Driving Unknown 64x128 Monochrome LCD

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AmirRashedi

Joined Nov 16, 2018
1
Hello Every One!

I have two unknown LCD witch I want to drive them with arduino or AVR. The only things I have are two part number "5539SYPYBWC" and "ES50681YLY". Googling them had No result. Do you Have any Idea for finding These LCDs Controller Chip?
 

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atferrari

Joined Jan 6, 2004
3,447
Hola Amir

Are you trying to identify the pins, right?

Regarding LCD1, I have no idea.

LCD2 is the most common with 18 pins to the connector, plus two more terminals K & A (on the right bottom corner of pictures 2 or 3). These two could be not even used in your LCD. They provide access to control intensity of backlight/contrast.

Long ago, I was given a brand new similar display, but no datasheet anywhere. By comparing the different layouts (from a huge amount of datasheets for other brands) I could finally guess mine. Not sure if I could retrieve the Excel file where I made the summary of all patterns. If lucky, I will post it here.

Meantime, just with a VOM, try to identify power and ground pins. Start with GND first.
 

atferrari

Joined Jan 6, 2004
3,447
I succeed. Excel file is attached.

Please notice, as I told you, that the very first two pins you should identify are 5V and GND. That way you could discard from the beginning a group at the right or the left of pin numbers altogether. It worked for me in the first try.

After that, I programmed one PIC micro from the 18F family to implement the John Conway's "Life" game. Thrilling and funny. But that is a different story.
 

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atferrari

Joined Jan 6, 2004
3,447
Sometimes, insomnia allows you to get inspired and review things. Last night, while giving just a casual look to the Excel in the previous post, I realized that on the left and on the right there are columns exhibiting same values. :( Not as in the original thing.

I simply obliterated valid ones by repeating a column, when tidying up the whole thing. And all these years thinking this Excel was the valid version of what I did with pencil and paper...! :(

Anyway, the info there is valid, albeit not complete, and could be even enough for you to identify the pins.

Just please let me know you have read it. Buena suerte.
 
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