11.1.7.11.1 Ethernet MAC MDIO Mode

In MDIO mode, the MDC frequency must be less than or equal to 2.5 MHz to be compatible with the IEEE 802.3 MII specification.

Timings are provided in the following conditions:
  • 1.8V domain: VDDIO from 1.7V to 1.9V, maximum external capacitor = 10 pF, DRV= 1, SR = 1
  • 3.3V domain: VDDIO from 3.0V to 3.6V, maximum external capacitor = 10 pF, DRV= 0, SR = 1
Table 11-41. Ethernet MAC MDIO Interface Timings
SymbolParameterMinMaxUnit
GMAC1MDIO input data setup time before MDC rising edge10–ns
GMAC2MDIO input data hold time after MDC rising edge0–ns
GMAC3MDC falling edge to MDIO output data valid025ns
Figure 11-39. Ethernet MAC MDIO Interface Timings