PIC16F722-ESLASHML datasheet(135/302 Pages) MICROCHIP

135 / 302 page

DS41341E-page 135

PIC16F72X/PIC16LF72X

15.0

CAPTURE/COMPARE/PWM

(CCP) MODULE

The Capture/Compare/PWM module is a peripheral

which allows the user to time and control different

events. In Capture mode, the peripheral allows the

timing of the duration of an event. The Compare mode

allows the user to trigger an external event when a

predetermined amount of time has expired. The PWM

mode can generate a Pulse-Width Modulated signal of

varying frequency and duty cycle.

The timer resources used by the module are shown in

Table 15-1.

Additional information on CCP modules is available in

the Application Note AN594, “Using the CCP Modules”

(DS00594).

TABLE 15-1:

CCP MODE – TIMER

RESOURCES REQUIRED

TABLE 15-2:

INTERACTION OF TWO CCP MODULES

CCP Mode

Timer Resource

Capture

Timer1

Compare

Timer1

PWM

Timer2

CCP1 Mode

CCP2 Mode

Interaction

Capture

Same TMR1 time base

Capture

Compare

Same TMR1 time base(1, 2)

Compare

Same TMR1 time base(1, 2)

PWM

The PWMs will have the same frequency and update rate (TMR2 interrupt).

The rising edges will be aligned.

PWM

Capture

None

PWM

Compare

None

Note 1:

If CCP2 is configured as a Special Event Trigger, CCP1 will clear Timer1, affecting the value captured on

the CCP2 pin.

If CCP1 is in Capture mode and CCP2 is configured as a Special Event Trigger, CCP2 will clear Timer1,

affecting the value captured on the CCP1 pin.

Note:

CCPRx

and

CCPx

throughout

this

document refer to CCPR1 or CCPR2 and

CCP1 or CCP2, respectively.

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