Regarding MII spec, I have a question about the RX_DV signal that I'm not able to find elsewhere: From the perspective of the Ethernet MAC, when sending a frame to a PHY over MII, does the RX_DV (Data Valid) signal have to stay HIGH/asserted for the entire frame, or can it go LOW and back HIGH again on the same frame (and still be interpreted as 1 frame by the PHY)?
I guess another way of asking is: does an MII PHY use the RX_DV as a delimiter for individual frames, or does it check the SOF byte of something else to distinguish frames?
Any help is appreciated