Why is the MII 100M Latency spec just a max value with no variation?
Thank you for your interest on ADIN1300 product of Analog Devices.
The Latency in MII mode is a fixed number, dependent on clock cycles. There is no FIFO in MII and therefore no variation on this figure. For 1000M mode, there is a FIFO and there will be an 8ns uncertainty, this is captured in the datasheet latency specs.