TBCNT
EPWMxA
EPWMxB
TBPRD
(value)
CB
CAP
P P
P
CB
CA
P
P
Enhanced PWM (ePWM) Module
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Table 15-23 and Table 15-24 contains initialization and runtime register configurations for the waveforms
in Figure 15-28.
Figure 15-28. Up, Single Edge Asymmetric Waveform With Independent Modulation on EPWMxA and
EPWMxB—Active Low
(1) PWM period = (TBPRD + 1 ) × T
TBCLK
(2) Duty modulation for EPWMxA is set by CMPA, and is active low (that is, the low time duty is proportional to
CMPA).
(3) Duty modulation for EPWMxB is set by CMPB and is active low (that is, the low time duty is proportional to
CMPB).
(4) The Do Nothing actions ( X ) are shown for completeness here, but will not be shown on subsequent
diagrams.
(5) Actions at zero and period, although appearing to occur concurrently, are actually separated by one TBCLK
period. TBCNT wraps from period to 0000h.
1524
Pulse-Width Modulation Subsystem (PWMSS) SPRUH73H–October 2011–Revised April 2013
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