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COM20020I3V-DZD Datasheet(PDF) 3 Page - SMSC Corporation |
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COM20020I3V-DZD Datasheet(HTML) 3 Page - SMSC Corporation |
3 / 69 page 5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM SMSC COM20020I 3.3V Rev.E Page 3 Revision 09-11-06 DATASHEET TABLE OF CONTENTS CHAPTER 1 GENERAL DESCRIPTION................................................................................................................5 CHAPTER 2 PIN CONFIGURATIONS ...................................................................................................................6 CHAPTER 3 DESCRIPTION OF PIN FUNCTIONS ...............................................................................................8 CHAPTER 4 PROTOCOL DESCRIPTION...........................................................................................................11 4.1 NETWORK PROTOCOL ...................................................................................................................................11 4.2 DATA RATES ................................................................................................................................................11 4.2.1 Selecting Clock Frequencies Above 2.5 Mbps .................................................................................... 11 4.3 NETWORK RECONFIGURATION........................................................................................................................12 4.4 BROADCAST MESSAGES ................................................................................................................................12 4.5 EXTENDED TIMEOUT FUNCTION ......................................................................................................................12 4.6 LINE PROTOCOL............................................................................................................................................13 CHAPTER 5 SYSTEM DESCRIPTION ................................................................................................................15 5.1 MICROCONTROLLER INTERFACE .....................................................................................................................15 5.2 TRANSMISSION MEDIA INTERFACE ..................................................................................................................19 CHAPTER 6 FUNCTIONAL DESCRIPTION........................................................................................................24 6.1 MICROSEQUENCER........................................................................................................................................24 6.2 INTERNAL REGISTERS ............................................................................................................................25 6.3 INTERNAL RAM..............................................................................................................................................35 6.4 COMMAND CHAINING .....................................................................................................................................40 6.5 INITIALIZATION SEQUENCE..............................................................................................................................42 6.6 IMPROVED DIAGNOSTICS................................................................................................................................42 CHAPTER 7 OPERATIONAL DESCRIPTION .....................................................................................................45 7.1 MAXIMUM GUARANTEED RATINGS* .................................................................................................................45 7.2 DC ELECTRICAL CHARACTERISTICS ................................................................................................................45 CHAPTER 8 TIMING DIAGRAMS .......................................................................................................................48 CHAPTER 9 PACKAGE OUTLINES ...................................................................................................................63 CHAPTER 10 APPENDIX A...................................................................................................................................65 CHAPTER 11 APPENDIX B...................................................................................................................................68 CHAPTER 12 APPENDIX C...................................................................................................................................69 12.1 SOFTWARE IDENTIFICATION OF THE COM20020I 3V REV D AND REV E ............................................................69 |
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