PDF reference for the 28F010, catalogued as a schematic, size 110 KB. The part code identifies a 1 Mbit device in the 28F parallel flash family, while the name itself gives no vendor, speed or package. Technicians use such datasheets to locate address, data and control pins, confirm programming voltage and follow the erase and write procedure when servicing older firmware chips. Read the full marking on the component and keep a backup of its contents before erasing or writing a new image.
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 @cyberlanelectonik. 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.