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ADV7511 Aspect ratio setting

Category: Datasheet/Specs
Product Number: ADV7511


I have two questions below.

If 0x56[3:0] is set to "1000 = Same as Aspect Ratio", is it correct to recognize that the Aspect Ratio value of 0x17[1] is reflected?

➁Is 0x17[1] automatically populated from the detected VIC (0x3E[7:2])?
 Or do I have to manually look at the value of 0x3E[7:2] and set the value to 0x17[1]?

Best Regard.