AX88655P datasheet(3/40 Pages) ASIX

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ASIX ELECTRONICS CORPORATION

AX88655 P 5-Port 10/100/1000BASE-T Ethernet Switch

CONTENTS

1.0 AX88655 OVERVIEW ............................................................................................................. 6

1.1 GENERAL DESCRIPTION ..................................................................................................................... 6

1.2 AX88655 BLOCK DIAGRAM ................................................................................................. 6

1.3 PIN CONNECTION DIAGRAM............................................................................................................. 7

2.0 I/O DEFINITION ............................................................................................................................................... 8

2.1 GMII/MII INTERFACE ........................................................................................................................ 8

2.1.1 GMII Interface Port 0 ................................................................................................................................ 8

2.1.2 GMII Interface Port 1 ................................................................................................................................ 9

2.1.3 GMII Interface Port 2 ................................................................................................................................ 9

2.1.4 GMII Interface Port 3 ................................................................................................................................ 9

2.1.5 GMII Interface Port 4 .............................................................................................................................. 10

2.2 MISCELLANEOUS ................................................................................................................................. 10

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

3.1 INTRODUCTION..................................................................................................................................... 12

3.2 PACKET FILTERING AND FORWARDING PROCESS ................................................................. 12

3.3 MAC ADDRESS ROUTING, LEARNING AND AGING PROCESS .......................................... 12

3.4 FULL DUPLEX 802.3X FLOW CONTROL..................................................................................... 12

3.5 HALF DUPLEX BACK PRESSURE CONTROL.............................................................................. 12

3.6 MII POLLING......................................................................................................................................... 12

3.7 PORT-BASED QOS: PORT-PAIR ................................................................................................... 13

4.0 REGISTER DESCRIPTIONS......................................................................................... 14

4.1 REGISTER 00.................................................................................................................................................... 14

4.2 REGISTER 01.................................................................................................................................................... 14

4.3 REGISTER 02.................................................................................................................................................... 14

4.4 REGISTER 03.................................................................................................................................................... 15

4.5 REGISTER 04.................................................................................................................................................... 15

4.6 REGISTER 05.................................................................................................................................................... 15

4.7 REGISTER 06.................................................................................................................................................... 15

4.8 REGISTER 07.................................................................................................................................................... 15

4.9 REGISTER 08.................................................................................................................................................... 15

4.10 REGISTER 09.................................................................................................................................................. 15

4.11 REGISTER 0A ................................................................................................................................................. 15

4.12 REGISTER 0B ................................................................................................................................................. 16

4.13 REGISTER 0C ................................................................................................................................................. 16

4.14 REGISTER 0D ................................................................................................................................................. 16

4.15 REGISTER 0E ................................................................................................................................................. 16

4.16 REGISTER 0F.................................................................................................................................................. 17

4.17 REGISTER 10.................................................................................................................................................. 17

4.18 REGISTER 11.................................................................................................................................................. 18

4.19 REGISTER 12.................................................................................................................................................. 18

4.20 REGISTER 13.................................................................................................................................................. 18

4.21 REGISTER 14.................................................................................................................................................. 18

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