Time-Base Submodule - Texas Instruments Concerto F28M36 Series Technical Reference Manual

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ePWM Submodules

7.2.2 Time-Base (TB) Submodule

Each ePWM module has its own time-base submodule that determines all of the event timing for the

ePWM module. Built-in synchronization logic allows the time-base of multiple ePWM modules to work

together as a single system.

Digital Compare

Purpose of the Time-Base Submodule

You can configure the time-base submodule for the following:

Specify the ePWM time-base counter (TBCTR) frequency or period to control how often events occur.

Manage time-base synchronization with other ePWM modules.

Maintain a phase relationship with other ePWM modules.

Set the time-base counter to count-up, count-down, or count-up-and-down mode.

Generate the following events:

– CTR = PRD: Time-base counter equal to the specified period (TBCTR = TBPRD) .

– CTR = Zero: Time-base counter equal to zero (TBCTR = 0x00).

Configure the rate of the time-base clock; a prescaled version of the CPU system clock

(SYSCLKOUT). This allows the time-base counter to increment/decrement at a slower rate.

C28 Enhanced Pulse Width Modulator (ePWM) Module

illustrates the time-base module's place within the ePWM.

Figure 7-4. Time-Base Submodule

Counter Compare

Digital Compare

Digital Compare

SPRUHE8E – October 2012 – Revised November 2019

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