KS8993 Просмотр технического описания (PDF) - Micrel

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KS8993

3-Port 10/100 Integrated Switch with PHY and Frame Buffer

Micrel 

KS8993

Micrel

Table of Contents

System Level Applications .............................................................................................................................................................. 5

Pin Description .............................................................................................................................................................................. 6

I/O Grouping .............................................................................................................................................................................. 9

I/O Descriptions ............................................................................................................................................................................ 10

Pin Configuration ........................................................................................................................................................................... 15

Functional Overview: Physical Layer Transceiver ..................................................................................................................... 16

100BaseTX Transmit ............................................................................................................................................................... 16

100BaseTX Receive ................................................................................................................................................................ 16

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

Scrambler/De-scrambler (100BaseTX only) ............................................................................................................................ 16

100BaseFX operation .............................................................................................................................................................. 16

100BaseFX Signal Detection ................................................................................................................................................... 16

100BaseFX Far End Fault ....................................................................................................................................................... 16

10BaseT Transmit ................................................................................................................................................................... 16

10BaseT Receive .................................................................................................................................................................... 16

Power Management ................................................................................................................................................................ 17

LED Mode Selection ................................................................................................................................................................ 17

Auto-Negotiation ...................................................................................................................................................................... 17

Functional Overview: Switch Core ............................................................................................................................................... 18

Address Look Up ..................................................................................................................................................................... 18

Learning .......................................................................................................................................................................... 18

Migration ......................................................................................................................................................................... 18

Aging ............................................................................................................................................................................ 18

Forwarding ...................................................................................................................................................................... 18

Switching Engine ..................................................................................................................................................................... 18

MAC (Media Access Controller) Operation ............................................................................................................................. 18

Inter Packet Group .......................................................................................................................................................... 18

Back off Algorithm ........................................................................................................................................................... 18

Late Collision .................................................................................................................................................................. 18

Illegal Frame ................................................................................................................................................................... 18

Flow Control .................................................................................................................................................................... 18

Full-Duplex Flow Control ................................................................................................................................................. 18

Half-Duplex Back Pressure ............................................................................................................................................. 18

VLAN Support .......................................................................................................................................................................... 19

QoS Priority Support ................................................................................................................................................................ 20

MII Interface Operation .................................................................................................................................................................. 21

SNI Interface (7-wire) Operation ................................................................................................................................................... 22

Absolute Maximum Ratings .......................................................................................................................................................... 23

Operating Ratings .......................................................................................................................................................................... 23

Electrical Characteristics .............................................................................................................................................................. 23

Timing Diagrams ............................................................................................................................................................................ 24

Reference Circuit ........................................................................................................................................................................... 29

4B/5B Coding ............................................................................................................................................................................ 31

MLT Coding

............................................................................................................................................................................ 32

802.1q VLAN and 802.1p Priority Frame ...................................................................................................................................... 33

Selection of Isolation Transformers ............................................................................................................................................. 34

Selection of Reference Crystals ................................................................................................................................................... 34

Package Outline and Dimensions ................................................................................................................................................ 35

KS8993

4

May 2005

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