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

[Frank Wallenwein]

> 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