Management Data Input/Output

MDIO Description




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Ethernet Bus MDIO Interface

The MDIO interface is a simple, two-wire, serial interface to connect a management entity and a managed PHY for the purposes of controlling the PHY and gathering status from the PHY. The two lines include the MDC line [Management Data Clock], and the MDIO line [Management Data Input/Output]. The clock is point-to-point, while the data line is a bi-directional multi-drop interface. The data line is Tri-statable and can drive 32 devices.

The MDIO interface is found on a number of devices, and is also a part of the Ethernet Bus MII Interface

Back to the 10/100 Base Ethernet page, or 1000 base Ethernet page for additional pinout tables and interface descriptions.

Electrical Engineering Design Key words: Ethernet Bus, MDIO, MII, Interface, Media-independent interface, Physical Layer, Electrical layers, Physical, Mechanical, Type, Description, Brief, specification, Personal Computer, NICK card, CSMA, LAN, IEEE802.3

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Last Modified 2/16/08
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