Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
SMSC CAP1188 43 Revision 1.32 (01-05-12)
DATASHEET
Bit 2 - MULT - Indicates that the device is blocking detected touches due to the Multiple Touch
detection circuitry (see Section 5.14). This bit will not cause the INT bit to be set and hence will not
cause an interrupt.
Bit 1 - MTP - Indicates that the device has detected a number of sensor inputs that exceed the MTP
threshold either via the pattern recognition or via the number of sensor inputs (see Section 5.15). This
bit will cause the INT bit to be set if the MTP_ALERT bit is also set. This bit will not be cleared until
the condition that caused it to be set has been removed.
Bit 0 - TOUCH - Indicates that a touch was detected. This bit is set if any bit in the Sensor Input Status
register is set.
5.2.2 Sensor Input Status - 03h
The Sensor Input Status Register stores status bits that indicate a touch has been detected. A value
of ‘0’ in any bit indicates that no touch has been detected. A value of ‘1’ in any bit indicates that a
touch has been detected.
All bits are cleared when the INT bit is cleared and if a touch on the respective capacitive touch sensor
input is no longer present. If a touch is still detected, the bits will not be cleared (but this will not cause
the interrupt to be asserted - see Section 5.6).
Bit 7 - CS8 - Indicates that a touch was detected on Sensor Input 8. This sensor input can be linked
to LED8.
Bit 6 - CS7 - Indicates that a touch was detected on Sensor Input 7. This sensor input can be linked
to LED7.
Bit 5 - CS6 - Indicates that a touch was detected on Sensor Input 6. This sensor input can be linked
to LED6.
Bit 4 - CS5 - Indicates that a touch was detected on Sensor Input 5. This sensor input can be linked
to LED5.
Bit 3 - CS4 - Indicates that a touch was detected on Sensor Input 4. This sensor input can be linked
to LED4.
Bit 2 - CS3 - Indicates that a touch was detected on Sensor Input 3. This sensor input can be linked
to LED3.
Bit 1 - CS2 - Indicates that a touch was detected on Sensor Input 2. This sensor input can be linked
to LED2.
Bit 0 - CS1 - Indicates that a touch was detected on Sensor Input 1. This sensor input can be linked
to LED1.
5.2.3 LED Status - 04h
The LED Status Registers indicate when an LED has completed its configured behavior (see Section
5.31, "LED Behavior Registers") after being actuated by the host (see Section 5.28, "LED Output
Control Register"). These bits are ignored when the LED is linked to a capacitive sensor input. All LED
Status bits are cleared when the INT bit is cleared.
Bit 7 - LED8_DN - Indicates that LED8 has finished its behavior after being actuated by the host.
Bit 6 - LED7_DN - Indicates that LED7 has finished its behavior after being actuated by the host.
Bit 5 - LED6_DN - Indicates that LED6 has finished its behavior after being actuated by the host.
Bit 4 - LED5_DN - Indicates that LED5 has finished its behavior after being actuated by the host.
Bit 3 - LED4_DN - Indicates that LED4 has finished its behavior after being actuated by the host.