Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
SMSC CAP1188 81 Revision 1.32 (01-05-12)
DATASHEET
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).
Table 5.64 Breathe Off Delay Settings
BR_OFF_DLY [2:0]
OFF DELAY2 1 0
0 0 0 0 (default)
0 0 1 0.25s
0 1 0 0.5s
0 1 1 0.75s
1 0 0 1.0s
1 0 1 1.25s
1 1 0 1.5s
1 1 1 2.0s
Figure 5.7 Direct Behavior for Non-Inverted Polarity
No rm al –
untouched
operation
R IS E_R A TE
Settin g (t
RIS E
)
(100% - Max D uty
C ycle ) * Brightness
Touc h
De tected
Re lease
De tected
Off D elay
(t
OFF_D L Y
)
FA LL_R AT E
Settin g (t
FALL
)
No rm al –
untouched
operation
(100% - Min Duty Cycle) *
Brightness
LED
Brightness