AX88655AB datasheet(3/33 Pages) ASIX

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ASIX ELECTRONICS CORPORATION

AX88655AB 5-Port 10/100/1000BASE-T Ethernet Switch

CONFIDENTIAL

CONTENTS

1.0 AX88655AB OVERVIEW......................................................................................................................................... 5

1.1 GENERAL DESCRIPTION............................................................................................................................5

1.2 AX88655AB BLOCK DIAGRAM .............................................................................................5

1.3 PIN CONNECTION DIAGRAM...................................................................................................................6

2.0 I/O DEFINITION....................................................................................................................................................... 7

2.1 RGMII/GMII/MII INTERFACE.............................................................................................................7

2.2 MISCELLANEOUS..........................................................................................................................................9

3.0 FUNCTIONAL DESCRIPTION ............................................................................................................................ 11

3.1 INTRODUCTION ............................................................................................................................................11

3.2 PACKET FILTERING AND FORWARDING PROCESS.....................................................................11

3.3 MAC ADDRESS ROUTING, LEARNING AND AGING PROCESS.............................................11

3.4 FULL DUPLEX 802.3X FLOW CONTROL .........................................................................................11

3.5 HALF DUPLEX BACK PRESSURE CONTROL ..................................................................................11

3.6 MII POLLING ................................................................................................................................................11

3.7 PORT-BASED QOS: PORT-PAIR.........................................................................................................11

3.8 VLAN AND BROADCAST STORMING PREVENTION................................................................12

3.9 SECURITY OPERATION - PORT SA RESTRICTION .....................................................................12

3.10 INGRESS/EGRESS BANDWIDTH CONTROL SCHEME .............................................................12

3.11 PORT MIRRORING....................................................................................................................................12

4.0 REGISTER DESCRIPTIONS ................................................................................................................................ 13

5.0 ELECTRICAL SPECIFICATION AND TIMING............................................................................................... 21

5.1 ABSOLUTE MAXIMUM RATINGS ........................................................................................................21

5.2 GENERAL OPERATION CONDITIONS .................................................................................................21

5.3 DC CHARACTERISTICS............................................................................................................................21

5.4 AC SPECIFICATIONS..................................................................................................................................22

6.0 PACKAGE INFORMATION ................................................................................................................................. 27

APPENDIX A: SYSTEM APPLICATIONS ............................................................................................................... 30

APPENDIX B: DESIGN NOTE.................................................................................................................................... 31

APPENDIX C: WEIGHT SETTING FOR QOS ........................................................................................................ 32

APPENDIX D: RESOLUTION INGRESS/EGRESS FOR BANDWIDTH CONTROL ....................................... 32

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