TMS320F28379D: The 100% ePWM duty cycle

Part Number: TMS320F28379D

Hi champs,

My customer uses F28379D LaunchPad evaluating ePWM with bitfield epwm_deadband example project, he disables dead band function and just evaluates ePWM duty cycle, he gets 100% duty cycle PWM1A output by setting CMPA to 0 and obtains 0% duty cycle when CMPA = 6000.

Is this reasonable? According to TRM and application report SPRAAI1, we should set AQCTLA.bit.ZRO = AQ_SET then get 100% duty cycle, but we don't handle this in this example code.

I don't know how this could happen, please advise your comments if any, thanks for help.