KSZ8721SL A4 Micrel Inc, KSZ8721SL A4 Datasheet - Page 15
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KSZ8721SL A4
Manufacturer Part Number
KSZ8721SL A4
Description
Manufacturer
Micrel Inc
Datasheet
1.KSZ8721SL_A4.pdf
(34 pages)
Specifications of KSZ8721SL A4
Lead Free Status / RoHS Status
Compliant
Auto-Crossover (Auto-MDI/MDI-X)
Automatic MDI/MDI-X configuration is intended to eliminate the need for crossover cables between similar devices. The
assignment of pinouts for a 10/100 BASE-T crossover function cable is shown below.
This feature eliminates the confusion in applications by allowing the use of both straight and crossover cables. This feature
is controlled by register 1f:13. See “Register 1fh–100BASE-TX PHY Controller” section for details.
February 2005
KS8721BL/SL
Modular Connector (RJ45)
10/100 BASE-T
Media Dependent Interface
Receive Pair
Transmit Pair
(Repeater or Switch)
10/100 BASE-T
Media Dependent Interface
Transmit Pair
Receive Pair
Modular Connector
HUB
(RJ45)
NIC
Figure 1. Straight Through Cable
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Figure 2. Crossover Cable
15
10/100 BASE-T
Media Dependent Interface
Modular Connector (RJ45)
10/100 BASE-T
Media Dependent Interface
(Repeater or Switch)
Modular Connector
1
2
3
4
5
6
7
8
(Repeater or Switch)
1
2
3
4
5
6
7
8
(RJ45)
Transmit Pair
HUB
Receive Pair
Transmit Pair
Receive Pair
HUB
M9999-022105
Micrel