CAP1114 datasheet(80/102 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.1 (02-04-11)

SMSC CAP1114

DATASHEET

6.44.1

LED Polarity 1

Bit 7 - LED8_POL - Determines the polarity of the LED8 output.

‘0’ - The LED8 output is inverted. For example, a setting of ‘1’ in the LED 8 Output register will

cause the LED pin output to be driven to a logic ‘0’.

‘1’ - The LED8 output is non-inverted. For example, a setting of ‘1’ in the LED 8 Output register

will cause the LED pin output to be driven to a logic ‘1’ or left in the high-Z state as determined by

its output type.

Bit 6 - LED7_POL - Determines the polarity of the LED7 output.

Bit 5 - LED6_POL - Determines the polarity of the LED6 output.

Bit 4 - LED5_POL - Determines the polarity of the LED5 output.

Bit 3 - LED4_POL - Determines the polarity of the LED4 output.

Bit 2 - LED3_POL - Determines the polarity of the LED3 output.

Bit 1 - LED2_POL - Determines the polarity of the LED2 output.

Bit 0 - LED1_POL - Determines the polarity of the LED1 output.

6.44.2

LED Polarity 2

Bit 2 - LED11_POL - Determines the polarity of the LED11 output.

Bit 1 - LED10_POL - Determines the polarity of the LED10 output.

Bit 0 - LED9_POL - Determines the polarity of the LED9 output.

Table 6.64 LED Polarity Behavior

LED

OUTPUT

CONTROL

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. Brightness 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 breathing,

max brightness is 100 minus

min duty cycle. Brightness

ramps from 100 - min duty

cycle to 100 - max duty cycle.

according to

LED behavior

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