CAP1014 datasheet(72/84 Pages) SMSC

72 / 84 page

Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.65 (08-11-09)

SMSC CAP1014

DATASHEET

5.43

LED Breathe Period Register

The LED Breathe Period register determines the overall period of a breathe operation as determined

by the LED_CTL registers (see Table 5.59 - setting 11b). Each LSB represents 32ms so that a setting

of 14h (20d) would represent a period of 640ms. The total range is from 32ms to 4.06 seconds (see

Table 5.61).

5.44

LED Pulse Configuration Register

The LED Pulse Configuration register controls the number of pulses that are sent for the Pulse 1 and

Pulse 2 LED output behaviors.

Bits 5 - 3 - PULSE2_CNT[2:0] - Determines the number of pulses used for the Pulse 2 behavior as

shown in Table 5.65. The default is 100b.

Bits 2 - 0 - PULSE1_CNT[2:0] - Determines the number of pulses used for the Pulse 1 behavior as

shown in Table 5.65.

Figure 5.4 Pulse 2 Behavior with Inverted Polarity

Table 5.63 LED Behavior Registers

ADDR

R/W

B6B5B4B3B2

DEFAULT

86h

R/W

LED Breathe

Period

BR_

PER6

BR_

PER5

BR_

PER4

BR_

PER3

BR_

PER2

BR_

PER1

BR_

PER0

5Dh

Table 5.64 LED Configuration Registers

ADDR

R/W

DEFAULT

88h

R/W

LED Pulse Config

PULSE2_CNT[2:0]

PULSE1_CNT[2:0]

24h

Normal –

untouched

operation

Normal –

untouched

operation

Touch Detected

Pulse 2 Max Duty Cycle * Brightness

Pulse 2 Min Duty Cycle * Brightness

5 additional pulses after release

Release Detected

Breathe

and Pulse

Period

(P2_PER)

LED

Brightness

. . .

CAP1014 Datasheet(PDF) 72 Page - SMSC Corporation

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