CAP1214 Datasheet, PDF (1/107 Pages) SMSC Corporation – Multiple Channel Capacitive Touch Sensor and LED Driver

CAP1214
Multiple Channel Capacitive Touch
Sensor and LED Driver
PRODUCT FEATURES
Datasheet
General Description
Features
The CAP1214 is a multiple channel Capacitive Touch
sensor and LED Driver.¹
The CAP1214 contains up to fourteen (14) individual
Capacitive Touch sensor inputs with programmable
„ Fourteen (14) capacitive touch sensor inputs
— Compensates for variable sensing pads
— Programmable sensitivity
— High SNR allows for easy tuning
— Automatic recalibration
sensitivity for use in touch button and slider switch
applications. Each sensor input contains automatic
recalibration with programmable time delays.
— Slider acceleration and position detection
— Proximity detection
„ Lid closure detection
The CAP1214 includes compensation circuitry that
provides uniform touch sensitivity across a wide range
of external sensing pad capacitance.
„ Low power operation
— 4.5uA quiescent current in Deep Sleep
— 250uA quiescent current in Sleep, monitoring 1 button
„ FEEDBACK pin can drive a piezo transducer when a
The CAP1214 also contains eleven (11) low side LED
touch is detected
drivers that offer full-on / off, variable rate blinking, _{„ User controlled reset}
dimness controls, and breathing. LED outputs can be
linked to capacitive sensor channels.
„ Low external component count
„ SMBus 2.0 compliant interface to change operating
Applications
„ Consumer Electronics
parameters to work in a wide variety of systems
— Block Read and Write function for quick tasking
„ Eleven (11) LED driver outputs
„ Desktop and Notebook PCs
— Programmable blink, breathe, and dimness controls
„ LCD Monitors
— 8 configurable as GPIOs
— LEDs can be linked to capacitive sensor channels
1. SMSC and the SMSC logo are registered trademarks and
SMSC RightTouch is a trademark of Standard Microsystems
Corporation ("SMSC").
„ 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
CS1
CS3
CS5
CS7
CS9
CS11
CS13
CS2
CS4
CS6
CS8
CS10
CS12
CS14
SMCLK
SMDATA
ALERT
FEEDBACK
SMSC CAP1214
DATASHEET
Revision 1.0 (08-30-10)