2007 Microchip Technology Inc.
Preliminary
DS70165E-page 175
dsPIC33F
15.0
MOTOR CONTROL PWM
MODULE
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.
Note:
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).
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