Microchip Technology MA300015 Data Sheet

© 2011 Microchip Technology Inc.

DS70150E-page 97

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

• Three Phase AC Induction Motor

• Switched Reluctance (SR) Motor

• Brushless DC (BLDC) Motor

• Uninterruptible Power Supply (UPS)

The Motor Control PWM module has the following
features:

• Eight PWM I/O pins with four 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 four duty cycle generators, num-
bered 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, respec-
tively. For complementary loads, the low PWM pins are
always the complement of the corresponding high I/O
pin.

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

This data sheet summarizes features of
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals, register descriptions and gen-
eral device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046).