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Might be a generic dot matrix character LCD. Try this...

http://www.gorobotics.net/images/Schematic.gif

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Chetan Bhargava
http://www.bhargavaz.net




"Kris" <nospam@for.me> wrote in message
news:VG3N8.17167$dT3.601682@news.chello.be...
Hi!

I have a dot matrix LCD panel with a 14-pins connector. I was wondering if
anybody knew how to drive this... I did find the specification for 14-pin
LCD panels with x characters and y lines, but my module isn't like that.
Like I said, it's a dot matrix, so no characters and no lines. I guess it's
about 10cm (2-3 inch ?) diameter and has a resolotion of about 200x150 px.
(just a guess) Anybody any info on this type of panels?

The module itself is quite strange. I can't seem to find anything about it,
except for people who also need info. On the module there are the following
numbers: NEA0113FAA and 3104 228 70011 and LSS8A4011A and 60604958. It has
five OKI chips: 3x M5299A and 2xM6598. So if you might now more about this
specific module, that info is welcome as well!!

Thanks a lot
Kris

On Mon, 10 Jun 2002 17:37:02 +0200, "Kris" <nospam@for.me> wrote:

>Hi!
>
>I have a dot matrix LCD panel with a 14-pins connector. I was wondering if
>anybody knew how to drive this... 

     I think you can find what you need at:

          http://www.repairfaq.org/filipg/LINK/F_Tech_LCD.html

Gary Reichlinger wrote:

> On Mon, 10 Jun 2002 17:37:02 +0200, "Kris" <nospam@for.me> wrote:

> >Hi!

> >I have a dot matrix LCD panel with a 14-pins connector. I was wondering if
> >anybody knew how to drive this...

>      I think you can find what you need at:

>           http://www.repairfaq.org/filipg/LINK/F_Tech_LCD.html


Thanks for the good link.  I've been trying to find the data for the
Sharp LCD modules # LM40255 and LM40252A but I've come up with nothing
in both google and Sharp, which is a nightmare.  Still looking.  Thanks.

Kris,

You'll need to get specific info for your unit but in general the 14-pin LCD
interface is very common.  Almost certainly the pins will map to:

8-bit bidirectional data bus
1 bit to enable the module (like CS on a SRAM)
1 bit to indicate whether the processor is reading or writing to the LCD
1 pin for main power to the electronics on the LCD's board
2 pins for ground (or power negative reference)
1 pin for analog voltage to control the contrast on the LCD

The important part will be the information content you send over the data bus
to tell the LCD's little processor what you want displayed.  Look at the OKI
data for the chips you mentioned.  It might give some hints.  Often people
design a circuit just like the chip manufacturer's recommended circuit because
they can expect it to work with the LCD.

If you get the electrical interface right then you can't physically harm the
LCD by talking garbage to it.  It just won't display what you expect.  So
you'll be able  to mess around a bit and figure out what it wants to hear.

Some LCDs have a tight expectation about getting software reset and setup
commands after power is turned on.  I recommend you read thoroughly somebody's
application info even if it's not the one you have, just to see what kinds of
things matter.



Kris wrote:

> Hi!
>
> I have a dot matrix LCD panel with a 14-pins connector. I was wondering if
> anybody knew how to drive this... I did find the specification for 14-pin
> LCD panels with x characters and y lines, but my module isn't like that.
> Like I said, it's a dot matrix, so no characters and no lines. I guess it's
> about 10cm (2-3 inch ?) diameter and has a resolotion of about 200x150 px.
> (just a guess) Anybody any info on this type of panels?
>
> The module itself is quite strange. I can't seem to find anything about it,
> except for people who also need info. On the module there are the following
> numbers: NEA0113FAA and 3104 228 70011 and LSS8A4011A and 60604958. It has
> five OKI chips: 3x M5299A and 2xM6598. So if you might now more about this
> specific module, that info is welcome as well!!
>
> Thanks a lot
> Kris

In article <3D07C329.F75AF07D@cfl.rr.com>, rcooper17@cfl.rr.com 
says...
> Kris,
> 
> You'll need to get specific info for your unit but in general the 14-pin LCD
> interface is very common.  Almost certainly the pins will map to:
> 
> 8-bit bidirectional data bus
> 1 bit to enable the module (like CS on a SRAM)
> 1 bit to indicate whether the processor is reading or writing to the LCD
> 1 pin for main power to the electronics on the LCD's board
> 2 pins for ground (or power negative reference)
> 1 pin for analog voltage to control the contrast on the LCD
> 
> The important part will be the information content you send over the data bus
> to tell the LCD's little processor what you want displayed.  Look at the OKI
> data for the chips you mentioned.  It might give some hints.  Often people

I looked at OKIdata.com and that's NOT the place to find the LED info.  
It's http://www.okisemi.com/public/docs/DisplayTables-1.html or else 
in a similar area at that same web site.  So check it out. 

The modules I've been getting hold of are the Sharp LM40255 and 
LM40252A and use the Hitachi HD44780 controller.

> design a circuit just like the chip manufacturer's recommended circuit because
> they can expect it to work with the LCD.
> 
> If you get the electrical interface right then you can't physically harm the
> LCD by talking garbage to it.  It just won't display what you expect.  So
> you'll be able  to mess around a bit and figure out what it wants to hear.
> 
> Some LCDs have a tight expectation about getting software reset and setup
> commands after power is turned on.  I recommend you read thoroughly somebody's
> application info even if it's not the one you have, just to see what kinds of
> things matter.
> 
> 
> 
> Kris wrote:
> 
> > Hi!
> >
> > I have a dot matrix LCD panel with a 14-pins connector. I was wondering if
> > anybody knew how to drive this... I did find the specification for 14-pin
> > LCD panels with x characters and y lines, but my module isn't like that.
> > Like I said, it's a dot matrix, so no characters and no lines. I guess it's
> > about 10cm (2-3 inch ?) diameter and has a resolotion of about 200x150 px.
> > (just a guess) Anybody any info on this type of panels?
> >
> > The module itself is quite strange. I can't seem to find anything about it,
> > except for people who also need info. On the module there are the following
> > numbers: NEA0113FAA and 3104 228 70011 and LSS8A4011A and 60604958. It has
> > five OKI chips: 3x M5299A and 2xM6598. So if you might now more about this
> > specific module, that info is welcome as well!!
> >
> > Thanks a lot
> > Kris
 

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