ksz8893mqlam Micrel Semiconductor, ksz8893mqlam Datasheet - Page 32
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ksz8893mqlam
Manufacturer Part Number
ksz8893mqlam
Description
Integrated 3-port 10/100 Managed Switch With Phys
Manufacturer
Micrel Semiconductor
Datasheet
1.KSZ8893MQLAM.pdf
(116 pages)
- Current page: 32 of 116
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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 KSZ8893MQL/MBL 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 KSZ8893MQL/MBL link partner is forced to bypass auto-negotiation, the KSZ8893MQL/MBL
sets its operating mode by observing the signal at its receiver. This is known as parallel detection, and allows the
KSZ8893MQL/MBL 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.
December 2007
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
32
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
M9999-121007-1.5
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