KSZ8993M データシートの表示（PDF） - Micrel

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KSZ8993M

Integrated 3-Port 10/100 Managed Switch with PHYs

Micrel 

Micrel, Inc.

KSZ8993M/ML

Contents

List of Figures .........................................................................................................................................9

List of Tables...........................................................................................................................................9

Pin Description and I/O Assignment...................................................................................................10

Pin Configuration..................................................................................................................................20

Functional Description .........................................................................................................................21

Functional Overview: Physical Layer Transceiver ............................................................................21

100BASE-TX Transmit.........................................................................................................................................................21

100BASE-TX Receive ..........................................................................................................................................................21

PLL Clock Synthesizer........................................................................................................................................................22

Scrambler/De-scrambler (100BASE-TX Only) ...................................................................................................................22

100BASE-FX Operation.......................................................................................................................................................22

100BASE-FX Signal Detection............................................................................................................................................22

100BASE-FX Far End Fault.................................................................................................................................................22

10BASE-T Transmit .............................................................................................................................................................23

10BASE-T Receive ..............................................................................................................................................................23

Power Management.............................................................................................................................................................23

MDI /MDI-X Auto Crossover................................................................................................................................................23

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

Crossover Cable ............................................................................................................................................................25

Auto Negotiation .................................................................................................................................................................25

Functional Overview: MAC and Switch ..............................................................................................27

Address Lookup ..................................................................................................................................................................27

Learning ...............................................................................................................................................................................27

Migration ..............................................................................................................................................................................27

Aging ....................................................................................................................................................................................27

Forwarding ........................................................................................................................................................................... 27

Switching Engine ................................................................................................................................................................30

MAC Operation ....................................................................................................................................................................30

Inter Packet Gap (IPG) ..................................................................................................................................................30

Back-Off Algorithm.........................................................................................................................................................30

Late Collision .................................................................................................................................................................30

Illegal Frames ................................................................................................................................................................30

Flow Control...................................................................................................................................................................30

Half-Duplex Backpressure .............................................................................................................................................30

Broadcast Storm Protection ...........................................................................................................................................31

MII Interface Operation........................................................................................................................................................31

SNI (7-Wire) Operation ........................................................................................................................................................32

MII Management Interface (MIIM) .......................................................................................................................................32

Serial Management Interface (SMI) ....................................................................................................................................33

Advanced Switch Functions ................................................................................................................34

Spanning Tree Support.......................................................................................................................................................34

Upstream Special Tagging Mode .......................................................................................................................................35

IGMP Support ......................................................................................................................................................................36

“IGMP” Snooping ...........................................................................................................................................................36

“Multicast Address Insertion” in the Static MAC Table...................................................................................................36

Port Mirroring Support........................................................................................................................................................36

IEEE 802.1Q VLAN Support ................................................................................................................................................36

QoS Priority Support...........................................................................................................................................................37

Rate Limiting Support .........................................................................................................................................................39

Configuration Interface .......................................................................................................................................................39

I2C Master Serial Bus Configuration ..............................................................................................................................39

I2C Slave Serial Bus Configuration ................................................................................................................................40

SPI Slave Serial Bus Configuration ...............................................................................................................................40

Loopback Support...............................................................................................................................................................44

MII Management (MIIM) Registers .......................................................................................................45

October 2008

6

M9999-020606

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