SMSC COM20020 manual Table of Contents

TABLE OF CONTENTS
FEATURES	1
GENERAL DESCRIPTION	1
PIN CONFIGURATION	3
DESCRIPTION OF PIN FUNCTIONS	4
PROTOCOL DESCRIPTION	8
NETWORK PROTOCOL	8
DATA RATES	8
NETWORK RECONFIGURATION	8
BROADCAST MESSAGES	9
EXTENDED TIMEOUT FUNCTION	9
LINE PROTOCOL	10
SYSTEM DESCRIPTION	12
MICROCONTROLLER INTERFACE	12
TRANSMISSION MEDIA INTERFACE	15
FUNCTIONAL DESCRIPTION	19
MICROSEQUENCER	19
INTERNAL REGISTERS	22
INTERNAL RAM	32
COMMAND CHAINING	37
INITIALIZATION SEQUENCE	40
IMPROVED DIAGNOSTICS	40
OPERATIONAL DESCRIPTION	43
MAXIMUM GUARANTEED RATINGS*	43
DC ELECTRICAL CHARACTERISTICS	43
TIMING DIAGRAMS	46
COM20020 ERRATA SHEET	59

For more details on the ARCNET protocol engine and traditional dipulse signalling schemes, please refer to the ARCNET Local Area Network Standard, available from Standard Microsystems Corporation or the ARCNET Designer's Handbook, available from Datapoint Corporation.

For more detailed information on cabling options including RS485, transformer-coupled RS- 485 and Fiber Optic interfaces, please refer to the following technical note which is available from Standard Microsystems Corporation: Technical Note 7-5 - Cabling Guidelines for the COM20020 ULANC.

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