ksz8051mlli Micrel Semiconductor, ksz8051mlli Datasheet - Page 22

• Manufacturer Part Number: ksz8051mlli
• Description: 10base-t/100base-tx Physical Layer Transceiver
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Crossover Cable
A crossover cable connects a MDI device to another MDI device, or a MDI-X device to another MDI-X device. Figure 5
depicts a typical crossover cable connection between two switches or hubs (two MDI-X devices).
LinkMD
The LinkMD
such as open circuits, short circuits and impedance mismatches.
LinkMD
shape of the reflected signal to determine the type of fault. The time duration for the reflected signal to return provides the
approximate distance to the cabling fault. The LinkMD
numerical value that can be translated to a cable distance.
LinkMD
PHY Control 2 Register. The latter register is used to disable auto MDI/MDI-X and to select either MDI or MDI-X as the
cable differential pair for testing.
July 2010
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works by sending a pulse of known amplitude and duration down the MDI or MDI-X pair, and then analyzing the
is initiated by accessing register 1Dh, the LinkMD
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Cable Diagnostics
function utilizes time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems,
Figure 5. Typical Crossover Cable Connection
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function processes this TDR information and presents it as a
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Control/Status Register, in conjunction with register 1Fh, the
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M9999-071210-1.0
KSZ8051MLL