We've designed a new board with the DP83620 connected to the Micrel KSZ8873MML port 1.
When the reset and the powerdown signal are de-asserted, I can see a pulse on the MDI interface that look like the auto-negotiation pulse. No link is created when I connect it to another Ethernet device. (laptop)
I've tried to force the link to 100Mbps Full duplex and the only behavior that I got is tx pair now showing active link. Nothing on the RX.
During all this, the MII bus is idle and even TX_CLK and RX_CLK are low. We don't have any communication on the MDIO bus.
I've included the schematic page.
Is there any initialization that need to be done thru MDIO? Is there a missing strapping resistor?