KSZ8993M-EVAL Micrel Inc, KSZ8993M-EVAL Datasheet - Page 25

• Manufacturer Part Number: KSZ8993M-EVAL
• Description: KSZ8993M Evaluation Board - For Experimental Use Only
• Manufacturer: Micrel Inc

Specifications of KSZ8993M-EVAL

• Lead Free Status / RoHS Status: Supplier Unconfirmed

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 KSZ8993M conforms to the auto negotiation protocol as described by the 802.3 committee. Auto negotiation
allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In auto
negotiation, the link partners advertise capabilities across the link to each other. If auto negotiation is not
supported or the link partner to the KSZ8993M is forced to bypass auto negotiation, then the mode is set by
observing the signal at the receiver. This is known as parallel mode because while the transmitter is sending auto
negotiation advertisements, the receiver is listening for advertisements or a fixed signal protocol.
The link setup is shown in the following flow diagram.
Micrel, Inc.
October 2008
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
M9999-020606
KSZ8993M/ML