KiCAD footprints for OAK-SoM Pro

PeterMilani

Are there any footprints for the OAK Som Pro for developing a carrier board. It would be nice if there were existing kicad ones, failing that a pdf. I understand the datasheet has a mechanical dimensions and arrangement of the DF40HC-100 and M3 holes, but doesn't show the pin numbering. I am unsure which is the number 1 and number 101 pins, so I was hoping someone may have already made a footprint and symbol to aid integration

cheers

Peter

jakaskerl

Hi @PeterMilani
SoM designs are not accessible on depthai-hardware. I'd suggest looking at carriers like FFC-4P which will give you an idea of how to design your own. Generally the pins (1 and 100) are marked on the PCB.

Thanks,
Jaka

PeterMilani

Hi @jakaskerl, I wasn't after the Som designs as I understand they're closed but looking for a footprint that just treats the som as a component. There are some example footprints for like the RPI CM4(https://www.digikey.com.au/en/maker/projects/creating-a-raspberry-pi-compute-module-4-cm4-carrier-board-in-kicad/7812da347e5e409aa28d59ea2aaea490), and other som boards but its difficult custom interface board without understanding where pin 1 and pin 101 are on the board.

I can see there's a dot next to the 100pin recepticals, and I might be able to work out which dot corresponds to which pin. Confidence will be low without a proper footprint drawing as the layout is all mirrored.

I thought it might have already been done by someone before that why I asked.

PeterMilani

@jakaskerl any luck with a footprint for the Som Pro?

Is connector A on the right and connector B on the left?

erik

@PeterMilani A is on the side (right), B is in the middle (left on the img).

PeterMilani

@erik thanks, what is the numbering internal to the connectors? Do you set them incrementally increasing down one side then the other, or does the pin number alternate?

PeterMilani

@erik Just looking at the fab outputs for the ffc 4P, The answer is alternating each side down the connector from the camera DP circuits, matching the numbering in the datasheet:

PeterMilani

I moved this post to a separate question. As the above has been answered.