Cypress TMA46x vs.
Synaptics S320x
Mobile Phone Applications
The Complete Solution for Advanced Touchscreen
Applications
Owner :FRHW/MELG
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1
Robust Touchscreen Performance is
Paramount
Portable devices require reliable user interface solutions
Necessity for any mobile display device featuring a touch user interface including:
Display panels ranging 1.5 – 5.9 inches
Mobile phones
Digital still cameras and portable media players
Personal navigation devices
Mobile Phones
Touch panel performance requires a robust solution
Charger and display noise cannot degrade touchscreen performance
Functionality needs to remain unchanged in the presence of water
Touch input must register fast and accurately
Low power consumption to support longer battery life
Digital Still Cameras
Your touchscreen system needs robust functionality in any
type of touch-enabled device
Owner :FRHW/MELG
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2
Synaptics S320x Overview
Synaptics S320x is a capacitance sensing IC featuring :
Small finger support down to 4 mm diameter
Point contact passive stylus input with automatic pen/finger disambiguation
Supports gloved finger detection
Up to 250 Hz report rate
Support for screen sizes up to 5.9 in
Synaptics S320x
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Challenges Using Synaptics S320x
1. Noise suppression is required for real-world functionality
Suppressing charger noise is critical to maintaining touch register functionality
Effective noise filtering must target both periodic and broadband noise in order to increase SNR
Synaptics S320X has a 3 V Tx max which leads to lower SNR
Smart Phone
2. Cannot support wet-finger tracking without false touches
Waterproofing is required for functionality in the presence of condensation, sweat, or rain
Synaptics S320x cannot do self + mutual capacitance sensing which is required for true Waterproofing and 1mm stylus support
3. Low performance CPU, less Flash and RAM limits data processing
Host processor requires sufficient processing power to support touch registration and advanced
features simultaneously
Synaptics S320x can’t support high performance advanced features with its underpowered CPU
Requires high performance in
the presence of noise and
water
Have you faced any other challenge?
Owner :FRHW/MELG
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Challenges beyond Performance
What else is important to you?
Ultimate design flexibility
Self + Mutual capacitance provides both robust signal acquisition and position registration of
simultaneous touches
Supports single-layer sensors and multiple stack-up options for flexible and cost-reduced designs
Delivers external display synchronization to neutralize noisy LCD displays
Ease of design and development
OS support for Android and Windows devices
Built-in manufacturing test support
Assisted tuning for simpler, faster design implementation
Faster time to market with easy-to-use development tool
Owner :FRHW/MELG
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5
The Solution You Need
A high performance and cost-effective solution that :
Eliminates charger and display noise to boost SNR
Combines self +mutual capacitance providing both robust signal acquisition and
true waterproofing capabilities
Supports various types of panel designs and thin stack up configurations
Allows for faster design, testing and development times
TMA46x solution is the solution you need:
Provides chargers noise immunity up to 10Vpp; covering majority of aftermarket
chargers that emit noise at 20 times EN specification
Delivers patent-pending waterproofing technology that maintains accuracy and linearity
of touchscreen when moisture is present
Flexibility to design display-integrated touch sensors
End-to-end design and development support using TrueTouch Host Emulator toolkit
20 mW active power consumption – lowest amongst competition
Neutralize External Display Noise
TMA46x silences the competition with breakthrough noise-cancelling solutions
Owner :FRHW/MELG
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6
TMA46x Complete Design Solution
TrueTouch TMA500
Evaluation Kit
TrueTouch Host Emulator
Touch Display Tab
Smartphone by Pantech
Interface Board
Bridge
Touch Panel
Evaluate Gen4 features
and performance using
the TrueTouch Evaluation
Kit..
Owner :FRHW/MELG
Then configure, debug, and
tune your design with TTHE
software…
And validate prototype
testing, early touch panel
development along with
the final test solution…
Cypress Confidential
To create a mobile phone with
unmatched performance in
the presence of noise.
7
Gen4 TMA46x vs. Synaptics S320x
Feature
TMA46x
S320x
High voltage TX
10 V
No
Sensing method
Self + Mutual Capacitance
Mutual Capacitance
Waterproofing
Yes
No
Reversible MUX
Yes
No
CPU Core
ARM M0
16-bit RISC
CPU performance
43 MIPS
8 MIPS
20 mW
36 mW
49-WLCSP
(3.9 x 3.9 x 0.6 mm)
60-BGA
(5.0 x 5.0 x 0.6 mm)
10
10
Power consumption
Smallest package available
# of fingers supported
Owner ::FRHW/MELG
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TMA46x Win over Synaptics S320x
Example – Mobile Handset
TMA46x Value
Block Diagram
Gen4 Touchscreen Solution
ADC
Digital
Sequencer
RX Ch. 0
RX Ch. 1
Communication
I2C/SPI
ARM M0
Cortex 48Mhz CPU
RX Ch. 2
RX Ch. 3
RX Ch. 4
SRAM
RX Ch. 5
RX Ch. 6
RX Ch. 7
Suggested Collateral
Programmable
TX/RX Multiplexer
Communication
Flash
ADC MUX
TMA46x Solution
On-chip 10 V TX boost for higher SNR which enables
thinner display stack ups
Uses self + mutual capacitance sensing for true
waterproofing
10 V TX
Pump
Up to 45 TX/RX Pins (package dependant)
Design Challenges
Noise suppression with thin stack-ups
Robust performance in the presence of water
RX Ch. 8
Kit: CY3290-TMA400EVK
Training: TrueTouch Sales Webcast WW37
Product updates: Gen4 Quick Links
Smart Phone
TMA46x provides superior
noise immunity enabling the
flexibility for thinner display
stack ups
Competition
Synaptics S320x
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