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About "range" register of ADV7482


I have a question about "range" register of ADV7482 and please see the attached file for details.

* Q1
I'd like to know how to handle data over Y236/CbCr240 or below Y16/CbCr16) when the "range" register is set to "0".
My understanding is shown in the figure below. Please confirm wheter it is correct or not.

* Q2
When "range" register is set to 0, I think the output is assumed as following two cases (2-1 and 2-2).
Which is correct?

CASE 2-1

CASE 2-2