Capacitive sensing is fast becoming the solution of choice for front-panel display and media control applications. The CapSense solutions offers system designers numerous advantages by being a self-contained system— increasing flexibility, reducing board space and lowering cost.

1. ADVANTAGES
Up to 46 Capacitive/General-purpose
I/O
• LED Driver/Backlight Control
• Motor Control
•Power Management
• I/O Expansion
• Gyro
• Accelerometer
• Ambient Light-sensing
2.4V–5.25V Supply Voltage
512B–1KB RAM
8KB–16KB Flash
In-system Serial Programming (ISSP)
Free Development Software
(PSoC Designer™
)
Full-featured In-circuit Emulator
and Programmer
I2
C, SPI, UART and USB Communication
Interfaces
Industry’s Smallest Packages
(e.g. 16-pin 3x3x0.6mm QFN)
Capacitive sensing made easy — POWERED BY PSoC®
MIXED-SIGNAL
ARRAY TeCHNOLOGY
Capacitive sensing is fast becoming the solution of choice for front-panel display and
media control applications. Best-in-class durability, decreased bill of materials (BOM),
and a clean appearance make this elegant interface attractive to a wide range of
designs. Cypress’s CapSense solution offers system designers numerous advantages
over traditional capacitive sensing products by being a self-contained system—
increasing flexibility, reducing board space, and lowering cost.
MCU
CapSense
CIRCUIT
ANALOG/DIGITAL
GPIO
COMMUNICATION
CapSenseINPUTS
ADDITIONAL
FUNCTIONS
HOST
+
–
Because of the unique PSoC®
architecture, designers can easily integrate multiple functions
(e.g. LED drivers and backlighting), in addition to capacitive sensing. The PSoC CapSense
solution also delivers benefits such as easy communications using either I2
C, SPI, UART,
or USB interfaces, the ability to implement buttons, sliders, touchpads, touchscreens, and
proximity sensors with the same device, and the ability to make quick design changes
using the flash-based PSoC architecture.
Product Overview
cypress.com
cypress
capsense
™
capacitive
touch-sensing Controller
APPLICATIONS
• Wireless Handsets • Digital Still & Video Cameras • Appliances • Handheld Devices (PDAs)
• Notebook Computers • LCD Monitors • PC Keyboards & Mice • Automotive
• Industrial Interfaces • Toys
PSoC®
Mixed-Sigal Array
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2. PART
NUMBER
GPIO CAPACITIVE
I/O
ANALOG
BLOCKS
DIGITAL
BLOCKS
FLASH RAM TEMPERATURE
GRADE
H/W COMM
INTERFACE
DEVELOPMENT KITS
CY8C24x94 Up to 56 Up to 46 6 4 16K 1K Industrial I2
C USB, SPI, UART CY3214-PSoCEvalUSB
CY8C21x34 Up to 28 Up to 24 4 Type “E” 4 8K 512
Automotive
Industrial, Extended
I2
C SPI, UART CY3280-BK1
CY8C20x34 Up to 28 Up to 25 CapSense 0 8K 512 Industrial I2
C, SPI CY3280-BK1
Capsense device selector guide
INTERFACE TYPE OVERVIEW APPLICATIONS
• Low-cost, simple solution for integrating up to 46 buttons
• Flexible technology enables sensing through a wide range of protective
overlay materials
• Calibrate buttons individually with firmware parameters
Wireless Handsets,
PC Peripherals, Appliances,
LCD Monitors, TVs, PC Mice,
Notebook Computers,
Automotive, and Toys
• PSoC CapSense implements sliders in applications requiring precise multi-level sensing
Volume control
Brightness control
Temperature control
• Achieve greater resolution than is native to IC pin count
Wireless Handsets,
PC Peripherals, Appliances,
LCD Monitors, TVs, Notebook
Computers, Digital Still
Cameras, Automotive, and
Exercise Equipment
• PSoC’s unique architecture allows the integration of a touchpad into
non-traditional touchpad applications
• Capacitive sensing offers a cost-reduction to expensive modules and resistive-
overlay technologies
• Cypress’s automated design methodology makes touchpad implementation easy,
even for the most novice designer
Wireless Handsets, Notebook
Computers, and Keyboards
• PSoC’s unique architecture allows the integration of a touchscreen into
non-traditional touchscreen applications
• Configurable I/O allows for the support of a wide range of panel sizes
• Multi-touch capable
Wireless Handsets, Appliances,
Handheld Devices (PDAs), Kiosks,
and PQS Terminals
• Wake your system before the user’s hand reaches the touch surface
• Proximity sensing can be applied to any application that senses a conductive object,
such as fluid-level sensors and pulse-rate monitors
• PSoC CapSense implements proximity sensing simply by adjusting the sensor design
and sensitivity of the capacitance measurement
Appliances, Keyboards, PC Mice,
Touchpads, Notebook Computers,
Automotive, Lighting Sensors,
Industrial Sensors, and Controls
BUTTONS
SLIDERS
TOUCHPADS
TOUCHSCREENS
PROXIMITY SENSING
product overview
Cypress, the Cypress logo and PSoC are registered trademarks and CapSense Express, Programmable System-on-Chip and PSoC Designer are trademarks
of Cypress Semiconductor Corporation. The names for any other companies, products, or services mentioned herein are for identification only and may be
trademarks, registered trademarks, or service marks of or may be copyrighted by their respective holders. Cypress Semiconductor Corporation assumes no
responsibility for customer product design and assumes no responsibility for infringement of patents or rights of others that may result from Cypress assistance,
and no product licenses are implied. 2-0408CapSensePO 042008/SXF/VYM/VYM/GDA/JP/5k. © 2008 Cypress Semiconductor Corporation
Cypress Semiconductor Corporation
198 Champion Court, San Jose CA 95134
phone +1 408.943.2600 fax +1 408.943.6848
toll free +1 800.858.1810 (U.S. only) Press “1” to reach your local sales representative
Get started now.
Go to cypress.com/go/CapSense to get more information on CapSense, download software and order kits.
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