●Tablet PCs
KEY APPLICATIONS
©2009 Integrated Device Technology, Inc.
LDS6xxx PureTouchTM
Family Overview
CONFIDENTIALPAGE 14 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 15 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 16 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 17 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 18 CONFIDENTIALwww.IDT.com
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!
CONFIDENTIALPAGE 19 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 20 CONFIDENTIALwww.IDT.com
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!
CONFIDENTIALPAGE 21 CONFIDENTIALwww.IDT.com
Few Externals (Low BOM Cost)
CONFIDENTIALPAGE 22 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 23 CONFIDENTIALwww.IDT.com
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
©2009 Integrated Device Technology, Inc.
LDS61xx Family Enhancements
CONFIDENTIALPAGE 25 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 26 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 27 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 28 CONFIDENTIALwww.IDT.com
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
Threshold LevelTouch
No-Touch
Cap
acita
nce
Val
ue
Time
Threshold LevelTouch
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
CONFIDENTIALPAGE 29 CONFIDENTIALwww.IDT.com
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.
CONFIDENTIALPAGE 30 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 31 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 32 CONFIDENTIALwww.IDT.com
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)
©2009 Integrated Device Technology, Inc.
LDS62xx Low Channel FamilyEnhancements
CONFIDENTIALPAGE 34 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 35 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 36 CONFIDENTIALwww.IDT.com
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.
©2009 Integrated Device Technology, Inc.
LDS60xx Family with Haptics Driver
CONFIDENTIALPAGE 38 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 39 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 40 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 41 CONFIDENTIALwww.IDT.com
Haptics Not Only for Mobile Phones. . .
CONFIDENTIALPAGE 42 CONFIDENTIALwww.IDT.com
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
©2009 Integrated Device Technology, Inc.
Low Resolution Touch Screens
A low cost, innovative implementation
CONFIDENTIALPAGE 44 CONFIDENTIALwww.IDT.com
● 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
CONFIDENTIALPAGE 45 CONFIDENTIALwww.IDT.com
● 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
CONFIDENTIALPAGE 46 CONFIDENTIALwww.IDT.com
● 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
©2009 Integrated Device Technology, Inc.
Summary of Value Proposition
CONFIDENTIALPAGE 48 CONFIDENTIALwww.IDT.com
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
CONFIDENTIALPAGE 49 CONFIDENTIALwww.IDT.com
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
©2009 Integrated Device Technology, Inc.
Thank You
谢谢
謝謝ありがとう
Kiitos
Tack
Merci
감사합니다