8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Table 1.1 Pin Description for CAP1088 (continued)
PIN
NUMBER
PIN NAME
PIN FUNCTION
SMDATA - Bi-directional, open-drain SMBus data - requires
pull-up resistor
PIN TYPE
DIOD (5V)
DIO
DIO
DO
DI (5V)
DI (5V)
DI (5V)
OD (5V)
DO
OD (5V)
DO
OD (5V)
DO
OD (5V)
DO
OD (5V)
DO
OD (5V)
DO
OD (5V)
DO
OD (5V)
DO
OD (5V)
OD (5V)
AI
AIO
AIO
AIO
Revision 1.1 (08-05-09)
3
SMDATA /
BC_DATA /
SPI_MSIO /
SPI_MISO
BC_DATA - Bi-directional, open-drain BC-Link data -
requires pull-up resistor
SPI_MSIO - SPI Master-Slave-In-Out bidirectional port
when used in bi-directional mode
SPI_MISO - SPI Master-In-Slave-Out port when used in
normal mode
SMCLK - SMBus clock input - requires pull-up resistor
4
SMCLK /
BC_CLK /
SPI_CLK
BC_CLK - BC-Link clock input
SPI_CLK - SPI clock input
Open drain LED 1 driver (default)
5
LED1
Push-pull LED 1 driver
Open drain LED 2 driver (default)
6
LED2
Push-pull LED 2 driver
Open drain LED 3 driver (default)
7
LED3
Push-pull LED 3 driver
Open drain LED 4 driver (default)
8
LED4
Push-pull LED 4 driver
Open drain LED 5 driver (default)
9
LED5
Push-pull LED 5 driver
Open drain LED 6 driver (default)
10
LED6
Push-pull LED 6 driver
Open drain LED 7 driver (default)
11
LED7
Push-pull LED 7 driver
Open drain LED 8 driver (default)
12
LED8
Push-pull LED 8 driver
ALERT# /
BC_IRQ#
ALERT# - Active low alert / interrupt output for SMBus alert
or SPI interrupt
BC_IRQ# - Active low interrupt / optional for BC-Link
13
14
15
16
17
SMSC CAP1088
ADDR_COMM
CS8
CS7
CS6
Address / communications select pin - pull-down resistor
determines address / communications mechanism
Capacitive Touch Sensor 8
Capacitive Touch Sensor 7
Capacitive Touch Sensor 6
9
DATASHEET
SMSC [ SMSC CORPORATION ]
