KSZ8091MLX Datasheet, PDF(4/72 Page) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

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KSZ8091MLX Datasheet, PDF (4/72 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

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Micrel, Inc.

KSZ8091MLX

Contents

List of Figures.......................................................................................................................................................................... 6

List of Tables ........................................................................................................................................................................... 7

Pin Configuration..................................................................................................................................................................... 8

Pin Description ........................................................................................................................................................................ 9

Strapping Options ................................................................................................................................................................. 13

Functional Description: 10Base-T/100Base-TX Transceiver ................................................................................................ 15

100Base-TX Transmit........................................................................................................................................................ 15

100Base-TX Receive......................................................................................................................................................... 15

Scrambler/De-Scrambler (100Base-TX Only) ................................................................................................................... 15

10Base-T Transmit ............................................................................................................................................................ 15

10Base-T Receive ............................................................................................................................................................. 16

SQE and Jabber Function (10Base-T Only)...................................................................................................................... 16

PLL Clock Synthesizer ...................................................................................................................................................... 16

Auto-Negotiation ................................................................................................................................................................ 16

MII Data Interface.................................................................................................................................................................. 18

MII Signal Definition........................................................................................................................................................... 18

Transmit Clock (TXC) .................................................................................................................................................... 18

Transmit Enable (TXEN)................................................................................................................................................ 18

Transmit Data[3:0] (TXD[3:0])........................................................................................................................................ 19

Transmit Error (TXER) ................................................................................................................................................... 19

Receive Clock (RXC) ..................................................................................................................................................... 19

Receive Data Valid (RXDV) ........................................................................................................................................... 19

Receive Data[3:0] (RXD[3:0]) ........................................................................................................................................ 19

Receive Error (RXER).................................................................................................................................................... 19

Carrier Sense (CRS) ...................................................................................................................................................... 20

Collision (COL)............................................................................................................................................................... 20

MII Signal Diagram ............................................................................................................................................................ 20

Back-to-Back Mode â 100Mbps Copper Repeater ............................................................................................................... 21

MII Back-to-Back Mode ..................................................................................................................................................... 21

MII Management (MIIM) Interface......................................................................................................................................... 22

Interrupt (INTRP)................................................................................................................................................................... 23

HP Auto MDI/MDI-X .............................................................................................................................................................. 23

Straight Cable .................................................................................................................................................................... 23

Crossover Cable ................................................................................................................................................................ 24

Loopback Mode..................................................................................................................................................................... 24

Local (Digital) Loopback .................................................................................................................................................... 24

Remote (Analog) Loopback............................................................................................................................................... 25

LinkMDÂ® Cable Diagnostic .................................................................................................................................................... 27

NAND Tree Support .............................................................................................................................................................. 27

NAND Tree I/O Testing ..................................................................................................................................................... 28

Power Management .............................................................................................................................................................. 29

Power-Saving Mode .......................................................................................................................................................... 29

Energy-Detect Power-Down Mode .................................................................................................................................... 29

Power-Down Mode ............................................................................................................................................................ 29

Slow-Oscillator Mode......................................................................................................................................................... 29

Efficient Ethernet (EEE) ........................................................................................................................................................ 30

Transmit Direction Control (MAC-to-PHY) ........................................................................................................................ 30

Receive Direction Control (PHY-to-MAC) ......................................................................................................................... 31

Registers Associated with EEE ......................................................................................................................................... 31

August 31, 2015

Revision 1.2

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