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TBCTR

EPWMxA

EPWMxB

TBPRD

value

CAP

P P

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Action-Qualifier (AQ) Submodule

Figure 2-22. Up, Single Edge Asymmetric Waveform With Independent Modulation on EPWMxA and

EPWMxB—Active Low

A PWM period = (TBPRD + 1 ) × T

TBCLK

B Duty modulation for EPWMxA is set by CMPA, and is active low (that is, the low time duty is proportional to CMPA).

C Duty modulation for EPWMxB is set by CMPB and is active low (that is, the low time duty is proportional to CMPB).

D Actions at zero and period, although appearing to occur concurrently, are actually separated by one TBCLK period.

TBCTR wraps from period to 0000.

Example 2-3 contains a code sample showing initialization and run time for the waveforms in Figure 2-22 .

SPRU791F – November 2004 – Revised July 2009 ePWM Submodules 45

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Pulse 280 Spezifikationen Seite 45