" requires that the device use only flash memory, not RAM or any other memory system, ... and memory control functions,"

this one here, in a break down makes no sense. What would be the intersect verbiage to have it make sense.

Anyway, IMO, this phrase has nothing to do with the flash entity or its use. those functions are Microcontroller /ROM having memory considerations of their own again up stream the flash.

dispositive? guess it depends on how you interpret it, I can't put a dispositive or positive effect on it, without a clear meaning...

modifications to both or one need to be made " not RAM or any other memory system, ... and memory control functions,"

in order for the relationship to make sense.

doni