LU82551ER 860613 Intel, LU82551ER 860613 Datasheet - Page 42

• Manufacturer Part Number: LU82551ER 860613
• Manufacturer: Intel

Specifications of LU82551ER 860613

• Lead Free Status / Rohs Status: Supplier Unconfirmed

82551ER — Networking Silicon
5.7
34
Media Independent Interface (MII) Management Interface
The MII management interface allows the CPU to control the PHY unit through a control register
in the 82551ER. This allows the software driver to place the PHY in specific modes such as full
duplex, loopback, power down, etc., without the need for specific hardware pins to select the
desired mode. This structure allows the 82551ER to query the PHY unit for status of the link. This
register is the MDI Control Register and resides at offset 10h in the 82551ER CSR. (The MDI
registers are described in detail in
to this register and the 82551ER reads or writes the control/status parameters to the PHY unit
through the MDI register. Although the 82551ER follows the MII format, the MI bus is not
accessible on external pins.
Section 9.0, “PHY Unit
Registers”.) The CPU writes commands
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