🚀 go-pugleaf

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