NXP document UM10391 in PDF format, 1017 KB. The UM prefix marks an NXP user manual, a reference describing a chip family, its registers, peripherals and pin functions, rather than a board schematic, even though it is filed under that type. The name does not mention which device it covers, so open it to confirm. Such a manual is handy when an NXP microcontroller on a board needs to be identified, reprogrammed or checked pin by pin. Compare the marking on the chip with the part numbers listed inside.
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.