Microchip Technology MA330013 数据表

©

 2007 Microchip Technology Inc.

DS70165E-page 175

This module simplifies the task of generating multiple,
synchronized Pulse-Width Modulated (PWM) outputs.
In particular, the following power and motion control
applications are supported by the PWM module:

• 3-Phase AC Induction Motor

• Switched Reluctance (SR) Motor

• Brushless DC (BLDC) Motor

• Uninterruptible Power Supply (UPS)

The PWM module has the following features:

• 8 PWM I/O pins with 4 duty cycle generators

• Up to 16-bit resolution

• ‘On-the-fly’ PWM frequency changes

• Edge and Center-Aligned Output modes

• Single Pulse Generation mode

• Interrupt support for asymmetrical updates in 

Center-Aligned mode

• Output override control for Electrically 

Commutative Motor (ECM) operation

• ‘Special Event’ comparator for scheduling other 

peripheral events 

• Fault pins to optionally drive each of the PWM 

output pins to a defined state

• Duty cycle updates are configurable to be 

immediate or synchronized to the PWM time base

This module contains 4 duty cycle generators,
numbered 1 through 4. The module has eight PWM
output pins, numbered PWM1H/PWM1L through
PWM4H/PWM4L. The eight I/O pins are grouped into
high/low numbered pairs, denoted by the suffix H or L,
respectively. For complementary loads, the low PWM
pins are always the complement of the corresponding
high I/O pin.

The PWM module allows several modes of operation
which are beneficial for specific power control
applications. 

This data sheet summarizes the features
of this group of dsPIC33F devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “dsPIC30F
Family Reference Manual” (DS70046).