I am interested in a 100BaseFX ethernet phy which will allow me to select MII TX clock (for transmitting data to the fiber) and Crystal clock (needed for fiber data and RX clock recovery and for internal operation of the phy) to be independent. The Tx clock may be derived from an external source not synchronized with the crystal clock. And the MII RX clock again may be independent of these two, based on the partner phy. The application is to form a full duplex bi-directional ring from ethernet links in which there will be one master and others as slave for each direction, and it should be possible to select the clock master separately for each direction, clockwise as well as anticlockwise. I may synchronize clocking in both the direction to each other or I may not.
Regards
Thnaks
