PIC12F1822-ISLASHMF datasheet(312/398 Pages) MICROCHIP

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PIC12F/LF1822/16F/LF1823

DS41413A-page 312

Preliminary

 2010 Microchip Technology Inc.

26.7.3

FREQUENCY THRESHOLD

The frequency threshold should be placed midway

between the value of nominal frequency and the

reduced frequency of the capacitive sensing oscillator.

Refer to Application Note AN1103, “Software Handling

for Capacitive Sensing” (DS01103) for more detailed

information on the software required for capacitive

sensing module.

26.8

Operation during Sleep

The capacitive sensing oscillator will continue to run as

long as the module is enabled, independent of the part

being in Sleep. In order for the software to determine if

a frequency change has occurred, the part must be

awake. However, the part does not have to be awake

when the timer resource is acquiring counts.

Note:

For more information on general capacitive

sensing refer to Application Notes:

• AN1101, “Introduction to Capacitive

Sensing” (DS01101)

• AN1102, “Layout and Physical Design

Guidelines for Capacitive Sensing”

(DS01102)

Note:

Timer0 does not operate when in Sleep,

and therefore, cannot be used for

capacitive sense measurements in Sleep.

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