Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
SMSC CAP1188 11 Revision 1.32 (01-05-12)
DATASHEET
APPLICATION NOTE: When the ALERT# pin is configured as an active low output, it will be open drain. When it
is configured as an active high output, it will be push-pull.
11 LED7
Open drain LED 7 driver (default) OD (5V)
Connect to
Ground
Push-pull LED 7 driver DO
leave open or
connect to
Ground
12 LED8
Open drain LED 8 driver (default) OD (5V)
Connect to
Ground
Push-pull LED 8 driver DO
leave open or
connect to
Ground
13
ALERT# /
BC_IRQ#
ALERT# - Active low alert / interrupt output for
SMBus alert or SPI interrupt - requires pull-up
resistor (default)
OD (5V)
Connect to
Ground
ALERT - Active high push-pull alert / interrupt
output for SMBus alert or SPI interrupt
DO leave open
BC_IRQ# - Active low interrupt / optional for BC-
Link - requires pull-up resistor
OD (5V)
Connect to
Ground
BC_IRQ - Active high push-pull interrupt / optional
for BC-Link
DO leave open
14 ADDR_COMM
Address / communications select pin - pull-down
resistor determines address / communications
mechanism
AI n/a
15 CS8 Capacitive Touch Sensor Input 8 AIO
Connect to
Ground
16 CS7 Capacitive Touch Sensor Input 7 AIO Connect to GND
17 CS6 Capacitive Touch Sensor Input 6 AIO Connect to GND
18 CS5 Capacitive Touch Sensor Input 5 AIO Connect to GND
19 CS4 Capacitive Touch Sensor Input 4 AIO Connect to GND
20 CS3 Capacitive Touch Sensor Input 3 AIO Connect to GND
21 CS2 Capacitive Touch Sensor Input 2 AIO Connect to GND
22 CS1 Capacitive Touch Sensor Input 1 AIO Connect to GND
23 VDD Positive Power supply Power n/a
24 RESET
Active high soft reset for system - resets all
registers to default values.
DI (5V) Connect to GND
Bottom
Pad
GND Ground Power n/a
Table 1.1 Pin Description for CAP1188 (continued)
PIN # PIN NAME PIN FUNCTION PIN TYPE
UNUSED
CONNECTION