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- Media_Independent_Interface abstract "The Media Independent Interface (MII) was originally defined as a standard interface used to connect a Fast Ethernet (i.e., 100 Mbit/s) MAC-block to a PHY chip.The MII design has been extended to support reduced signals and increased speeds. Current variants are Reduced Media Independent Interface, Gigabit Media Independent Interface, Reduced Gigabit Media Independent Interface, Serial Gigabit Media Independent Interface, 10 Gigabit Media Independent Interface, XAUI, GBIC, SFP, SFF, XFP, and XFI.The equivalent of MII for 10 megabit Ethernet is the Attachment Unit Interface.Being media independent means that different types of PHY devices for connecting to different media (i.e. Twisted pair copper, fiber optic, etc.) can be used without redesigning or replacing the MAC hardware. The MII bus (standardized by IEEE 802.3u) connects different types of PHYs (Physical Transceivers) to Media Access Controllers (MAC). Thus any MAC may be used with any PHY, independent of the network signal transmission media. The MII bus transfers data using 4-bit words (nibble) in each direction (4 transmit data bits, 4 receive data bits). The data is clocked at 25 MHz to achieve 100 Mbit/s speed.The MII can be used to connect a MAC to an external PHY using a pluggable connector (shown in the figure (extreme right)), or direct to a PHY chip which is on the same PCB. On a PC the CNR connector Type B carries MII bus interface signals.The MDIO Serial Management Interface (SMI) is used to transfer management information between MAC and PHY. At powerup the PHY usually adapts to whatever it's connected to (Auto-negotiation) unless you alter settings via the MDIO interface.The standard MII features a small set of registers: Basic Mode Configuration (#0) Status Word (#1) PHY Identification (#2, #3) Ability Advertisement (#4) Link Partner Ability (#5) Auto Negotiation Expansion (#6)The MII Status Word is the most useful datum, since it may be used to detect whether an Ethernet NIC is connected to a network. It contains a bitmask with the following meaning:0x8000 Capable of 100baseT40x7800 Capable of 10/100 HD/FD (most common)0x0040 Preamble suppression permitted0x0020 Autonegotiation complete0x0010 Remote fault0x0008 Capable of Autonegotiation0x0004 Link established0x0002 Jabber detected0x0001 Extended MII register exist.A more detailed reference on registers exported by MII-compatible PHY'scan be found looking at the Linux MII interface definition include/linux/mii.h".
- Media_Independent_Interface thumbnail Media_independent_interface_(mii)_connector_on_sun_ultra_1.jpg?width=300.
- Media_Independent_Interface wikiPageExternalLink sgmii.pdf.
- Media_Independent_Interface wikiPageExternalLink smii.pdf.
- Media_Independent_Interface wikiPageExternalLink DP83848C.pdf.
- Media_Independent_Interface wikiPageExternalLink mii.h.
- Media_Independent_Interface wikiPageExternalLink ref-10gbe.html.
- Media_Independent_Interface wikiPageExternalLink sgmii.pdf.
- Media_Independent_Interface wikiPageExternalLink RGMIIv2_0_final_hp.pdf.
- Media_Independent_Interface wikiPageExternalLink AIgmitim.pdf.
- Media_Independent_Interface wikiPageExternalLink AN-1405.pdf.
- Media_Independent_Interface wikiPageExternalLink sgmii.php.
- Media_Independent_Interface wikiPageID "1296493".
- Media_Independent_Interface wikiPageRevisionID "604109935".
- Media_Independent_Interface hasPhotoCollection Media_Independent_Interface.
- Media_Independent_Interface subject Category:Computer_buses.
- Media_Independent_Interface subject Category:Ethernet.
- Media_Independent_Interface subject Category:Serial_buses.
- Media_Independent_Interface type Artifact100021939.
- Media_Independent_Interface type Bus102924116.
- Media_Independent_Interface type Conveyance103100490.
- Media_Independent_Interface type Instrumentality103575240.
- Media_Independent_Interface type Object100002684.
- Media_Independent_Interface type PhysicalEntity100001930.
- Media_Independent_Interface type PublicTransport104019101.
- Media_Independent_Interface type SerialBuses.
- Media_Independent_Interface type Whole100003553.
- Media_Independent_Interface comment "The Media Independent Interface (MII) was originally defined as a standard interface used to connect a Fast Ethernet (i.e., 100 Mbit/s) MAC-block to a PHY chip.The MII design has been extended to support reduced signals and increased speeds.".
- Media_Independent_Interface label "MII (luchtschip)".
- Media_Independent_Interface label "MII".
- Media_Independent_Interface label "Media Independent Interface".
- Media_Independent_Interface label "Media Independent Interface".
- Media_Independent_Interface label "Media Independent Interface".
- Media_Independent_Interface label "Media Independent Interface".
- Media_Independent_Interface sameAs Media_Independent_Interface.
- Media_Independent_Interface sameAs MII_(luchtschip).
- Media_Independent_Interface sameAs Media_Independent_Interface.
- Media_Independent_Interface sameAs m.04qsrw.
- Media_Independent_Interface sameAs Q1468650.
- Media_Independent_Interface sameAs Q1468650.
- Media_Independent_Interface sameAs Media_Independent_Interface.
- Media_Independent_Interface wasDerivedFrom Media_Independent_Interface?oldid=604109935.
- Media_Independent_Interface depiction Media_independent_interface_(mii)_connector_on_sun_ultra_1.jpg.
- Media_Independent_Interface isPrimaryTopicOf Media_Independent_Interface.
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