A schematic diagram. Shared as “How_To_Read_Schematics_Power_Microcontroller_Function_Part_2_part1.rar” — a .rar file, 850 MB.
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 @nityatechnology2020. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)