6 Channel Capacitive Touch Sensor with 6 LED Drivers
Datasheet
the minimum press timer expires, then it is flagged as a touch and an interrupt is generated upon the
release. If the sensor detects a touch for longer than this timer value, then it is flagged as a “press
and hold” event. So long as the touch is held, interrupts will be generated at the programmed repeat
rate and upon a release.
Polling Cycle
(35ms)
Interrupt on
Touch
Interrupt on
Release
Button Repeat Rate
(175ms)
Button Repeat Rate
(175ms)
Button Repeat Rate
(175ms)
Touch Detected
ALERT Pin / INT bit
Button Status
SMBus Write to INT bit
Figure 4.2 Sensor Interrupt Behavior - Repeat Rate Enabled
APPLICATION NOTE: The host may need to poll the device twice to determine that a release has been detected.
Polling Cycle
(35ms)
Interrupt on
Touch
Interrupt on
Release
Touch Detected
ALERT Pin /
INT bit
Button Status
SMBus Write to
INT bit
Figure 4.3 Sensor Interrupt Behavior - No Repeat Rate Enabled
SMSC CAP1066
Revision 1.1 (08-05-09)
DATA3S1HEET
SMSC [ SMSC CORPORATION ]
