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KSZ9031MNX

Gigabit Ethernet Transceiver with GMII/MII Support

Micrel 

Micrel, Inc.

KSZ9031MNX

Contents

General Description ................................................................................................................................................................ 1

Features .................................................................................................................................................................................. 1

Functional Diagram ................................................................................................................................................................. 1

Features (Continued) .............................................................................................................................................................. 2

Applications ............................................................................................................................................................................. 2

Ordering Information ............................................................................................................................................................... 2

Revision History ...................................................................................................................................................................... 3

Contents .................................................................................................................................................................................. 4

List of Figures.......................................................................................................................................................................... 7

List of Tables ........................................................................................................................................................................... 8

Pin Configuration..................................................................................................................................................................... 9

Pin Description ...................................................................................................................................................................... 10

Strapping Options ................................................................................................................................................................. 16

Functional Overview.............................................................................................................................................................. 17

Functional Description: 10Base-T/100Base-TX Transceiver ................................................................................................ 18

100Base-TX Transmit.......................................................................................................................................................................... 18

100Base-TX Receive........................................................................................................................................................................... 18

Scrambler/De-Scrambler (100Base-TX only) ...................................................................................................................................... 18

10Base-T Transmit .............................................................................................................................................................................. 18

10Base-T Receive ............................................................................................................................................................................... 18

Functional Description: 1000Base-T Transceiver ................................................................................................................. 19

Analog Echo-Cancellation Circuit ........................................................................................................................................................ 19

Automatic Gain Control (AGC) ............................................................................................................................................................ 19

Analog-to-Digital Converter (ADC) ...................................................................................................................................................... 20

Timing Recovery Circuit ...................................................................................................................................................................... 20

Adaptive Equalizer............................................................................................................................................................................... 20

Trellis Encoder and Decoder ............................................................................................................................................................... 20

Functional Description: Additional 10/100/1000 PHY Features ............................................................................................ 20

Pair-Swap, Alignment, and Polarity Check .......................................................................................................................................... 21

Wave Shaping, Slew-Rate Control, and Partial Response .................................................................................................................. 21

PLL Clock Synthesizer ........................................................................................................................................................................ 21

Auto-Negotiation ................................................................................................................................................................... 21

GMII Interface........................................................................................................................................................................ 23

GMII Signal Definition .......................................................................................................................................................................... 24

GMII Signal Diagram ........................................................................................................................................................................... 24

MII Interface .......................................................................................................................................................................... 25

MII Signal Definition............................................................................................................................................................................. 26

MII Signal Diagram .............................................................................................................................................................................. 26

MII Management (MIIM) Interface......................................................................................................................................... 27

Interrupt (INT_N) ................................................................................................................................................................... 27

October 2012

4

M9999-103112-1.0

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