PIC16C73B-20/SS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C73B-20/SS

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C63A/65B/73B/74B

9.0 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 9-1 and Table 9-2 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 “Using the CCP Modules”

(AN594).

TABLE 9-1: CCP MODE - TIMER

RESOURCES REQUIRED

CCP Mode

Timer Resource

Capture

Compare

PWM

Timer1

Timer1

Timer2

TABLE 9-2: INTERACTION OF TWO CCP MODULES

CCPx Mode CCPy Mode

Interaction

Capture

Capture

Compare

PWM

PWM

PWM

Capture

Compare

Compare

PWM

Capture

Compare

Same TMR1 time-base.

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

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

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

None.

None.

 2000 Microchip Technology Inc.

DS30605C-page 49

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