AX88871AP datasheet(2/30 Pages) ASIX

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AX88871AP Bripeater

ASIX ELECTRONICS CORPORATION

CONTENTS

1.0 AX88871A OVERVIEW..................................................................................................................................... 4

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

1.2 FEATURES.......................................................................................................................................................... 5

1.3 BLOCK DIAGRAM ............................................................................................................................................... 6

1.4 PIN CONNECTION DIAGRAM (MODE 0)................................................................................................................. 7

1.5 PIN CONNECTION DIAGRAM (MODE 1)................................................................................................................. 8

2.0 PIN DESCRIPTION ........................................................................................................................................... 9

2.1 MII INTERFACES ................................................................................................................................................ 9

2.2 EXPANSION BUS INTERFACE FOR 100 MBPS....................................................................................................... 10

2.3 LED DISPLAY.................................................................................................................................................. 11

2.4 BUFFER MEMORY PINS GROUP ........................................................................................................................... 12

2.5 MISCELLANEOUS.............................................................................................................................................. 13

2.6 POWER ON CONFIGURATION SETUP SIGNALS CROSS REFERENCE TABLE ................................................................ 14

3.0 FUNCTIONAL DESCRIPTION ..................................................................................................................... 15

3.1 REPEATER STATE MACHINE.............................................................................................................................. 16

3.2 RXE /TXE CONTROL .................................................................................................................................. 16

3.3 JABBER STATE MACHINE.................................................................................................................................. 17

3.4 PARTITION STATE MACHINE............................................................................................................................. 17

3.5 EXPANSION LOGIC(CASCADE INTERFACE) ......................................................................................................... 17

3.6 DATA FLOW CONTROL...................................................................................................................................... 17

3.7 RID RECEIVE-TRANSMIT INTERFACE(DAISY CHAIN LOGIC)............................................................................... 18

3.8 LED DISPLAY INTERFACE ................................................................................................................................ 18

4.0 INTERNAL REGISTERS ................................................................................................................................ 20

4.1 CONFIGURATION REGISTER (CONFIG) ............................................................................................................. 20

4.2 REPEATER ID REGISTER ................................................................................................................................... 20

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

5.4.1 MII Interface Timing Tx & Rx ................................................................................................................. 22

5.4.2 Expansion Bus ......................................................................................................................................... 23

5.4.3 SRAM read cycle and write cycle ............................................................................................................. 24

5.4.4 LED DISPLAY ......................................................................................................................................... 25

5.4.5 LED Display After Reset ......................................................................................................................... 25

5.4.6 Repeater ID Daisy Chain ......................................................................................................................... 26

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

APPENDIX A: APPLICATIONS.......................................................................................................................... 28

A.1 STAND-ALONG 8-PORTS 10/100MBPS HUB APPLICATION ................................................................................. 28

A.2 MULTIPLE STAND-ALONG HUB CASCADE APPLICATION (OLD STACK SCHEME) .................................................. 28

A.3 MULTIPLE STAND-ALONG HUB CASCADE APPLICATION (NEW STACK SCHEME) ................................................. 29

APPENDIX B: USING MII I/F CONNECTS TO MAC ...................................................................................... 30

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