We need an Ethernet interface to a RGMII, but we don't need gigabit speed. The 10/100 interface is fine in regards to speed, but we have the constraint on the controller/FPGA side of the PHY to interface to a RGMII. We have very limited PCB space and since the gigabit PHY magnetics tend to have a rather large board footprint, we would like to know if we can somehow use 10/100 PHY magnetics in place of the 10/100/1000 PHY magnetics. This may not be possible, but I need to ask.
Thank You,
Andrew Gallardo