When interfacing a I219LM to a 10/100 PHY, is it acceptable to leave the unused pairs as no connects, or is some manner of termination (Bob Smith?) required?
Yes, I'm connecting an I219LM to a 10/100 port on another switch (Microchip KSZ8862) so I'll only need the two pairs for the 10/100, but I'm unsure of how to terminate the other (unused) 2 data pairs (since I don't intend to run them through any magnetics, since they won't ultimately be connected.) Can I just N/C them, or is there a recommended termination circuit?
Thank you for the reply. Just to double check are you referring you are trying to find out how to wire the cable in order to connect only at only 10/100 mbps?
Thank you for the reply. Just to clarify so you are trying to connect the I219LM ethernet controller to a PCB? What is the board you are using? Are you trying to design a board? Looking forward to your reply. Thank you.
Thank you for the clarification. As this is with regards to new PCB design, it is recommended to contact our embedded design support team. You may post your inquiry at
https://embedded.communities.intel.com/ for them to better assist you.