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CAP1028 Datasheet(PDF) 9 Page - SMSC Corporation

Part # CAP1028
Description  8 Channel Capacitive Touch Sensor with 2 LED Drivers
PDF  71 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

CAP1028 Datasheet(HTML) 9 Page - SMSC Corporation

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8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
SMSC CAP1028
9
Revision 1.1 (08-05-09)
DATASHEET
The pin types are described in detail below. All pins labeled with (5V) are 5V tolerant.
3
SMDATA /
BC_DATA /
SPI_MSIO /
SPI_MISO
SMDATA - Bi-directional, open-drain SMBus data - requires
pull-up resistor
DIOD (5V)
BC_DATA - Bi-directional, open-drain BC-Link data - requires
pull-up resistor
DIO
SPI_MSIO - SPI Master-Slave-In-Out bidirectional port when
used in bi-directional mode
DIO
SPI_MISO - SPI Master-In-Slave-Out port when used in normal
mode
DO
4
SMCLK /
BC_CLK /
SPI_CLK
SMCLK - SMBus clock input - requires pull-up resistor
DI (5V)
BC_CLK - BC-Link clock input
DI (5V)
SPI_CLK - SPI clock input
DI (5V)
5
N/C
Not Internally Connected
n/a
6LED1
Open drain LED 1 driver (default)
OD (5V)
Push-pull LED 1 driver
DO
7LED2
Open drain LED 2 driver (default)
OD (5V)
Push-pull LED 2 driver
DO
8
N/C
Not Internally Connected
n/a
9
RESET
Active high soft reset for system - resets all registers to default
values. This pin contains an internal 50uA pull-down current.
DI (5V)
10
ALERT# /
BC_IRQ#
ALERT# - Active low alert / interrupt output usable for SMBus
alert or SPI interrupt
OD (5V)
BC_IRQ# - Active low interrupt / optional for BC-Link
OD (5V)
11
ADDR_COMM
Address / communications select pin - pull-down resistor
determines address / communications mechanism
AI
12
CS8
Capacitive Touch Sensor 8
AIO
13
CS7
Capacitive Touch Sensor 7
AIO
14
CS6
Capacitive Touch Sensor 6
AIO
15
CS5
Capacitive Touch Sensor 5
AIO
16
CS4
Capacitive Touch Sensor 4
AIO
17
CS3
Capacitive Touch Sensor 3
AIO
18
CS2
Capacitive Touch Sensor 2
AIO
19
CS1
Capacitive Touch Sensor 1
AIO
20
VDD
Positive Power supply
Power
Bottom Pad
GND
Ground
Power
Table 1.1 Pin Description for CAP1028 (continued)
PIN
NUMBER
PIN NAME
PIN FUNCTION
PIN TYPE



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