Note: I also posted this to c.a.embedded. I'm not sure it belongs here, but no answers there so far...
In putting together a little control nodule w/ a single 10/100 ethernet port, I started wondering if I need to pay any attention to the RMII. IIRC (& it seems that there is not much that I do anymore), I built some working 10Mbit - realtek based - boards w/o ever paying any attention to RMII.
However, somewhere I read that this spec defines communications between the MAC & the PHY.
Again, using the realtek (8019as) chip (or even national chips) reads & writes occurred over DMA between the chips & a PIC. Do I have to pay attention to RMII only on multiple (hub or switch) eth port configurations or always? If someone can clear this up for me, I'd appreciate it.