PDF datasheet of 150 KB whose name, doc6229, is only a document number and does not state the component it describes. The doc-plus-number style matches the literature numbering Atmel used for its microcontroller and memory documentation, but the actual part must be read from the title page after opening. Treat it as a reference for pinout, electrical ratings and application notes once identified. Compare the part number and revision printed in the document with the marking on the chip before relying on any pin assignment or timing value.
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 @datasheet. 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.