🚀 go-pugleaf

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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