KSZ9021GN View Datasheet(PDF) - Micrel

Part Name

Description

Manufacturer

KSZ9021GN

Gigabit Ethernet Transceiver with GMII / MII Support

Micrel 

Micrel, Inc.

KSZ9021GN

Contents

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

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

Strapping Options ............................................................................................................................................................ 14

Functional Overview ........................................................................................................................................................ 15

Functional Description: 10Base-T/100Base-TX Transceiver ...................................................................................... 16

100Base-TX Transmit.................................................................................................................................................... 16

100Base-TX Receive..................................................................................................................................................... 16

Scrambler/De-scrambler (100Base-TX only)................................................................................................................. 16

10Base-T Transmit ........................................................................................................................................................ 16

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

Functional Description: 1000Base-T Transceiver........................................................................................................ 17

Analog Echo Cancellation Circuit .................................................................................................................................. 17

Automatic Gain Control (AGC) ...................................................................................................................................... 17

Analog-to-Digital Converter (ADC) ................................................................................................................................ 17

Timing Recovery Circuit................................................................................................................................................. 18

Adaptive Equalizer ......................................................................................................................................................... 18

Trellis Encoder and Decoder ......................................................................................................................................... 18

Functional Description: Additional 10/100/1000 PHY Features.................................................................................. 18

Auto MDI/MDI-X............................................................................................................................................................. 18

Pair- Swap, Alignment, and Polarity Check................................................................................................................... 19

Wave Shaping, Slew Rate Control and Partial Response............................................................................................. 19

PLL Clock Synthesizer................................................................................................................................................... 19

Auto-Negotiation .............................................................................................................................................................. 19

GMII Interface.................................................................................................................................................................... 21

GMII Signal Definition .................................................................................................................................................... 22

GMII Signal Diagram ..................................................................................................................................................... 22

MII Interface ...................................................................................................................................................................... 23

MII Signal Definition....................................................................................................................................................... 24

MII Signal Diagram ........................................................................................................................................................ 24

MII Management (MIIM) Interface.................................................................................................................................... 25

Interrupt (INT_N)............................................................................................................................................................... 25

LED Mode.......................................................................................................................................................................... 25

Single LED Mode ........................................................................................................................................................... 26

Tri-color Dual LED Mode ............................................................................................................................................... 26

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

Power Management ......................................................................................................................................................... 28

Power Saving Mode....................................................................................................................................................... 28

Software Power Down Mode ......................................................................................................................................... 28

Chip Power Down Mode ................................................................................................................................................ 28

Register Map..................................................................................................................................................................... 29

Register Description ........................................................................................................................................................ 30

IEEE Defined Registers ................................................................................................................................................. 30

Vendor Specific Registers ............................................................................................................................................. 36

Extended Registers ....................................................................................................................................................... 39

September 2010

4

M9999-091010-1.1

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