PIC16F916ESLASHP301 datasheet(179/272 Pages) MICROCHIP

179 / 272 page

Preliminary

DS41250E-page 177

PIC16F917/916/914/913

15.0

CAPTURE/COMPARE/PWM

MODULES

Each Capture/Compare/PWM (CCP) module contains

a 16-bit register which can operate as a:

• 16-bit Capture register

• 16-bit Compare register

• PWM Master/Slave Duty Cycle register

Both the CCP1 and CCP2 modules are identical in

operation, with the exception being the operation of the

special event trigger. Table 15-1 and Table 15-2 show

the resources and interactions of the CCP module(s).

In the following sections, the operation of a CCP

module is described with respect to CCP1. CCP2

operates the same as CCP1, except where noted.

CCP1 Module:

Capture/Compare/PWM Register1 (CCPR1) is com-

prised of two 8-bit registers: CCPR1L (low byte) and

CCPR1H (high byte). The CCP1CON register controls

the operation of CCP1. The special event trigger is

generated by a compare match and will reset Timer1.

CCP2 Module:

Capture/Compare/PWM Register2 (CCPR2) is com-

prised of two 8-bit registers: CCPR2L (low byte) and

CCPR2H (high byte). The CCP2CON register controls

the operation of CCP2. The special event trigger is

generated by a compare match and will reset Timer1

and start an A/D conversion (if the A/D module is

enabled).

Additional information on CCP modules is available in

the “PICmicro® Mid-Range MCU Family Reference

Manual” (DS33023) and in 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

CCPx Mode CCPy Mode

Interaction

Capture

Same TMR1 time base

Capture

Compare

The compare should be configured for the special event trigger, which clears TMR1

Compare

The compare(s) should be configured for the special event trigger, which clears TMR1

PWM

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

PWM

Capture

None

PWM

Compare

None

PIC16F916E/P301 Datasheet(PDF) 179 Page - Microchip Technology

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