Hi Jason. Long time no hear. As I am sure you know you want to be sure you
do not polarize the display. You need to reverse the voltage polarity the
segments see. You can do it but on a 64 driving 32 segments it will be a
little tricky depending on your other I/O needs. When I last did this type
of thing I used two port lines per segment and inverted them from each
other in a square wave. You could probably bias the substrate at 2.5 volts
and when you want the segment off change the driving pin to an input.
During debug you will probably degrade the prototype display when you stop
or single step your code but that shouldn't be catastrophic.

Larry

At 04:33 PM 10/28/97 -0500, you wrote:
>HELP..........
>
>I'm starting a project that will need a LCD display with about
>32 segments, I don't have the $ or board space for the 16C924,
>I'm thinking about bit banging the LCD with 16C64 and a 2:1
>multiplex.........
>
>One problem, I've never done this before, any suggestions
>before I stumble out on my own?
>Anything I should look out for?
>
>Thanks
>Jason Wolfson
>
>
>
>Attachment Converted: "C:\ULTRA271\EUDORA\ATTACH\BitbangL"
>
Larry G. Nelson Sr.
mailto:L.Nelson@ieee.org
http://www.ultranet.com/~nr