Hello,
I am aiming to use the DP83867 in my design which is a little bit unusual and i would like to confirm the feasibility for such application.
We have a host that is connected to a USB hub where the USB hub integrates a 10/100 Mbps PHY on the other hand we have 5 port switch with 1 port as an SGMII
So we want to make a link between the host and the switch by using the DP83867 in between so that the MDI interface will be connected to the PHY in the USB Hub and the SGMII interface will be connected to the switch.
after going through the whole datasheet i didn't see anything that wouldn't allow such application but i wanted to confirm that this is feasible.
also i am not sure if the auto-negotiation would be recommended in this case since we will be using everything in a 100Mbps configuration.
another question is the MDI interface since it will be on the PCB we would like to use it as transformless design and only two pairs will be used A/B , what is recommended by TI for the other two pairs (termination to ground with cap?, leave flaoting....)
Below is a block diagram of the system.
Thank you
