PDF of 536 KB for the Atmel AT93C46, a small serial EEPROM using the Microwire-style three-wire interface. Though tagged as a schematic, it is likely the datasheet with pinout, organization options, instruction set and timing. Repair technicians rely on it when reading or rewriting configuration data with a programmer, checking the ORG pin that sets 8- or 16-bit mode, and confirming chip select, clock and data lines. Save a copy of the original contents before writing anything.
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.