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ePWM Submodules
EPWMxA
SYSCLKOUT
EPWMxB
7.2.6.4
Waveforms
Figure 7-35
shows simplified waveforms of the chopping action only; one-shot and duty-cycle control are
not shown. Details of the one-shot and duty-cycle control are discussed in the following sections.
Figure 7-35. Simple PWM-Chopper Submodule Waveforms Showing Chopping Action Only
EPWMxA
EPWMxB
PSCLK
EPWMxA
EPWMxB
684
C28 Enhanced Pulse Width Modulator (ePWM) Module
Figure 7-34. PWM-Chopper Submodule Operational Details
Start
One
shot
Clk
Pulse-width
/8
PCCTL
[OSHTWTH]
PCCTL
[OSHTWTH]
Pulse-width
Clk
One
shot
Start
Copyright © 2012–2019, Texas Instruments Incorporated
Bypass
OSHT
PWMA_ch
Divider and
PSCLK
duty control
PCCTL[CHPFREQ]
PCCTL[CHPDUTY]
PWMB_ch
OSHT
Bypass
SPRUH22I – April 2012 – Revised November 2019
www.ti.com
0
EPWMxA
1
PCCTL
[CHPEN]
1
EPWMxB
0
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