DP83848J data sheet reference to IEEE 68 ohm bus impedance. (section7.2.2.1)
1) Is this spec the differential impedance? Why not 50 ohms?
2) Does this spec apply if RMII is implemented?
3) Is this the impedance I need to have the PCB traces designed to?
4) I am trying to design an application using this chip in RMII mode. While I have a design to copy, I am not sure it was done correctly and would like to confirm some of the things I am seeing/reading.
