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LCD Bolymin BG24064C & Sitronix ST7920

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Desert Leo

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st7920 russian

Hi,
I have an experience with LCD (both char and graph) of Ampire, Anshan Yes and s.o., but this (Bolymin) is impossible to start. Power supply and contrast adjustmen are O.K., delays are more than sufficient, but ... nothing on the screen.
When LCD is powered, but with floating pins D7..D0, RS, RW and Reset, is possible from time to time to initate starting of uncontrolled writing of characher by picking pins. I'm missing something but what exactly?
Could someone help me with this LCD.
 

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