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