I'm working on a project (hobbyist) which uses an LCD.  Although the LCD,
which of course uses the standard Hitachi HD44780 controller, is capable of
having 8 data lines coming in, only four are being used.  Therefore, one of
the first commands, during LCD initialization, is to tell the controller
that it only has 4 data lines.  It is my understanding that the controller
comes up in the 8-bit mode, and so has to be set to the 4-bit mode.  On the
LCD circuit board itself,  there are obviously 4 lines left hanging.  Should
these be tied to something?  Ground?  Since one of the first commands given
to the LCD controller is to tell it that it has only 4 data lines, seems
like the upper four would be immaterial.  But I have learned to be cautious
on such things.  :-)  (Gosh, wonder if I will ever get out of this job as
Assistant Manager of a fast-food joint and be able to do this for a living?
Probably not, but at least it gives me a dream.  Which is not all that bad
-- and by the way, the rug-rat had her 2nd birthday yesterday!  Candles and
inexpensive presents!).

Thanks,
Bill
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