TBCTR[15:0]
0x0000
0xFFFF
CTR=CMPA
CMPA
(value)
CMPB
(value)
TBPHS
(value)
TBPRD
(value)
CTR=CMPB
EPWMxSYNCI
0x0000
0xFFFF
CTR=CMPA
TBCTR[15:0]
CMPA
(value)
CMPB
(value)
TBPHS
(value)
TBPRD
(value)
CTR=CMPB
EPWMxSYNCI
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ePWM Submodules
2013
SPNU563A–March 2018
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Enhanced Pulse Width Modulator (ePWM) Module
• Up-down-count mode: used to generate a symmetrical PWM waveform.
To illustrate the operation of the first three modes, the timing diagrams in Figure 35-13 through Figure 35-
16 show when events are generated and how the EPWMxSYNCI signal interacts.
Figure 35-13. Counter-Compare Event Waveforms in Up-Count Mode
NOTE: An EPWMxSYNCI external synchronization event can cause a discontinuity in the TBCTR count
sequence. This can lead to a compare event being skipped. This skipping is considered normal operation and
must be taken into account.
Figure 35-14. Counter-Compare Events in Down-Count Mode
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