CY8C20111 查看數據表（PDF） - Cypress Semiconductor

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CY8C20111

CapSense® Express™ – One Button and Two Button Capacitive Controllers

Cypress Semiconductor 

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

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