Customer is using the DP83867IS, that supports both RGMII and SGMII. They have seen that for the RGMII inputs, pins 27 and 28 slow down the input signal more than pins 25 and 26. This is even with SGMII disabled. Attached are measured signals for each and you will see that the dual purpose pins slow the signal to 2.1ns edge rates while the RGMII only pins are at 1.4ns. Any thoughts on what could be causing this?
Regards,
Mark
