CY8C20111_12 Datasheet, PDF (1/44 Pages) Cypress Semiconductor – CapSense® Express™ – One Button and Two Button Capacitive Controllers

CY8C20111, CY8C20121
CapSense^® Express™ – One Button and
Two Button Capacitive Controllers
CapSense® Express™ – One Button and Two Button Capacitive Controllers
Features
■ Capacitive button input tied to a configurable output
❐ Robust sensing algorithm
❐ High sensitivity, low noise
❐ Immunity to RF and AC noise
❐ Low radiated EMC noise
❐ Supports wide range of input capacitance, sensor shapes,
and sizes
■ Target Applications
❐ Printers
❐ Cellular handsets
❐ LCD monitors
❐ Portable DVD players
■ Industry's best configurability
❐ Custom sensor tuning
❐ Output supports strong 20 mA sink current
❐ Output state can be controlled through I²C or directly from
CapSense input state
❐ Run time reconfigurable over I²C
■ Advanced features
❐ Plug-and-play with factory defaults – tuned to support up to
1 mm overlay
❐ Nonvolatile storage of custom settings
❐ Easy integration into existing products – configure output to
match system
❐ No external components required
❐ World class free configuration tool
■ Wide range of operating voltages
❐ 2.45 V to 2.9 V
❐ 3.10 V to 3.6 V
❐ 4.75 V to 5.25 V
■ I²C communication
❐ Supported from 1.8 V
❐ Internal pull-up resistor support option
❐ Data rate up to 400 kbps.
❐ Configurable I²C addressing
■ Industrial temperature range: –40 °C to +85 °C
■ Available in 8-pin SOIC package
Overview
The CapSense^® Express™ controllers support two capacitive
sensing (CapSense) buttons and two general purpose outputs in
CY8C20121 and one CapSense button and one general
purpose output in CY8C20111. The device functionality is
configured through the I²C port and can be stored in on-board
nonvolatile memory for automatic loading at power on. The
digital outputs are controlled from CapSense inputs in factory
default settings, but are user configurable for direct control
through I²C.
The four key blocks that make up the CY8C20111 and
CY8C20121 controllers are: a robust capacitive sensing core
with high immunity against radiated and conductive noise,
control registers with nonvolatile storage, configurable outputs,
and I²C communications. The user can configure registers with
parameters needed to adjust the operation and sensitivity of the
CapSense buttons and outputs and permanently store the
settings. The standard I²C serial communication interface allows
the host to configure the device and read sensor information in
real time. I²C address is fully configurable without any external
hardware strapping.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-53516 Rev. *H
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 31, 2012