Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers

Datasheet

SMSC CAP1188 79 Revision 1.32 (01-05-12)

DATASHEET

5.38 LED Off Delay Register

The LED Off Delay register determines the amount of time that an LED remains at its maximum duty

cycle (or minimum as determined by the polarity controls) before it starts to ramp down. If the LED is

operating in Breathe mode, this delay is applied at the top of each “breath”. If the LED is operating in

the Direct mode, this delay is applied when the LED is unactuated.

Bits 6 - 4 - BR_OFF_DLY[2:0] - Determines the Breathe behavior mode off delay, which is the amount

of time an LED in Breathe behavior mode remains inactive after it finishes a breathe pulse (ramp on

and ramp off), as shown in Figure 5.5 (non-inverted polarity LEDx_POL = 1) and Figure 5.6 (inverted

polarity LEDx_POL = 0). Available settings are shown in Table 5.64.

0 1 0 500ms

0 1 1 750ms

1 0 0 1s

1 0 1 1.25s

1 1 0 1.5s

1 1 1 2s

Table 5.63 LED Off Delay Register

ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

95h R/W

LED Off Delay

- BR_OFF_DLY[2:0] DIR_OFF_DLY[3:0] 00h

Table 5.62 Rise / Fall Rate Decode (continued)

RISE_RATE/ FALL_RATE/ BIT DECODE

RISE / FALL TIME (T

RISE

/ T

FALL

))2 1 0