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 2013-2019 Microchip Technology Inc. DS30003035B-page 1

HIGHLIGHTS

This section of the manual contains the following major topics:

1.0 Introduction ...................................................................................................................... 2

2.0 Registers.......................................................................................................................... 3

3.0 Register Map.................................................................................................................... 4

4.0 Time Base Generator..................................................................................................... 17

8.0 Module Sync Outputs..................................................................................................... 57

9.0 Sync and Triggered Operation ....................................................................................... 58

5.0 Timer Modes .................................................................................................................. 18

10.0 Operation During Sleep and Idle Modes........................................................................ 64

11.0 Effects of a Reset........................................................................................................... 64

12.0 Related Application Notes.............................................................................................. 65

13.0 Revision History ............................................................................................................. 66

Capture/Compare/PWM/Timer (MCCP and SCCP)

dsPIC33/PIC24 Family Reference Manual

DS30003035B-page 2  2013-2019 Microchip Technology Inc.

1.0 INTRODUCTION

Select dsPIC33/PIC24 family devices include one or more Capture/Compare/PWM/Timer (CCP)

modules. These modules are similar to the multipurpose timer modules found on many other

16-bit microcontrollers. They also provide the functionality of the comparable Input Capture, Output

Compare and General Purpose Timer peripherals found in all other devices.

CCP modules can operate in one of three major modes:

• General Purpose Timer

• Input Capture

• Output Compare/PWM

There are two different forms of the module, distinguished by the number of PWM outputs that

the module can generate. Single output modules (SCCPs) provide only one PWM output.

Multiple output modules (MCCPs) can provide up to six outputs and an extended range of output

control features, depending on the pin count of the particular device.

All modules (SCCP and MCCP) include these features.

• User-Selectable Clock Inputs, Including System Clock and External Clock Input Pins

• Input Clock Prescaler for Time Base

• Output Postscaler for Module Interrupt Events or Triggers

• Synchronization Output Signal for Coordinating Other MCCP/SCCP Modules

with User-Configurable Alternate and Auxiliary Source Options

• Fully Asynchronous Operation in All Modes and in Low-Power Operation

• Special Output Trigger for A/D Conversions

• 16-Bit and 32-Bit General Purpose Timer Modes with Optional Gated Operation for Simple

Time Measurements

• Capture Modes:

- Backward compatible with previous Input Capture peripherals of the dsPIC33/PIC24 families

- 16-bit or 32-bit capture of time base on external event

- Up to four-level deep FIFO capture buffer

- Capture source input multiplexer

- Gated capture operation to reduce noise-induced false captures

• Output Compare/PWM Modes:

- Backward compatible with previous Output Compare peripherals of the dsPIC33/PIC24 families

- Single Edge and Dual Edge Compare modes

- Center-Aligned Compare mode

- Variable Frequency Pulse mode

- External Input mode

MCCP modules also include these extended PWM features:

• Single Output Steerable mode

• Brush DC Motor (Forward and Reverse) Modes

• Half-Bridge with Dead-Time Delay

• Push-Pull PWM Mode

• Output Scan Mode

• Auto-Shutdown with Programmable Source and Shutdown State

• Programmable Output Polarity

Note: This family reference manual section is meant to serve as a complement to device

data sheets. Depending on the device variant, this manual section may not apply to

all dsPIC33/PIC24 devices.

Please consult the note at the beginning of the “Capture/Compare/PWM/Timer

Modules (SCCP/MCCP)” chapter in the current device data sheet to check

whether this document supports the device you are using.

Device data sheets and family reference manual sections are available for

download from the Microchip Worldwide Website at: http://www.microchip.com

 2013-2019 Microchip Technology Inc. DS30003035B-page 3

Capture/Compare/PWM/Timer (MCCP and SCCP)

The SCCP and MCCP modules can be operated only in one of the three major modes (Capture,

Compare or Timer) at any time. The other modes are not available unless the module is

reconfigured.

A conceptual block diagram for the module is shown in Figure 1-1. All three modes use the Time

Base Generator and the common Timer register pair (CCPxTMRH/L). Other shared hardware

components, such as comparators and buffer registers, are activated and used as a particular

mode requires.

Figure 1-1: MCCP/SCCP Conceptual Block Diagram

2.0 REGISTERS

Each MCCP/SCCP module has up to seven control and status registers and eight buffer/counter

registers:

• CCPxTMRH and CCPxTMRL are the 32-Bit Timer/Counter register pair

• CCPxPRH and CCPxPRL are the 32-Bit Timer Period register pair

• CCPxRA is the 16-bit primary data buffer for Output Compare operations

• CCPxRB is the 16-bit secondary data buffer for Output Compare operations

• CCPxBUFH and CCPxBUFL are the 32-Bit Buffer register pair, which are used in Input

Capture FIFO operations

Time Base

Generator

Clock

Sources

Input Capture

Output Compare/

PWM

T32

CCSEL

MOD[3:0]

Sync and

Gating

Sources

16/32-Bit

Auxiliary Output

CCPxIF

CCTxIF

External

Capture

Compare/PWM

Output(s)

OCFA/OCFB

Timer

CCP Sync Out

Special Event Trigger Out (A/D)

Input

CCPxTMRH/L

Product specificaties

Merk:	Microchip
Categorie:	Niet gecategoriseerd
Model:	PIC24F08KM204

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