we are using an adsp-sc584 as a coprocessor in our new system and our application doesn't require DRAM. I am unsure what to do with the power to the dynamic memory controller, whether it can be grounded (or floating) or needs power to keep the part internally happy. I can't find any discussion of this in the notes.
Sorry for the delay in response. Since you are not using the external DDR memory, the unused VDD_DMC can be left floating.
Does ADI have a document describing what to do with all the pins of an unused DMC? I don't want to trust a multi-thousand dollar prototype run to a guy on a forum. It seems obvious that ADI should document what to do with a device where the DMC will not be needed.