Datasheet for the T6963C, the Toshiba controller widely used in graphic dot-matrix LCD modules, supplied as a 1.76 MB PDF. It documents the command set, display RAM interface, pin functions and timing diagrams needed to drive or debug such a display. Technicians reach for it when a graphic LCD module shows garbage or stays blank, to check supply pins, oscillator, data bus and control lines with a scope or logic analyser. Make sure the controller marking on the module board really reads T6963C before following it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @acodis_lcd_datasheets_EDID. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.