9 | | Each PHY also has a dedicated MDIO port for exchanging configuration information with the Ethernet MAC. Each MDIO port is connected to dedicated FPGA pins for totally independent operation of the two interfaces. MDIO access requires a 5-bit address, which is different for the two PHYs: |
| 9 | Each PHY also has a dedicated MDIO port for exchanging configuration information with the Ethernet MAC. Each MDIO port is connected to dedicated FPGA pins for totally independent operation of the two interfaces. MDIO access requires a 5-bit address. It is important to use the correct PHY address when accessing registers via MDIO. You should not use address 0, the MDIO broadcast address, to avoid conflicts with Ethernet circuits inside the FPGA that may respond to broadcast MDIO transactions. |
| 10 | |
| 11 | The hard-coded PHY addresses on WARP v3 are: |