Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
generated after the slide has finished. These extra interrupts are generated every round robin cycle
(~35ms) and the number is determined by the speed of the slide.
2. For a tap event there are no further interrupts. See Figure 4.4.
3. For a press and hold event, interrupts are generated based on the programmed repeat rate. If the
repeat rate is disabled, then no further interrupts are generated. See Figure 4.5.
4.6.3
Wake from Deep Sleep
This pin is also used to wake the device from the Deep Sleep power state if it is driven high from an
external source. When the device enters the Deep Sleep power state, the ALERT pin output is put into
a High Z mode. It requires a pull-down resistor to pull it to the inactive state. Furthermore, the
CAP1014 will wait 5ms before it samples the ALERT pin for wake activity.
Polling Cycle
(35ms)
Interrupt on
Touch
Button Repeat Rate
(175ms)
Button Repeat Rate
(175ms)
Button Repeat Rate
(175ms)
Touch Detected
Interrupt on
Release
ALERT Pin /
INT bit
Button Status
SMBus Write to
INT bit
Figure 4.2 Button Interrupt Behavior - Repeat Rate Enabled (default)
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 Button Interrupt Behavior - No Repeat Rate Enabled
SMSC CAP1014
Revision 1.65 (08-11-09)
DATA2S5HEET
SMSC [ SMSC CORPORATION ]
