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TMS320F2800132: Digital compare (DC) submodule

Part Number: TMS320F2800132

Tool/software:

Refer SPRUIX1A – OCTOBER 2022 – REVISED MARCH 2023, Page 1294

I have a doubt on the significance of the DCTRIPSEL Register.
The Trip Combination Input has option to select any combination of the trip zone inputs TRIPIN1 .... TRIPIN15.
DCTRIPSEL is also used to select any one of the trip zone inputs TRIPIN1 .... TRIPIN15. 
As per my understanding, Trip Combination Input is sufficient to select the required combination of the trip zone inputs.
What is the importance of the DCTRIPSEL Register ?