PDF of 217 KB named for the 24C00, a very small I2C serial EEPROM of 128 bits (16 bytes). No device, vendor or board is stated in the name, so treat it as a component datasheet. The tiny capacity means such chips usually hold just an ID or a few configuration bytes, and not every programmer supports them, so check your software before reading. The sheet covers pinout, addressing, supply range and timing. Back up the few bytes stored before attempting to rewrite them.
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.