Embedded controller firmware for the Hevin SKY motherboard, board number 14264-1, with 448 in the name pointing to the Wistron 448-series part code. The small 52.5 KB archive fits an EC image rather than a full system BIOS. Wistron builds this board, and HP uses it in the Pavilion x360 11 line. A technician reflashes such a file onto the EC or its dedicated flash with a programmer when a laptop shows no power, no charging or a dead keyboard after a corrupted update. Read and save the original contents first, and check that the image size matches the target chip.
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 @freeschematicdiagram. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →