mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 319

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 11
Pulse Width Modulator with Fault Protection (PMF15B6CV2)
11.1
The Pulse width Modulator with Fault protection (PMF) module can be configured for one, two, or three
complementary pairs. For example:
All PWM outputs can be generated from the same counter, or each pair can have its own counter for three
independent PWM frequencies. Complementary operation permits programmable dead-time insertion,
distortion correction through current sensing by software, and separate top and bottom output polarity
control. Each counter value is programmable to support a continuously variable PWM frequency. Both
edge- and center-aligned synchronous pulse width-control and full range modulation from 0 percent to 100
percent, are supported. The PMF is capable of controlling most motor types: AC induction motors
(ACIM), both brushless (BLDC) and brush DC motors (BDC), switched (SRM), and variable reluctance
motors (VRM), and stepper motors.
11.1.1
Freescale Semiconductor
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One complementary pair and four independent PWM outputs
Two complementary pair and two independent PWM outputs
Three complementary pair and zero independent PWM outputs
Zero complementary pair and six independent PWM outputs
Three complementary PWM signal pairs, or six independent PWM signals
Three 15-bit counters
Features of complementary channel operation
— Deadtime insertion
— Separate top and bottom pulse width correction via current status inputs or software
— Separate top and bottom polarity control
Edge-aligned or center-aligned PWM signals
Half-cycle reload capability
Integral reload rates from 1 to 16
Individual software-controlled PWM output
Programmable fault protection
Polarity control
Introduction
Features
MC9S12E256 Data Sheet, Rev. 1.08
319