Overview
These CapSense Express™ controllers support four to ten capacitive sensing (CapSense) buttons. The device functionality is configured through an I2C port and can be stored in onboard nonvolatile memory for automatic loading at power-on. The CY8C20110 is optimized for dimming LEDs in 15 selectable duty cycles for back light applications. The device can be configured to have up to 10 GPIOs connected to the PWM output. The PWM duty cycle is programmable for variable LED intensities.
Features
■10/8/6/4 capacitive button input
❐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
■Low operating current
❐Active current: continuous sensor scan: 1.5 mA
❐Deep sleep current: 4 µA
■Industry's best configurability
❐Custom sensor tuning, one optional capacitor
❐Output supports strong drive for LED
❐Output state can be controlled through I2C or directly from CapSense® input state
❐Run time reconfigurable over I2C
■Advanced features
❐All GPIOs support LED dimming with configurable delay option in CY8C20110
❐Interrupt outputs
❐User defined inputs
❐Wake on interrupt input
❐Sleep control pin
❐Nonvolatile storage ofcustom 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
❐2.4 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 16-pin QFN, 8-pin, and 16-pin SOIC packages
