I'm going to differ and say that the decision depends largely on how fast
you need to get to the data, and how often you access it.  Something that
routes packets around a network would need on board or on-chip RAM;
something that needed to pull a phone number from an address book could use
the serial memory.


Generally, by the time I run out of memory, Microchip has made a bigger
version available.  I do recall they had reference design for an Ethernet
PIC that kept the web site in a serial memory.
--=20
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