DP83826I: Using 4-Pair Ethernet Magnetics to Achieve PoE++ but with a 10/100 Ethernet Interface; What about the unused Data Lines?

Hello,

Firstly, sorry I had to lie about the part in the title. I couldn't specify the MSP432E401Y without it defaulting to the microcontrollers forum and I don't know if they would be able to answer my question there. I wish it would allow us to manually select the forum we wanted. I was directly specifically to this forum for my question.

I am trying to figure out what to do with the remaining data lines in my PoE design. I am trying to use all 8 Ethernet wires (4 pairs) to get uPoE (PoE++, type 4, 90W maximum) functionality. I am extracting out the DC from the lines and doing the typical Bob-Smith configuration, etc. On the data side, however, is where I am a bit confused. I have a standard 10/100 MSP432E401Y microcontroller. I am unsure on what to do with the 4 remaining data lines on the PCB side. Do I terminate them somehow, pull them to ground, or leave them open?

Here is the post from which I was directed to the Interface division.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1340903/tps2372-using-4-pair-ethernet-magnetics-to-achieve-poe-but-with-a-10-100-msp432e401y

Thank you!