Vault 7: Projects

This publication series is about specific projects related to the Vault 7 main publication.

PIC24F Family Reference Manual
DS39735A-page 47-2 Preliminary © 2010 Microchip Technology Inc.
47.1 INTRODUCTION
This section describes the Motor Control PWM (MCPWM) module in the PIC24F family of
devices.
47.1.1 Purpose of the MCPWM Module
The MCPWM module is used to generate a periodic pulse waveform, which is useful in motor
and power control applications. The MCPWM module acts as a timer to count up to a period
count value. The time period and the duty cycle of the pulses are both programmable.
47.2 FEATURES OF THE MCPWM MODULE
The MCPWM module is used to generate multiple synchronized pulse-width modulated outputs.
The following motor and power control applications are supported by the MCPWM module:
Three-Phase AC Induction Motor (ACIM)
Switched Reluctance Motor
Brushless DC (BLDC) Motor
Uninterruptible Power Supply (UPS)
Independent Power Factor Correction (PFC) in a motor system
Induction cooking systems
DC motor control systems
Single-phase inverter control
Single-phase ACIM control
The distinctive features of the MCPWM module are summarized below:
Up to six PWM outputs with four duty cycle generators
Dedicated time base that supports T
CY/2 PWM edge resolution
On-the-fly PWM frequency changes
Hardware dead-time generators
Output pin polarity programmed by device Configuration bits
Multiple operating and output modes:
- Single Event mode
- Edge-Aligned mode
- Center-Aligned mode
- Center-Aligned mode with double updates
- Complementary Output mode
- Independent Output mode
Manual override register for PWM output pins
Duty cycle updates that can be configured to be immediate or synchronized to the PWM
Up to two hardware Fault input pins with programmable function
Special Event Trigger for synchronizing analog-to-digital conversions
Output pins associated with the PWM can be individually enabled
Note: Depending on the PIC24F device variant, there are different versions of the
MCPWM module. Refer to the specific device data sheet for further details.

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