CAP1126 datasheet(50/73 Pages) MICROCHIP

50 / 73 page

CAP1126

DS00001623B-page 50

 2015 Microchip Technology Inc.

6.28

LED Output Control Register

The LED Output Control Register controls the output state of the LED pins that are not linked to sensor inputs.

The LED Polarity Control Register will determine the non actuated state of the LED pins. The actuated LED behavior is

determined by the LED behavior controls (see Section 6.31, "LED Behavior Register").

Table 6-48 shows the interaction between the polarity controls, output controls, and relative brightness.

Bit 1 - LED2_DR - Determines whether LED2 output is driven high or low.

• ‘0’ (default) - The LED2 output is driven at the minimum duty cycle or not actuated.

• ‘1’ - The LED2 output is High Z or driven at the maximum duty cycle or actuated.

Bit 0 - LED1_DR - Determines whether LED1 output is driven high or low.

TABLE 6-47:

LED OUTPUT CONTROL REGISTER

ADDR

R/W

Default

74h

R/W

LED Output

Control

---

LED2_

LED1_

00h

Note:

If an LED is linked to a sensor input in the Sensor Input LED Linking Register (Section 6.26, "Sensor Input

LED Linking Register"), the corresponding bit in the LED Output Control Register is ignored (i.e. a linked

LED cannot be host controlled).

TABLE 6-48:

LED POLARITY BEHAVIOR

LED Output

Control

Touch

Polarity

Max Duty

Min Duty

Brightness

LED Appearance

inverted (‘0’)

not used

minimum % of time

that the LED is on

(logic 0)

maximum brightness at

min duty cycle

on at min duty

cycle

inverted (‘0’)

maximum % of time

that the LED is on

(logic 0)

minimum % of time

that the LED is on

(logic 0)

maximum brightness at

max duty cycle. Bright-

ness ramps from min

duty cycle to max duty

cycle

according to LED

behavior

non-inverted

(‘1’)

not used

minimum % of time

that the LED is off

(logic 1)

maximum brightness at

100 minus min duty

cycle.

on at 100 - min

duty cycle

non-inverted

(‘1’)

maximum % of time

that the LED is off

(logic 1)

minimum % of time

that the LED is off

(logic 1)

For Direct behavior,

maximum brightness is

100 minus max duty

cycle. When breath-

ing, max brightness is

100 minus min duty

cycle. Brightness

ramps from 100 - min

duty cycle to 100 - max

duty cycle.

according to LED

behavior

CAP1126 Datasheet(PDF) 50 Page - Microchip Technology

CAP1126 Datasheet(HTML) 50 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73

Datasheet Download

Link URL