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
18
19
20
21
22
23
CS5
CS4
CS3
CS2
CS1
VDD
Capacitive Touch Sensor 5
Capacitive Touch Sensor 4
Capacitive Touch Sensor 3
Capacitive Touch Sensor 2
Capacitive Touch Sensor 1
Positive Power supply
AIO
AIO
AIO
AIO
AIO
Power
Active high soft reset for system - resets all registers to
default values. This pin contains an internal 50uA pull-down
current.
24
RESET
GND
DI (5V)
Power
Bottom Pad
Ground
The pin types are described in detail below. All pins labeled with (5V) are 5V tolerant.
APPLICATION NOTE: For the 5V tolerant pins that have a pull-up resistor, the pull-up voltage must not exceed 3.6V
when the CAP1088 is unpowered.
APPLICATION NOTE: The SPI_CS# pin should be grounded when SMBus, I2C, or BC-Link communications are
used.
Table 1.2 Pin Types
PIN TYPE
DESCRIPTION
Power
This pin is used to supply power or ground to the
device.
DI
Digital Input - This pin is used as a digital input. This
pin is 5V tolerant.
AIO
Analog Input / Output -This pin is used as an I/O for
analog signals.
DIOD
Digital Input / Open Drain Output- This pin is used as a
digital I/O. When it is used as an output, it is open drain
and requires a pull-up resistor. This pin is 5V tolerant.
OD
Open Drain Digital Output - this pin is used as a digital
output. It is open drain and requires a pull-up resistor.
This pin is 5V tolerant.
DO
Push-pull Digital Output - This pin is used as a digital
output and can sink and source current.
DIO
Push-pull Digital Input / Output - This pin is used as an
I/O for digital signals.
Revision 1.1 (08-05-09)
SMSC CAP1088
DATA1S0HEET
SMSC [ SMSC CORPORATION ]
