Jack <p...@pluto.com> writes:
> "sani_figs" <a...@yahoo.com> wrote
> 
> > I need to use a 4x20 lcd but it's my first time to use suce a device.
> > Can you suggest any online material that I can read so that I can
> > implement the LCD display on my project? I'm using a zilog mcu and I
> > have enough pins for all the pins of the lcd.
> > Thanks!
> 
> You have to read the datasheet of the lcd controller.

And be advised that the Busy flag is not operative until
the controller is initialized.  Time delays have to be
used until initialization is complete.

>I need to use a 4x20 lcd but it's my first time to use suce a device. Can
>you suggest any online material that I can read so that I can implement the
>LCD display on my project? I'm using a zilog mcu and I have enough pins for
>all the pins of the lcd.

What Zilog part are you using? Z8? Z80? eZ80?

I just saw some wonderful replies to your earlier query
leading to the Optrix page with data and examples:
    http://www.optrex.com/pdfs/Dmcman_full.pdf
and this site
    http://www.epemag.wimborne.co.uk/resources.htm

There are many piggyback/daughterboards for LCDs
that convert them to RS232/serial, so they're easier to use.
Many of them publish the schematic and software
and detailed "gotchas" of the interface.
Dale Wheat's "PIC-an-LCD" A Character-Based Serial LCD Controller
was published in Circuit Cellar Inc. Issue #206 September 2007