8 Jun
2008
8 Jun
'08
8:53 a.m.
On Sunday 08 June 2008, Andrew Lynch wrote:
During the design, I wrestled with Flash ROM versus
EPROM for quite a
bit.
I went with EPROM since they are unchangeable in circuit and have
larger capacity for the same 32 pin socket.
My assumption was with cheap and plentiful EPROM programmers (search
for Willem on eBay ~$20) that practically everyone interested would
have one.
Flash ROM has its advantages but requires more advanced software for
in circuit reprogramming. The software would have to be written too.
Flash should actually be easier than an EPROM to program, especially
in-circuit, as it's designed to do that.
If you're worried about accidental erasure, just throw a switch or
jumper on the board to disable the /WE input to the flash.
Pat
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