I am using a Nucelo-429zi board for development and my custom PCB schematic is based on this board. I am experiencing a problem where about 10% - 20% of the time after a hardware reset the PHY will fail auto-negotiation. The green led does not come on and the amber led blinks. This happens even when on the debugger and the MCU is not allowed to run. I only have one Nucleo board so I cannot try another to see if the problem is unique to this board.
Is this a known problem? seen before?
What could it be? Possibly the clock circuit?
