Sure it have 8 bits... 2 successive read .. well something like stated somewhere in the MCP datasheet. It must exist a quick drwaing of it somewhere in.
if you really want to add stuff, 4 choice spring to mind
use a bigger PIC than the 16F28, then just read the i/o, send it to the 4550 via USART.
Use a keypad decoder like 74c922
Use a single (or more) A/D pin of the 4550 with a multi-step voltage divider... yisssh
Find a multiplexer... time is short now, but it have to exist, i had the 4067 idea... but i'm not sure... i must forget something on this chip.. what? i don't know.
Last edited by mister_e; - 8th July 2006 at 03:18.
Steve
It's not a bug, it's a random feature.
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