AX88875AP datasheet(2/23 Pages) ASIX

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AX88875AP Bripeater

ASIX ELECTRONICS CORPORATION

CONTENTS

1.0 AX88875A OVERVIEW..................................................................................................................................... 3

1.1 GENERAL DESCRIPTION...................................................................................................................................... 3

1.2 FEATURES.......................................................................................................................................................... 4

1.3 BLOCK DIAGRAM ............................................................................................................................................... 5

1.4 PIN CONNECTION DIAGRAM (MODE 0) ................................................................................................................ 6

1.5 PIN CONNECTION DIAGRAM (MODE 1) ................................................................................................................ 7

2.0 PIN DESCRIPTION ........................................................................................................................................... 8

2.1 MII INTERFACES ................................................................................................................................................ 8

2.2 LED DISPLAY.................................................................................................................................................... 9

2.3 BUFFER MEMORY PINS GROUP ........................................................................................................................... 10

2.4 MISCELLANEOUS.............................................................................................................................................. 11

2.5 POWER ON CONFIGURATION SETUP SIGNALS CROSS REFERENCE TABLE ................................................................ 12

3.0 FUNCTIONAL DESCRIPTION ..................................................................................................................... 13

3.1 REPEATER STATE MACHINE.............................................................................................................................. 13

3.2 RXE /TXE CONTROL ................................................................................................................................... 13

3.3 JABBER STATE MACHINE.................................................................................................................................. 14

3.4 PARTITION STATE MACHINE............................................................................................................................. 14

3.5 LED DISPLAY INTERFACE ................................................................................................................................ 14

4.0 INTERNAL REGISTERS ................................................................................................................................ 16

4.1 CONFIGURATION REGISTER (CONFIG) ............................................................................................................. 16

5.0 ELECTRICAL SPECIFICATION AND TIMING.......................................................................................... 17

5.1 ABSOLUTE MAXIMUM RATINGS ........................................................................................................................ 17

5.2 GENERAL OPERATION CONDITIONS................................................................................................................... 17

5.3 DC CHARACTERISTICS ..................................................................................................................................... 17

5.4 AC SPECIFICATIONS ......................................................................................................................................... 18

5.4.1 MII Interface Timing Tx & Rx .................................................................................................................. 18

5.4.2 SRAM read cycle and write cycle ............................................................................................................. 19

5.4.3 LED DISPLAY ......................................................................................................................................... 20

5.4.4 LED Display After Reset .......................................................................................................................... 20

6.0 PACKAGE INFORMATION........................................................................................................................... 21

APPENDIX A: APPLICATIONS.......................................................................................................................... 22

A.1 STAND-ALONG 5-PORTS 10/100MBPS HUB APPLICATION ................................................................................. 22

A.2 STAND-ALONG 4-PORTS 10/100MBPS HUB WITH ONE MAC APPLICATION ........................................................ 22

APPENDIX B: USING MII I/F CONNECTS TO MAC ...................................................................................... 23

FIGURES

FIG - 1 CHIP BLOCK DIAGRAM ..................................................................................................................................... 5

FIG - 2 PIN CONNECTION DIAGRAM (MODE 0) .............................................................................................................. 6

FIG - 3 PIN CONNECTION DIAGRAM (MODE 1) .............................................................................................................. 7

FIG - 4 APPLICATION FOR LED DISPLAY ..................................................................................................................... 15

FIG - 5 STAND-ALONG 5-PORTS 10/100MBPS HUB APPLICATION ................................................................................ 22

FIG - 6 STAND-ALONG 4-PORTS 10/100MBPS HUB WITH ONE MAC APPLICATION ....................................................... 22

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