Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
SMSC CAP1188 9 Revision 1.32 (01-05-12)
DATASHEET
Chapter 1 Pin Description
Figure 1.1 CAP1188 Pin Diagram (24-Pin QFN)
Table 1.1 Pin Description for CAP1188
PIN # PIN NAME PIN FUNCTION PIN TYPE
UNUSED
CONNECTION
1 SPI_CS# Active low chip-select for SPI bus DI (5V)
Connect to
Ground
2
WAKE /
SPI_MOSI
WAKE - Active high wake / interrupt output -
Standby power state - requires pull-down resistor
DO
Pull-down
Resistor
WAKE - Active high wake input Deep Sleep power
state - requires pull-down resistor
DI
SPI_MOSI - SPI Master-Out-Slave-In port when
used in normal mode
DI (5V)
Connect to
Ground
1
2
3
4
18
17
16
15
24 23 22 21
7 8 9
10
SMCLK / BC_CLK / SPI_CLK
LED6
WAKE / SPI_MOSI
RESET
LED1
LED2
LED3
SMDATA / BC_DATA / SPI_MSIO /
SPI_MISO
CS8
LED5 LED4
CS7
ADDR_COMM5
11
14
20
VDD CS1 CS2
CS6
ALERT# / BC_IRQ#
CS3
SPI_CS#
CAP1188
24 pin QFN
GND
6
12 19
13
LED8 LED7
CS5
CS4