[En-Nut-Discussion] LCD Display - only 2 I/O Ports

[Marc Wetzel]

Hmm,

I don't wanted to be rude, sorry if my msg could be taken like that.

In my "display" knowledge it was always good to get the status back to
the host (lcd->controller)
So some kind of RW or SerialOut Pin should be connected.

But you are absolutely right, that the minimal pincount (2) in this mode
is unbeatable!

Thank you for the info, 

/Marc

> -----Original Message-----
> From: en-nut-discussion-bounces at egnite.de 
> [mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of 
> Frank Wallenwein
> Sent: Sunday, January 11, 2004 1:00 AM
> To: Ethernut User Chat (English)
> Subject: Re: [En-Nut-Discussion] LCD Display - only 2 I/O Ports
> 
> 
> 
> > Please help me: What is so cool about _only_ TWO I/O Ports?
> 
> Ok Ok - you're right.
> Of course  two pins - not two ports.   :-o
>  
> > And I also assume that you need 3.
> 
> Well - i'm just using two I/O pins. 
> What would you do with the third one  ? 
> 
> I have connected my Display with 4 Wires. 
> +5V      Power supply 
>  GND    Power supply
>  SID     Serial data from Ethernut to Display ( I/O Pin no. 1)
>  SCLK    Clock  ( I/O Pin no. 2)
> 
> You could - if you like - use more pins :
> SOD   read back data from display
> RESET   reset the Display
> LED     light 
> CS      chip select - if you have several displays
> etc.
> 
> But you don't need all these.
> 
> > How much did you pay?
> 
> Just to give you an idea - 
> Conrad Elekronik  wants  27,94 Euro.
> I guess you can get it for less either at 
> Electronic Assembly - or somewhere else.
> 
> Greetings
> Frank
> 
> 
> Am Samstag, 10. Januar 2004 22:54 schrieb Marc Wetzel:
> > Please help me: What is so cool about _only_ TWO I/O Ports?
> >
> > I assume you mean pins :). And I also assume that you need 3.
> >
> > How much did you pay?
> >
> > Greetings
> > /Marc
> >
> > > -----Original Message-----
> > > From: en-nut-discussion-bounces at egnite.de
> > > [mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of Frank 
> > > Wallenwein
> > > Sent: Saturday, January 10, 2004 5:10 PM
> > > To: Ethernut User Chat (English)
> > > Subject: [En-Nut-Discussion] LCD Display - only 2 I/O Ports
> > >
> > >
> > > Hello Group,
> > >
> > > i  found a 4*20 LCD Display, that can be connected to
> > > the Ethernut board with just   2 - I/O Ports.
> > >
> > > If you're looking for a LCD Display and if you're short 
> of I/O Ports 
> > > have a look at http://www.tklinux.de/ks0073.html
> > > where you'll find more information and a Nut/Os driver.
> > >
> > >  Regards,
> > >
> > > Frank
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