JAJSLL2B April 2021 – November 2021 DP83561-SP
PRODUCTION DATA
DP83561-SP 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 0x9 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-TX and 10BASE-Te modes. The MII is fully compliant with IEEE 802.3-2002 clause 22.
When using the PHY in 10/100M MII Auto-negotiation mode, it is required to disable 1G advertisement by writing register 0x9 = 0x0.
The MII signals are summarized in Table 7-1:
FUNCTION | PINS |
---|---|
Data Signals | TX_D[3:0] |
RX_D[3:0] | |
Transmit and Receive Signals | TX_EN, TX_ER |
RX_DV, RX_ER |