KSZ8999 データシートの表示（PDF） - Micrel

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KSZ8999

Integrated 9-Port 10/100 Switch with PHY and Frame Buffer

Micrel 

Micrel, Inc.

KS8999

Contents

System Level Applications.............................................................................................................................................6

Pin Configuration ............................................................................................................................................................7

Pin Description ................................................................................................................................................................8

I/O Grouping ..................................................................................................................................................................14

I/O Description...............................................................................................................................................................14

Functional Overview: Physical Layer Transceiver ....................................................................................................19

100BaseTX Transmit ................................................................................................................................................19

100BaseTX Receive .................................................................................................................................................19

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

Scrambler/De-scrambler (100BaseTX only).............................................................................................................19

100BaseFX Operation ..............................................................................................................................................19

100BaseFX Signal Detection....................................................................................................................................19

100BaseFX Far End Fault ........................................................................................................................................19

10BaseT Transmit ....................................................................................................................................................19

10BaseT Receive .....................................................................................................................................................19

Power Management..................................................................................................................................................20

Power Save Mode ..............................................................................................................................................20

MDI/MDI-X Auto Crossover ......................................................................................................................................20

Auto-Negotiation .......................................................................................................................................................20

Functional Overview: Switch Core ..............................................................................................................................21

Address Look-Up ......................................................................................................................................................21

Learning ....................................................................................................................................................................21

Migration ...................................................................................................................................................................21

Aging.........................................................................................................................................................................21

Forwarding ................................................................................................................................................................21

Switching Engine ......................................................................................................................................................21

MAC Operation .........................................................................................................................................................22

Inter Packet Gap (IPG).......................................................................................................................................22

Backoff Algorithm ...............................................................................................................................................22

Late Collision......................................................................................................................................................22

Illegal Frames.....................................................................................................................................................22

Flow Control .......................................................................................................................................................22

Half Duplex Back Pressure ................................................................................................................................22

Broadcast Storm Protection......................................................................................................................................22

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

SNI Interface (7-wire) Operation ..................................................................................................................................25

Programmable Features ...............................................................................................................................................25

Priority Schemes.......................................................................................................................................................25

Per Port Method........................................................................................................................................................25

802.1p Method..........................................................................................................................................................25

IPv4 DSCP Method...................................................................................................................................................25

Other Priority Considerations....................................................................................................................................25

VLAN Operation.............................................................................................................................................................26

Station MAC Address (control frames only) ..............................................................................................................27

EEPROM Operation.......................................................................................................................................................27

Optional CPU Interface .................................................................................................................................................28

January 2005

4

KS8999

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