AX88873P datasheet(2/21 Pages) ASIX

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ASIX ELECTRONICS CORPORATION

CONFIDENTIAL

AX88873P 10/100Mb Repeater Controller PRELIMINARY

CONTENTS

1.0 AX88873 OVERVIEW ....................................................................................................................................... 4

1.1 GENERAL DESCRIPTION...................................................................................................................................... 4

1.2 AX88873 BLOCK DIAGRAM: .............................................................................................................................. 4

1.3 PIN CONNECTION DIAGRAM ............................................................................................................................... 5

2.0 PIN DESCRIPTION ........................................................................................................................................... 6

2.1 RMII INTERFACE FOR REPEATER PORTS............................................................................................................... 6

2.1.1 Repeater Port 0.......................................................................................................................................... 6

2.1.2 Repeater Port 1.......................................................................................................................................... 6

2.1.3 Repeater Port 2.......................................................................................................................................... 7

2.1.4 Repeater Port 3.......................................................................................................................................... 7

2.1.5 Repeater Port 4.......................................................................................................................................... 7

2.1.6 Repeater Port 5.......................................................................................................................................... 7

2.1.7 Repeater Port 6.......................................................................................................................................... 8

2.1.8 Repeater Port 7.......................................................................................................................................... 8

2.2 EXPANSION BUS INTERFACE FOR 100 MBPS......................................................................................................... 8

2.3 EXPANSION BUS INTERFACE FOR 10 MBPS........................................................................................................... 9

2.4 LED DISPLAY.................................................................................................................................................. 10

2.5 MISCELLANEOUS.............................................................................................................................................. 10

2.6 POWER ON CONFIGURATION SETUP SIGNALS CROSS REFERENCE TABLE ................................................................ 11

3.0 FUNCTIONAL DESCRIPTION ..................................................................................................................... 12

3.1 REPEATER STATE MACHINE.............................................................................................................................. 12

3.2 RXE /TXE CONTROL ...................................................................................................................................... 12

3.3 JABBER STATE MACHINE.................................................................................................................................. 12

3.4 PARTITION STATE MACHINE............................................................................................................................. 12

3.5 LED DISPLAY INTERFACE ................................................................................................................................ 13

4.0 INTERNAL REGISTERS ................................................................................................................................ 14

5.0 ELECTRICAL SPECIFICATION AND TIMING.......................................................................................... 15

5.1 ABSOLUTE MAXIMUM RATINGS ........................................................................................................................ 15

5.2 GENERAL OPERATION CONDITIONS................................................................................................................... 15

5.3 DC CHARACTERISTICS ..................................................................................................................................... 15

5.4 AC SPECIFICATIONS ......................................................................................................................................... 16

5.4.1 RMII Interface Timing TX & RX............................................................................................................... 16

5.4.2 MII Interface Timing TX & RX ................................................................................................................. 17

5.4.3 LED DISPLAY ......................................................................................................................................... 18

5.4.4 LED Display after Reset........................................................................................................................... 18

6.0 PACKAGE INFORMATION........................................................................................................................... 19

APPENDIX A: APPLICATIONS.......................................................................................................................... 20

A.1 16-PORT (24-PORT) REPEATER WITH 2-PORT SWITCH......................................................................................... 20

A.2 16-PORT REPEATER WITH UPTO 4 STACKS ......................................................................................................... 20

A.3 16-PORT REPEATER WITH UPTO 4 STACKS UP-LINK TO EXTERNAL SWITCH ........................................................... 21

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