SNLS614A September 2018 – December 2018 DP83869HM
DP83869HM also supports MII mode when the PHY is working in 100M and 10M speeds. The user will have to ensure that the PHY links in either 100-Mbps or 10-Mbps mode. MII mode cannot be used in 1000-Mbps mode. When using auto-negotiation to resolve MDI speed, TI recommends to turn off the gigabit speed advertisement through register 0x0009 to ensure that the PHY does not link up at 1000-Mbps speed. The Media Independent Interface is a synchronous 4-bit wide nibble data interface that connects the PHY to the MAC in 100BASE-FX, 100BASE-TX and 10BASE-Te modes. The MII is fully compliant with IEEE 802.3-2002 clause 22.
The MII signals are summarized in Table 7:
|Transmit and Receive Signals||TX_EN, TX_ER|