8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
Chapter 1 Pin Description
SPI_CS#
1
2
3
4
5
15
14
13
12
11
CS5
WAKE / SPI_MOSI
CS6
CAP1128
20 pin QFN
SMDAT / BC_DATA / SPI_MSIO /
SPI_MISO
CS7
SMCLK / BC_CLK / SPI_CLK
N/C*
CS8
ADDR_COMM
GND
*N/C pins must be connected to ground
Figure 1.1 CAP1128 Pin Diagram (20-Pin QFN)
Table 1.1 Pin Description for CAP1128
PIN
NUMBER
UNUSED
CONNECTION
PIN NAME
PIN FUNCTION
PIN TYPE
Connect to
Ground
1
SPI_CS#
Active low chip-select for SPI bus
DI (5V)
WAKE - Active high wake / interrupt output
Standby power state - requires pull-down resistor
DO
DI
Pull-down
Resistor
WAKE - Active high wake input - requires pull-down
WAKE /
SPI_MOSI
2
resistor
Deep Sleep power state
SPI_MOSI - SPI Master-Out-Slave-In port when used in
normal mode
Connect to
Ground
DI (5V)
Revision 1.32 (01-05-12)
SMSC CAP1128
DATA1S0HEET
SMSC [ SMSC CORPORATION ]
