On Mon, Jun 30, 2003 at 09:41:23AM +0100, Timothy Box wrote:
>
> Can I interface a LCD unit running at 5Volts with a PIC running at 3.3v. I
> read in the manual MAX "Voltage on all other pins with respect to VSS
> ..-0.3V to VDD + 0.3V"
>
> Which to me sounds like no but your opinions are appreciated

(assuming you mean HP44780 LCD)  Most people drive LCDs in write-only
mode (R/W tied to GND) in which case you should never see +5v on any
of the data lines.  If you're used to polling for busy, you can just
change to use delay loops instead (iirc 1.6ms for "hard" operations
like home/clear and 40ns for "easy" things like all the rest).

--
Ben Jackson
<ben@ben.com>
http://www.ben.com/

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