MCF5272CVM66 Datasheet, PDF (407/544 Pages) Freescale Semiconductor, Inc – MCF5272 ColdFire® Integrated Microprocessor

Chapter 18
Pulse-Width Modulation (PWM) Module
This chapter describes the configuration and operation of the pulse-width modulation (PWM) module. It
includes a block diagram, programming model, and timing diagram.
18.1 Overview
The PWM module shown in Figure 18-1, generates a synchronous series of pulses having programmable
duty cycle. With a suitable low-pass filter, the PWM can be used as a digital-to-analog converter.
SYS CLOCK
PWCR[CKSL]
PRESCALER
EN
COUNTER
FRC1
COMPARATOR
GENERATOR
WIDTH BUFFER
PWM_OUT0
PWM_OUT1
PWM_OUT2
Figure 18-1. PWM Block Diagram (3 Identical Modules)
MCF5272 ColdFire^® Integrated Microprocessor User’s Manual, Rev. 3
Freescale Semiconductor
18-1