> Talking to the display can be done using 4 or 8 bits. I'm using 8
> bits for now until I can prove any advantage to using 4. Pin count
> costs, perhaps? Any opinions on this please?

I do tend to use 4-bit as that frees up half a port. For example b4-
b7, leaving b0-b3 available as INT pins or for RS, R/W, E etc

Unless it's a very time-dependent application 8-bit vs 4-bit isn't
really a concern as far as the s/w goes. Only a little extra time is
spent sending 2 x 4 bits. LCD string prints can be managed, eg
process one character at a time, within a separate or existing
interrupt to make it almost transparent.

Joe




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