Specification for the PE12864LRF-001-H graphic LCD module in PDF format, 457 KB. The 12864 code indicates a 128 x 64 pixel layout, a size widely used in industrial controllers and test gear. Look here for the connector pinout, supply and LCD drive voltage, contrast circuit guidance, backlight ratings and interface timing. The document helps decide whether a blank or faded screen comes from the panel, its bias supply or the host. Make sure your module reads 001-H, as the HC1 variant has its own sheet.
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