DVR21 datasheet(183/416 Pages) MICROCHIP

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DS30010118D-page 183

PIC24FJ256GA705 FAMILY

16.0 CAPTURE/COMPARE/PWM/

TIMER MODULES (MCCP)

PIC24FJ256GA705 family devices include several

Capture/Compare/PWM/Timer base modules, which

provide the functionality of three different peripherals of

earlier PIC24F devices. The module can operate in one

of three major modes:

• General Purpose Timer

• Input Capture

• Output Compare/PWM

This family of devices features four instances of the

MCCP module. MCCP1 provides up to six outputs and

an extended range of power control features, whereas

MCCP2-MCCP4 support two outputs.

The MCCPx modules can be operated only in one of

the three major modes at any time. The other modes

are not available unless the module is reconfigured for

the new mode.

A conceptual block diagram for the module is shown in

Figure 16-1. All three modules share a time base genera-

tor and a common Timer register pair (CCPxTMRH/L);

other shared hardware components are added as a

particular mode requires.

Each module has a total of eight control and status

registers:

• CCPxCON1L (Register 16-1)

• CCPxCON1H (Register 16-2)

• CCPxCON2L (Register 16-3)

• CCPxCON2H (Register 16-4)

• CCPxCON3L (Register 16-5)

• CCPxCON3H (Register 16-6)

• CCPxSTATL (Register 16-7)

• CCPxSTATH (Register 16-8)

Each module also includes eight buffer/counter registers

that serve as Timer Value registers or data holding

buffers:

• CCPxTMRH/CCPxTMRL (Timer High/Low

Counters)

• CCPxPRH/CCPxPRL (Timer Period High/Low)

• CCPxRAH/CCPxRAL (Primary Output Compare

Data Buffer)

• CCPxRBH/CCPxRBL (Secondary Output

Compare Data Buffer)

• CCPxBUFH/CCPxBUFL (Input Capture High/Low

Buffers)

FIGURE 16-1:

MCCPx CONCEPTUAL BLOCK DIAGRAM

Note:

This data sheet summarizes the features

of this group of PIC24F devices. It is

not intended to be a comprehensive

reference source. For more information,

refer to the “dsPIC33/PIC24 Family Ref-

erence

Manual”,

“Capture/Compare/

PWM/Timer

(MCCP

and

SCCP)”

(DS33035), which is available from the

Microchip website (www.microchip.com).

The information in this data sheet

supersedes the information in the FRM.

Clock

Sources

Input Capture

Output

Compare/PWM

T32

CCSEL

MOD<3:0>

Sync and

Gating

Sources

16/32-Bit

Auxiliary Output (to CTMU)

CCPxIF

CCTxIF

External

Compare/PWM

Output(s)

OEFA/OEFB

Timer

Sync/Trigger Out

Special Trigger (to A/D)

Capture Input

Time Base

Generator

CCPxTMRH/L

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