Dear support,
I am using two DP83825i phy with common SMI interface connected to an FPGA.
PHY1: address set to 0
PHY2: address set to 2
MDC clock frequency: ~100KHz
I am testing the SMI interface by reading the PHYIDR2 register.
From address 2, i got no answer. (the phy not even try to pull down the line)
From address 0, i got answer only every tenth attempt. I see no difference with oscilloscope in the signal integrity when i got answer or not.
There is one of the simulation timing, measured on hardware as well:
If you have any suggestion to debug the problem I would be grateful.