>> How about using internal RAM as a cache and using LVDS to talk to
>> external
>> memory? It seems that could provide a lot of external memory without
>> using
>> a lot of pins.
>
> Absolutely- but do the math on it- the bandwidth is absolutely stunning.
> If you were to just emulate 32 bit wide 40MHz Flash- that's 1.2Gb/s... no=
t
> impossible by any means, but way beyond Microchip's current level of
> technology.  Two ways to jump that gap- #1: make the IP- which would take
> a long time, or #2: buy the IP, which would take a lot of money (and a lo=
t
> of time to integrate, but not quite as much as doing it all alone). Of
> course, everybody wants everything now. And cheap. And easy to design
> with. And more. To run a business, you've got to carefully choose among
> those.
>
> Me, I'm just an engineer. I wanna build cool stuff.
>
> Matt Bennett

Good point! I wonder if you could have lower speed external memory if the
internal cache is large enough to get a good hit rate. I'm often surprised
at how a relatively small cache has a really high hit rate.

Harold



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