Elgato CAM LINK 4K
This PCB is relevant to the project because AXIOM Beta can send pretty much any data over an HDMI connection because the camera generates HDMI content inside its onboard FPGA. The problem is we don't control the HDMI receiver side - meaning recorder manufacturers do all kindS of strange things with the image (sharpening, color conversions, etc.) and in general only support very specific resolutions/framerates. There is also no standards for HDMI.
With the Elgato CAM Link 4k it's now possible to take over control of the receiver side.
This opens up a whole world of possibilities with regards to what data could be packed into the HDMI "frame" if it's used as a data container.
1 PCB
PCB Side 1.
PCB Side 2 (mirrored).
It is reported to be an 8 layer PCB. Probably atleast a 2-3+ HDI.
PCB Side View
PCB Layer 1/8
PCB Layer 2/8
PCB Layer 3/8
PCB Layer 4/8 (Now from the back, flipped for ease of alignment.) Another solid ground plane.
PCB Layer 5/8 (flipped) Power planes.
PCB Layer 6/8 (flipped) Two sneaky DDR memory pairs routed on this layer.
PCB Layer 7/8 (flipped) ground plane - Note: 2 cutouts in this plane, that seem to correspond to SW signals of DCDC buck converters. I've never seen that before? Maybe to reduce capacitance on the SW pin?
PCB Layer 8/8 (flipped) bottom layer
Pinout Mapping (WIP):
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
3 Further files/links