PIC16F1526 datasheet(185/354 Pages) MICROCHIP

185 / 354 page

 2011 Microchip Technology Inc.

Preliminary

DS41458A-page 185

PIC16(L)F1526/27

20.1.4

CCP PRESCALER

There are four prescaler settings specified by the

CCPxM<3:0> bits of the CCPxCON register. Whenever

the CCP module is turned off, or the CCP module is not

in Capture mode, the prescaler counter is cleared. Any

Reset will clear the prescaler counter.

Switching from one capture prescaler to another does not

clear the prescaler and may generate a false interrupt. To

avoid this unexpected operation, turn the module off by

clearing the CCPxCON register before changing the

prescaler. Equation 20-1 demonstrates the code to

perform this function.

EXAMPLE 20-1:

CHANGING BETWEEN

CAPTURE PRESCALERS

20.1.5

CAPTURE DURING SLEEP

Capture mode depends upon the Timer1/3/5 module for

proper operation. There are two options for driving the

Timer1/3/5 module in Capture mode. It can be driven by

the instruction clock (FOSC/4), or by an external clock

source.

When Timer1/3/5 is clocked by FOSC/4, Timer1/3/5 will

not increment during Sleep. When the device wakes from

Sleep, Timer1/3/5 will continue from its previous state.

Capture mode will operate during Sleep when

Timer1/3/5 is clocked by an external clock source.

20.1.6

ALTERNATE PIN LOCATIONS

This module incorporates I/O pins that can be moved to

other locations with the use of the alternate pin function

moved and what their default locations are upon a

Reset, see Section 12.1 “Alternate Pin Function” for

more information.

BANKSEL CCPxCON

;Set Bank bits to point

;to CCPxCON

CLRF

CCPxCON

;Turn CCP module off

MOVLW

NEW_CAPT_PS ;Load the W reg with

;the new prescaler

;move value and CCP ON

MOVWF

CCPxCON

;Load CCPxCON with this

;value

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