Elgato CAM LINK 4K
From apertus wiki
1 PCB
It is reported to be an 8 layer PCB. Probably atleast a 2-3+ HDI.
Credit: https://twitter.com/GregDavill
Pinout Mapping (WIP):
https://docs.google.com/spreadsheets/d/17SmOY7Npzz2Hj1kz4DWKzrBAl0PYMWU085NeT3AY0D4/edit#gid=0
2 Firmware
a dump of the SPI communication (and the decoded flash data) can be found here:
http://vserver.13thfloor.at/Stuff/ELGATO/boot_decode.txt
http://vserver.13thfloor.at/Stuff/ELGATO/boot.vcd.xz
Further files: