I have a single board including both PCIe reference clock generator (Abracon AB-557-03) and Intel 82580 ethernet controller.
In this configuration without add-in card, is it a best practice to add 100 ohms termination resistor close to the 82580 input (PE_CLK) ?
Is there internal termination resistor configurable by one of the 82580 registers ?
Thank you for posting in Intel Ethernet Communities.
Regarding your inquiry, you may contact the manufacturer of the motherboard since you are using an on-board NIC.
At the same time, I will a also route this thread to our embedded team for them to further assist you.
If you have questions, please let us know.
Intel Customer Support Technicians
A Contingent Worker at Intel
Thanks for your support.
We are the motherboard manufacturer. We looked at the 82580 reference design and there is no termination.
The question is do we add terminaison depending on the distance between our clock generator and the 82580 reference clock input to improve if needed the signal integrity.
Is there an integrated terminaison inside the 82580 - fixed or configurable by software ?
Here are the documents:
Our design has not been verified by Intel.
Thanks and best regards,
Thanks for your reply.
Your implementation can be verified by Intel if you follow the steps stated at: