Microchip PIC32MK0512MCF100 Handleiding

Microchip Niet gecategoriseerd PIC32MK0512MCF100

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Section 44. Motor Control PWM (MCPWM)

This section of the manual contains the following major topics:

44.1 Introduction .................................................................................................................. 44-2

44.2 Features....................................................................................................................... 44-2

44.3 Control Registers ......................................................................................................... 44-3

44.4 Architecture Overview................................................................................................ 44-37

44.5 Module Description .................................................................................................... 44-39

44.6 PWM Output State Control ........................................................................................ 44-43

44.7 PWM Operating Modes.............................................................................................. 44-46

44.8 PWM Generation ....................................................................................................... 44-61

44.9 Write Protection ......................................................................................................... 44-79

44.10 PWM Output Modes................................................................................................... 44-80

44.11 PWM Generator Triggers ........................................................................................... 44-84

44.12 PWM Interrupts .......................................................................................................... 44-90

44.13 PWM Faults ............................................................................................................... 44-91

44.14 PWM Current-Limit .................................................................................................... 44-96

44.15 Simultaneous PWM Faults and Current-Limits ........................................................ 44-100

44.16 PWM Fault and Current-Limit Trigger Outputs to ADC ............................................ 44-100

44.17 Special Features ...................................................................................................... 44-102

44.18 Power-Saving Modes............................................................................................... 44-117

44.19 External Control of Individual Time Base(s)............................................................. 44-118

44.20 Application Information ............................................................................................ 44-118

44.21 Related Application Notes........................................................................................44-130

44.22 Revision History .......................................................................................................44-131

PIC32 Family Reference Manual

44.1 INTRODUCTION

This section describes the Motor Control Pulse-Width Modulator (MCPWM) module and its

associated operational modes. The MCPWM module in the PIC32 device family supports a

wide variety of PWM modes, and is ideal for power conversion/motor control applications.

Some of the common applications include:

• SMPS Applications:

- AC-to-DC converters

- DC-to-DC converters

• AC and DC motors (i.e., BDC, BLDC, PMSM, ACIM, SRM)

• Inverters

• Battery chargers

• Digital lighting

• Uninterrupted Power Supply (UPS)

• Power Factor Correction (PFC)

44.2 FEATURES

The MCPWM module consists of the following major features:

• Two master time bases

• Up to 12 PWM generators, each with an individual time base:

- Eight PWM generators with complimentary outputs

- Four additional PWM generators with single-ended outputs

• Individual period, duty cycle, and phase shift registers with on-the-fly updates for each

generator

• Duty cycle, dead time, phase shift and frequency resolution generated from the System

Clock (SYSCLK)

• Independent fault and current-limit inputs for all 12 PWM generators

• Redundant Output mode

• Secondary Duty Cycle register supports Asymmetric PWM mode

• Push-Pull Output mode

• Complementary Output mode

• Center-Aligned PWM mode

• Output override control

• Special Event Trigger for synchronizing analog-to-digital conversions

• PWM capture feature

• Prescaler for input clock

• Analog-to-Digital Converter (ADC) triggering with PWM

• Leading-edge Blanking (LEB) functionality

• Dead time compensation

• Output clock chopping

• Output pins associated with the PWM module can be individually enabled

• Manual override SFR bits for PWM output pins

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 PIC32 devices.

Please consult the note at the beginning of the “Motor Control PWM (MCPWM)”

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 Web site at: http://www.microchip.com

Section 44. Motor Control PWM (MCPWM)

44.3 CONTROL REGISTERS

The following registers control the operation of the MCPWM module.

44.3.1 Master Time Base Control Registers

•PTCON: PWM Primary Time Base Control Register

This register controls the operation of the primary time base, including enabling or disabling

the MCPWM module, providing module status, setting the special event trigger, trigger

postscaler, and interrupts. In addition, this register can be used to control the PWM output

override logic level and prescale the primary PWM input clock.

• PTPER: Primary Master Time Base Period Register

This register stores the synchronization period for the generators that derive their clock

source from the primary master time base.

•SEVTCMP: PWM Primary Special Event Compare Register

This register stores the compare value that is used to trigger the ADC module based on the

primary master time base.

•PMTMR: Primary Master Time Base Timer Register

This register provides the reload synchronization to the generator timers that derive their

clock from the primary master time base.

•STCON Secondary Master Time Base Control Register

This register prescales the secondary PWM input clock, selects the synchronization source

for the secondary master time base, and specifies the synchronization setting for secondary

master time base control.

•STPER: Secondary Master Time Base Period Register

This register stores the synchronization period for the generators that derive their clock

source from the secondary master time base.

•SSEVTCMP: PWM Secondary Special Event Compare Register

This register provides the compare value that is used to trigger the ADC module based on

the secondary master time base.

•SMTMR: Secondary Master Time Base Timer Register

This register provides the reload synchronization to the generator timers that derive their

clock from the secondary master time base.

• CHOP: PWM Chop Clock Generator Register

This register enables/disabled the chop clock generator and provides the chop clock

frequency.

•PWMKEY: PWM Unlock Register

This register accepts the unlock sequence to allow writes to the IOCONx register.

Note: Not all registers are available on all devices. Refer to the “Motor Control PWM

(MCPWM)” chapter in the specific device data sheet for availability.

Product specificaties

Merk:	Microchip
Categorie:	Niet gecategoriseerd
Model:	PIC32MK0512MCF100

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