8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
LED Actuated
LED Unactuated
Breathe Max Duty Cycle * Brightness
LED
Brightness
Breathe Min Duty Cycle * Brightness
Breathe
Period
Breathe Off
Delay
(BR_PER)
(BR_OFF_DLY)
Figure 5.6 Breathe Behavior with Inverted Polarity
Table 5.64 Breathe Off Delay Settings
BR_OFF_DLY [2:0]
2
1
0
OFF DELAY
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0 (default)
0.25s
0.5s
0.75s
1.0s
1.25s
1.5s
2.0s
Bits 3 - 0 - DIR_OFF_DLY[3:0] - Determines the turn-off delay, as shown in Table 5.65, for all LEDs
that are configured to operate in Direct behavior mode.
The Direct behavior operation is determined by the combination of programmed Rise Time, Fall Time,
Min and Max Duty cycles, Off Delay, and polarity. Figure 5.7 shows the behavior for non-inverted
polarity (LEDx_POL = 1) while Figure 5.8 shows the behavior for inverted polarity (LEDx_POL = 0).
Revision 1.32 (01-05-12)
SMSC CAP1128
DATA7S8HEET
SMSC [ SMSC CORPORATION ]
