PIC18F6410ESLASHPTSQTP datasheet(162/404 Pages) MICROCHIP

162 / 404 page

PIC18F6310/6410/8310/8410

DS39635A-page 160

Preliminary

 2004 Microchip Technology Inc.

15.1

CCP Module Configuration

Each Capture/Compare/PWM module is associated

with a control register (generically, CCPxCON) and a

data register (CCPRx). The data register, in turn, is

comprised of two 8-bit registers: CCPRxL (low byte)

and CCPRxH (high byte). All registers are both

readable and writable.

15.1.1

CCP MODULES AND TIMER

RESOURCES

The CCP modules utilize Timers 1, 2 or 3, depending

on the mode selected. Timer1 and Timer3 are available

to modules in Capture or Compare modes, while

Timer2 is available for modules in PWM mode.

TABLE 15-1:

CCP MODE – TIMER

RESOURCE

The assignment of a particular timer to a module is

determined by the Timer-to-CCP enable bits in the

T3CON register (Register 14-1). All three modules may

be active at any given time and may share the same

timer resource if they are configured to operate in the

same mode (Capture/Compare or PWM) at the same

time.

Depending on the configuration selected, up to three

timers may be active at once, with modules in the same

configuration (Capture/Compare or PWM) sharing

timer resources. The possible configurations are

shown in Figure 15-1.

15.1.2

CCP2 PIN ASSIGNMENT

The CCP2MX configuration bit determines if CCP2 is

multiplexed to its default or alternate assignment. By

default, CCP2 is assigned to RC1 (CCP2MX = 1). If

CCP2MX is cleared, CCP2 is multiplexed with either

RE7 or RB3 (RE7 is the only alternative assignment for

64-pin devices).

For any device in Microcontroller mode, the alternate

CCP2 assignment is RE7. For 80-pin devices in

Microcprocessor, Extended Microcontroller or Microcon-

troller with Boot Block mode, the alternate assignment is

RB3. Note that RE7 is the only alternative assignment for

64-pin devices.

Changing the pin assignment of CCP2 does not auto-

matically change any requirements for configuring the

port pin. Users must always verify that the appropriate

TRIS register is configured correctly for CCP2

operation, regardless of where it is located.

FIGURE 15-1:

CCP AND TIMER INTERCONNECT CONFIGURATIONS

CCP Mode

Timer Resource

Capture

Compare

PWM

Timer1 or Timer3

Timer2

Timer1 is used for all

Capture and Compare

operations for all three

CCP modules. Timer2

is used for PWM oper-

ations for all three CCP

modules. Timer3 is not

used.

All modules may share

Timer1

and

Timer2

resources as common

time bases.

Timer1

used

for

Capture and Compare

operations for CCP1

and Timer 3 is used for

CCP2 and CCP3.

All

three

modules

Timer2

common time base for

PWM operation.

Timer3 is used for all

Capture and Compare

operations for all three

CCP modules. Timer2

is used for PWM oper-

ations for all three CCP

modules. Timer1 is not

used.

All modules may share

Timer2

and

Timer3

resources as common

time bases.

TMR1

TMR2

TMR3

CCP3

CCP2

CCP1

TMR1

TMR2

TMR3

CCP3

CCP2

CCP1

TMR1

TMR2

TMR3

CCP3

CCP2

CCP1

TMR1

TMR3

TMR2

CCP3

CCP2

CCP1

T3CCP2:TCCP1 = 00

T3CCP2:TCCP1 = 01

T3CCP2:TCCP1 = 10

T3CCP2:TCCP1 = 11

Timer1

used

for

Capture and Compare

operations for CCP1

and CCP2. Timer 3 is

used for CCP3.

All

three

modules

Timer2

common time base for

PWM operation.

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