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| 型號： | CAP1028-1-BP-TR |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC20 |
| 封裝： | 4 X 4 MM, ROHS COMPLAINT, QFN-20 |
| 文件頁數(shù)： | 1/69頁 |
| 文件大?。?/td> | 948K |
| 代理商： | CAP1028-1-BP-TR |
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SMSC CAP1028
DATASHEET
Revision 1.0 (06-16-09)
Datasheet
PRODUCT FEATURES
CAP1028
8 Channel Capacitive
Touch Sensor with 2
LED Drivers
General Description
The CAP1028 is a multiple channel Capacitive Touch
sensor with multiple power LED drivers. It contains eight
(8) individual Capacitive Touch sensor inputs with
programmable sensitivity for use in touch sensor
applications. Each sensor automatically recalibrates to
compensate for gradual environmental changes.
The CAP1028 also contains two (2) LED drivers that
offer full-on / off, variable rate blinking, dimness controls,
and breathing. Each of the LED drivers may be linked to
one of the sensors to be actuated when a touch is
detected. As well, each LED driver may be individually
controlled via a host controller.
The CAP1028 offers multiple power states operating at
low quiescent currents.
During the Standby mode of operation, one or more
Capacitive Touch Sensors are active and all LEDs may
be used. If a touch is detected, then it will wake the
system using the WAKE/SPI_MOSI pin.
The Deep Sleep mode of operation is the lowest power
state available drawing 5 uA of current. During this
mode, no sensors are active though all LEDs may be
use d. Drivin g the WAKE/SPI_MOSI pin or
communications will wake the device.
Applications
Desktop and Notebook PC’s
LCD Monitors
Printers
Appliances
Features
Eight (8) Capacitive Touch Sensor Inputs
—
Programmable sensitivity
—
Automatic recalibration
—
Individual thresholds for each button
Flexible Capacitive Touch Sense algorithm
Multiple Communication interfaces
—SMBus / I2C compliant interface
—
SMSC BC-Link interface
—
SPI communications
—
Pin selectable communications protocol and multiple
slave addresses (SMBus / I2C only)
Low Power operation
—
5 uA quiescent current in Deep Sleep
—
Samples one or more channels in Standby
Two (2) LED Driver Outputs
—
Open Drain or Push-Pull
—
Programmable blink, breathe, and dimness controls
—
Can be linked to Capacitive Touch Sensors
Dedicated Wake output flags touches in low power
mode
System RESET pin
Available in 20-pin 4mm x 4mm RoHS compliant
QFN package
Block Diagram
Note: I2C is a trademark of NXP semiconductor. BC-Link is a trademark of SMSC.
SMBus
/ BC-
Link /
SPI
Slave
Protocol
SMCLK/ BC_CLK /
SPI_CLK
SMDATA / BC_DATA/
SPI_MSIO / SPI_MISO
VDD GND
ALERT# / BC_IRQ#
Capacitive Sensing Algorithm
LED1
CS1 CS2
CS3 CS4 CS5 CS6
LED Driver, Breathe,
and Dimness control
WAKE / SPI_MOSI
CS7 CS8
RESET
ADDR_COMM
SPI_CS#
LED2
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