Z P Z P
TBCNT
EPWMxA
EPWMxB
CA CA
CB
CB
Architecture
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SPRUH91D–March 2013–Revised September 2016
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Enhanced High-Resolution Pulse-Width Modulator (eHRPWM)
Table 14-23 and Table 14-24 contains initialization and runtime register configurations for the waveforms
in Figure 14-27. Use the code in Example 14-1 to define the headers.
Figure 14-27. Up-Down-Count, Dual Edge Asymmetric Waveform, With Independent Modulation on
EPWMxA—Active Low
(1) PWM period = 2 × TBPRD × TBCLK
(2) Rising edge and falling edge can be asymmetrically positioned within a PWM cycle. This allows for pulse
placement techniques.
(3) Duty modulation for EPWMxA is set by CMPA and CMPB.
(4) Low time duty for EPWMxA is proportional to (CMPA + CMPB).
(5) To change this example to active high, CMPA and CMPB actions need to be inverted (i.e., Set ! Clear and
Clear Set).
(6) Duty modulation for EPWMxB is fixed at 50% (utilizes spare action resources for EPWMxB)
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