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Start
Clk
One
shot
Pulse-width
PCCTL
[OSHTWTH]
PWMA_ch
Bypass
Dividerand
dutycontrol
PSCLK
OSHT
EPWMxA
PCCTL
[CHPEN]
EPWMxA
/8SYSCLKOUT
Pulse-width
Start
shot
Clk
One
PCCTL
[OSHTWTH]
1
OSHT
PCCTL[CHPFREQ]
PCCTL[CHPDUTY]
PWMB_ch
Bypass
EPWMxA
EPWMxB
1
0
0
2.6.4Waveforms
PSCLK
EPWMxA
EPWMxB
EPWMxA
EPWMxA
PWM-Chopper(PC)Submodule
Figure2-31.PWM-ChopperSubmoduleOperationalDetails
Figure2-32showssimplifiedwaveformsofthechoppingactiononly;one-shotandduty-cyclecontrolare
notshown.Detailsoftheone-shotandduty-cyclecontrolarediscussedinthefollowingsections.
Figure2-32.SimplePWM-ChopperSubmoduleWaveformsShowingChoppingActionOnly
56ePWMSubmodulesSPRU791D–November2004–RevisedOctober2007
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