I am using a 1000/100/10M PHY layer(DP83865) to implement 100M ethernet,
and I want to use XPS_ethernetlite IP to implement MAC protocol
I know XPS_ethernetlite is a 100/10M MAC IP,so I config DP83865 to work under the 100M mode,
but now, the ether con't TX or RX any data
I doubt whether XPS_ethernetlite support the 1000/100/10M PHY layer(DP83865)?
Its true that DP83865 is a gigabit PHY and ethernetlite is capable of supporting 100/10 M but still while establishing link MAC doesn't come into picture.
And the link is established at the best possible speed i.e. 100 Mbps in your case.
When MAC is configured for 100 Mbps it will support, the only thing that you have to monitor is that you have to write your own code for link establishment and data transfer in case of DP83865.
Some setting may be wrong in the PHY registers or in the code otherwise it should work.