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CCS/TMS320F28069M: TZDCSEL setting problem

Part Number: TMS320F28069M


Tool/software: Code Composer Studio

Dear Sirs:

  I'm trying to use the comparator to limit current. Comparator working is correct. When I set the PWM tzone registor, I find some problem. 

This is my Comparator setting.

 

This is PWM Digital Compare setting.

I don't know why TZDCSEL have to set different value to get the same result between DCAEVT1 and DCAEVT2.

 

Thanks,

 

Li-Feng