07-10-2018 11:00 PM
I need to connect Zynq 7 to a enthernet PHY, and have two questions:
07-11-2018 07:45 PM
1. Yes. MDIO should work as long as the voltages are compatible.
2. No. RGMII termination resistors may be needed at 1Gb/s, but you won't have problems at 100Mb/s.
Whilst that answers the questions you asked, it doesn't touch the question you didn't ask, which is how do you expect to connect RGMII to a PHY (such as DP83640) that doesn't support that interface?
I suggest either: