COM90C66 参数 Datasheet PDF下载

TABLE OF CONTENTS

FEATURES ........................................................................................................................................................................ 1

GENERAL DESCRIPTION ................................................................................................................................................ 1

PIN CONFIGURATION ...................................................................................................................................................... 3

DESCRIPTION OF PIN FUNCTIONS ............................................................................................................................... 4

PROTOCOL DESCRIPTION ............................................................................................................................................. 9

NETWORK PROTOCOL ........................................................................................................................................... 9

NETWORK RECONFIGURATION ........................................................................................................................... 9

BROADCAST MESSAGES ..................................................................................................................................... 10

EXTENDED TIMEOUT FUNCTION ........................................................................................................................ 10

LINE PROTOCOL .................................................................................................................................................... 10

SYSTEM DESCRIPTION .................................................................................................................................................. 12

MICROPROCESSOR INTERFACE ......................................................................................................................... 12

TRANSMISSION MEDIA INTERFACE .................................................................................................................... 13

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

MICROSEQUENCER ............................................................................................................................................... 13

ADDRESS DECODING ............................................................................................................................................ 19

INTERNAL REGISTERS .......................................................................................................................................... 22

INTERNAL RAM ....................................................................................................................................................... 29

SOFTWARE INTERFACE ........................................................................................................................................ 29

SOFTWARE COMPATIBILITY CONSIDERATIONS .............................................................................................. 31

COMMAND CHAINING ............................................................................................................................................ 32

RESET DETAILS ...................................................................................................................................................... 34

READ AND WRITE CYCLES ................................................................................................................................... 35

NODE ID LOGIC ....................................................................................................................................................... 43

TRANSMIT/RECEIVE LOGIC .................................................................................................................................. 43

IMPROVED DIAGNOSTICS ..................................................................................................................................... 43

OSCILLATOR ........................................................................................................................................................... 45

OPERATIONAL DESCRIPTION ...................................................................................................................................... 46

MAXIMUM GUARANTEED RATINGS ..................................................................................................................... 46

DC CHARACTERISTICS.......................................................................................................................................... 46

TIMING DIAGRAMS ......................................................................................................................................................... 49

Please see Addendum 1 entitled Data Sheet Errata for Revision B COM90C66, which discusses changes to this

data sheet which apply to the Revision B device, on Page 62.

Please see Addendum 2 entitled Data Sheet Errata for Revision D COM90C66, which discusses changes to this

data sheet which apply to the Revision D device, on Page 64.

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