The 1000BASE-X or 1G SGMII standard of the core can be switched at any time by writing to the Dynamic Switching Register 17 (see Configuration and Status Vectors). Following completion of this write, the MDIO management registers immediately switch.
- Core set to 1000BASE-X standard. Management registers 0 through 16 should be interpreted according to 1000BASE-X or 2500BASE-X Standard Using Optional Auto-Negotiation.
- Core set to SGMII standard. Management registers 0 through 16 should be interpreted according to SGMII Standard Using Optional Auto-Negotiation.