Re: uC and LCD (or uC and LCD controller) interfacing

On Tue, 21 Aug 2007 03:58:34 -0700, Ajab wrote:

Can anyone give me any application notes/links which will help me to
understand the uC and LCD (or uC and LCD controller) interfacing ?

Have you done web searches?

An LCD segment turns dark (or light) when you apply voltage, and will get
stuck that way if the voltage stays on. So an LCD controller applies a
square wave to the segments you want to turn on -- that's a big part of
the reason you need a controller instead of just logic and some resistors.

Generally you only connect a micro directly to an LCD if the micro has an
LCD controller built in.

An LCD controller usually has an interface that makes it look like memory.
You write the correct commands and data to it, and it does what you want.

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
.

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