CAP1114 Datasheet, PDF (1/102 Pages) SMSC Corporation – Multiple Channel Capacitive Touch Sensor and LED Driver

CAP1114
Multiple Channel Capacitive
Touch Sensor and LED Driver
PRODUCT FEATURES
Datasheet
General Description
The CAP1114, which incorporates SMSC’s
RightTouch^TM1 technology, is a multiple channel
Capacitive Touch sensor and LED Driver.
The CAP1114 contains up to fourteen (14) individual
Capacitive Touch sensor inputs with programmable
sensitivity for use in touch button and slider switch
applications. Each sensor also contains automatic
recalibration with programmable time delays.
The CAP1114 also includes internal circuitry to
compensate for design and parasitic variance in un-
touched capacitance on sensors.
The CAP1114 also contains eleven (11) low side LED
drivers that offer full-on / off, variable rate blinking,
dimness controls, and breathing. Capacitive buttons can
be linked to LED outputs.
Applications
„ Consumer Electronics
„ Desktop and Notebook PCs
„ LCD Monitors
1. SMSC and the SMSC logo are registered trademarks and SMSC
RightTouch and the RightTouch logo are trademarks of Standard
Microsystems Corporation (“SMSC”).
Features
„ Fourteen (14) capacitive touch sensor inputs
— Compensates for variable sensor capacitance
— Programmable sensitivity
— High SNR allows for easy tuning
— Automatic recalibration
— Slider acceleration detection
— Slider positional detection
— Proximity detection
„ Lid closure detection
„ Low power operation
— 4.5uA quiescent current in Deep Sleep
— 200uA quiescent current in Sleep while monitoring 1
button
„ Alert to signal touch to host processor
„ User controlled reset
„ Low external component count
„ SMBus 2.0 compliant interface to change operating
parameters to work in a wide variety of systems
— Block Read and Write function for quick tasking
„ Eleven (11) LED driver outputs
— Programmable blink, breathe, and dimness controls
— 8 configurable as GPIOs
— Buttons can be linked to LED responses
„ Development boards and software available
„ Available in 32-pin 5mm x 5mm QFN Lead-free
RoHS Compliant package
Block Diagram
LED2
LED4
LED6
LED8 LED10
LED1
LED3
LED5
LED7
LED9 LED11
RESET
VDD GND
LED Blink, Breathe, and Dimness control
Capacitive Sensing Algorithm
SMBus
Slave
Protocol
SMCLK
SMDATA
ALERT
CS1
CS3
CS5
CS7
CS9
CS11
CS13
CS2
CS4
CS6
CS8
CS10
CS12
CS14
SMSC CAP1114
DATASHEET
Revision 1.1 (02-04-11)