MPC5643L datasheet(18/98 Pages) FREESCALE

18 / 98 page

MPC5643L Microcontroller Data Sheet, Rev. 3

Preliminary—Subject to Change Without Notice

Overview

Freescale Semiconductor

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Independently programmable PWM output polarity

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Independent top and bottom deadtime insertion

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Each complementary pair can operate with its own PWM frequency and deadtime values

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Individual software control for each PWM output

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All outputs can be forced to a value simultaneously

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PWMX pin can optionally output a third signal from each channel

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Channels not used for PWM generation can be used for buffered output compare functions

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Channels not used for PWM generation can be used for input capture functions

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Enhanced dual edge capture functionality

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Option to supply the source for each complementary PWM signal pair from any of the following:

— External digital pin

— Internal timer channel

— External ADC input, taking into account values set in ADC high and low limit registers

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DMA support

1.3.31

eTimer module

The Leopard provides three eTimer modules on the 257 MAPBGA device, and two eTimer modules on the 144 LQFP package.

Six 16-bit general purpose up/down timer/counters per module are implemented with the following features:

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Maximum clock frequency 120 MHz

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Individual channel capability

— Input capture trigger

— Output compare

— Double buffer (to capture rising edge and falling edge)

— Separate prescaler for each counter

— Selectable clock source

— 0–100% pulse measurement

— Rotation direction flag (Quad decoder mode)

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Maximum count rate

— Equals peripheral clock divided by 2 for external event counting

— Equals peripheral clock for internal clock counting

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Cascadeable counters

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Programmable count modulo

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Quadrature decode capabilities

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Counters can share available input pins

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Count once or repeatedly

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Preloadable counters

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Pins available as GPIO when timer functionality not in use

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DMA support

1.3.32

Sine Wave Generator (SWG)

A customized digital-to-analog converter is available to generate a sine wave based on 32 stored values for external devices (ex:

resolver).

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Frequency range from 1 kHz to 50 kHz

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Sine wave amplitude from 0.47 V to 2.26 V

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