Datasheet PDF, 86.3 KB, for the PG12232-C version of the PG12232 graphic LCD module line. The sheet likely lists pin functions, physical dimensions, supply and LCD drive voltages, and timing for the parallel bus. Use it to confirm the connector pinout when the host board drives the panel incorrectly, or to check whether the contrast potentiometer circuit gives the expected voltage. Option letters change features such as backlight, so match the full code printed on the module before relying on 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.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.