ZHCSBT2G November 2012 – October 2017 66AK2H06 , 66AK2H12 , 66AK2H14
PRODUCTION DATA.
The management data input/output (MDIO) module implements the 802.3 serial management interface to interrogate and control up to 32 Ethernet PHY(s) connected to the device, using a shared two-wire bus. Application software uses the MDIO module to configure the auto-negotiation parameters of each PHY attached to the EMAC, retrieve the negotiation results, and configure required parameters in the gigabit Ethernet (GbE) and 10-gigabit Ethernet (10GbE) switch subsystems for correct operation. The module allows almost transparent operation of the MDIO interface, with very little attention from the SoC. For more information, see the Gigabit Ethernet (GbE) Switch Subsystem (1 GB) User's Guide and the KeyStone II Architecture 10 Gigabit Ethernet Subsystem User's Guide.
The MDIO timing requirements are shown in Table 11-49 and the MDIO switching characteristics are shown in Table 11-50.