piclist 2002\08\17\181828a >
Thread: LCD Contrast Variation
www.piclist.com/techref/io/lcd/pic.htm?key=lcd
face picon face BY : Jinx email (remove spam text)



> > or recall it, the external circuit is slowish to respond and there might
> > be a rise-time delay that could mess up the r-m-w of the next
instruction
>
> Actually this problem will creep up with ANY r-m-w of the same port,
> doesn't have to be the same bit, or adjacent bits. Of course whether
> or not you need the nops is dependant on the load your PIC pins are
> driving and the speed of your PIC. TTYL

I knew it was something like that. I didn't feel like dragging out my
notes at 2:30am. Normally I'd have LCDs (or any external device)
as receptive as possible, eg by using short leads. Anything that has
a frequency response of a few MHz I don't much worry about, and
that includes common semis like LEDs, RAM, other logic and so on

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.


<001201c24638$046c1420$c99ea7cb@joe> 7bit

See also: www.piclist.com/techref/io/lcd/pic.htm?key=lcd
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) LCD Contrast Variation

month overview.

new search...