Texas Instruments Tiva TM4C123GH6PM User Manual

Pulse Width Modulator (PWM)
15 Pulse Width Modulator (PWM)
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
15.1 Introduction
The PWM module provides up to four instances of a PWM generator block, and an output control
block. Each generator block has two PWM output signals, which can be operated independently,
or as a pair of signals with dead band delays inserted. Each generator block also has an interrupt
output and a trigger output. The control block determines the polarity of the PWM signals, and
which signals are passed through to the pins.
Some of the features of the PWM module are:
Up to four generator blocks, each containing:
• One 16-bit down or up/down counter
• Two comparators
• PWM generator
• Dead band generator
Control block
• PWM output enable
• Output polarity control
• Synchronization
• Fault handling
• Interrupt status
When discussing the various components of the PWM module, the following conventions are used:
The four generator blocks are called Gen0, Gen1, Gen2, and Gen3.
The two PWM output signals associated with each generator block are called OutA and OutB.
The eight output signals are called PWM0, PWM1, PWM2, PWM3, PWM4, PWM5, PWM6,
and PWM7.
PWM0 and PWM1 are associated with Gen0, PWM2 and PWM3 are associated with Gen1,
PWM4 and PWM5 are associated with Gen2, and PWM6 and PWM7 are associated with
Gen3.
Also, as a simplifying assumption for this API, comparator A for each generator block is used exclu-
sively to adjust the pulse width of the even numbered PWM outputs (PWM0, PWM2, PWM4, and
PWM6). In addition, comparator B is used exclusively for the odd numbered PWM outputs (PWM1,
PWM3, PWM5, and PWM7).
15.2 Functions
Functions
void ROM_PWMDeadBandDisable (uint32_t ui32Base, uint32_t ui32Gen)
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Texas Instruments Tiva TM4C123GH6PM Specifications

General

Brand	Texas Instruments
Model	Tiva TM4C123GH6PM
Category	Microcontrollers
Language	English