Forum Discussion
Altera_Forum
Honored Contributor
13 years agoYou decide which Ethernet interface you need. Then from that you select a PHY, and then you look at how you want to connect it to your FPGA. Different PHYs with different Ethernet protocols supports have different interfaces to the MAC, using more or less pins. The more pins you use, the lower the frequency and the easier it is to interface with the FPGA, usually.