KS8893ML MICREL [Micrel Semiconductor], KS8893ML Datasheet - Page 25
KS8893ML
Manufacturer Part Number
KS8893ML
Description
Integrated 3-Port 10/100 Managed Switch with PHYs Preliminary Data Sheet Rev. 1.0
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.KS8893ML.pdf
(106 pages)
- Current page: 25 of 106
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Crossover Cable
A crossover cable connects an MDI device to another MDI device, or an MDI-X device to another MDI-X device.
The following diagram shows a typical crossover cable connection between two switches or hubs (two MDI-X
devices).
Auto-Negotiation
The KS8893M conforms to the auto negotiation protocol, defined in Clause 28 of the IEEE 802.3u specification.
Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation.
In auto-negotiation, link partners advertise their capabilities across the link to each other. If auto-negotiation is not
supported or the KS8893M link partner is forced to bypass auto-negotiation, the KS8893M sets its operating
mode by observing the signal at its receiver. This is known as parallel detection, and allows the KS8893M to
establish link by listening for a fixed signal protocol in the absence of auto-negotiation advertisement protocol.
The link up process is shown in the following flow diagram.
June 2005
Media Dependent Interface
Modular Connector (RJ-45)
Transmit Pair
Receive Pair
(Repeater or Switch)
10/100 Ethernet
HUB
Figure 2. Typical Crossover Cable Connection
1
2
3
4
5
6
7
8
Crossover
Cable
25
Media Dependent Interface
Modular Connector (RJ-45)
(Repeater or Switch)
1
2
3
4
5
6
7
8
10/100 Ethernet
Transmit Pair
HUB
Receive Pair
M9999-063005
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