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TMS320F280049C: Question about CMPSS

Part Number: TMS320F280049C

Dear team:

My customer wants to output signals through CMPSS, but the two comparators inside his comparator module can only enable high-side comparators. The state of EPWM output is only the state of port A which will be limited by the internal given DAC, and the state of port B is Contrary to the state of A, there is no way to make the state of B independent of A and also limited by the internal low-side comparator DAC.

Below is the screenshot of code:

May I ask what is the reason?

Best regards