TMC2074-NU 参数 Datasheet PDF下载

Dual Mode CircLink™ Controller

Datasheet

TABLE OF CONTENTS

Chapter 1

1.1

1.2

1.3

1.4

General Description................................................................................................................................6

About CircLink...................................................................................................................................................6

About TMC2074 .................................................................................................................................................7

Internal Block Diagram .....................................................................................................................................8

Pin Configuration ..............................................................................................................................................9

1.5

Pin Description by Functions.........................................................................................................................13

1.5.1

CPU Interface Pins (27) .................................................................................................................................13

1.5.2

Transceiver Interface Pins (5)........................................................................................................................13

1.5.3

Setup Pins (37) ..............................................................................................................................................14

1.5.4

External Output or I/O Pins (10).....................................................................................................................14

1.5.5

Test Pins (5) ..................................................................................................................................................15

1.5.6

Clock Pins (3) ................................................................................................................................................15

1.6

Setup Pins........................................................................................................................................................16

1.6.1

CPU Type Selection.......................................................................................................................................16

1.6.2

Address Multiplex Selection ...........................................................................................................................17

1.6.3

Write Timing Selection ...................................................................................................................................18

1.6.4

Read Timing Selection...................................................................................................................................19

1.6.5

Data Bus Width Selection ..............................................................................................................................20

1.6.6

Data Bus Byte Swap ......................................................................................................................................20

1.6.7

Data Strobe Polarity Specification..................................................................................................................20

1.6.8

Page Size Selection.......................................................................................................................................21

1.6.9

Maximum Node (MAXID) Number Setup .......................................................................................................21

1.6.10

Node ID Setup............................................................................................................................................21

1.6.11

NST Resolution Setup................................................................................................................................22

1.6.12

Standalone Mode Specification ..................................................................................................................22

1.6.13

Warning Timer Resolution/Standalone Sending Schedule Setup...............................................................22

1.6.14

Diagnosis Mode..........................................................................................................................................22

1.6.15

Prescaler Setup for Communication Speed................................................................................................22

1.6.16

NST Carry Output Digit Select....................................................................................................................23

1.6.17

CMI Bypass Specification...........................................................................................................................23

1.6.18

HUB Function ON/OFF ..............................................................................................................................23

1.6.19

Optical Transceiver Mode ..........................................................................................................................23

1.6.20

TXEN Polarity Select..................................................................................................................................24

1.6.21

Extension Timer Setting 1 ..........................................................................................................................24

1.6.22

Test Pins ....................................................................................................................................................24

Chapter 2

2.1

2.2

2.3

Functional Description.........................................................................................................................25

Communication Specification ........................................................................................................................25

Message Class.................................................................................................................................................25

CircLink Network Communication Protocol Overview ................................................................................26

2.4

CircLink Protocol Enhancement ....................................................................................................................27

2.4.1

Reducing Token Loss ....................................................................................................................................27

2.4.2

Reduction of Network Reconfiguration Time..................................................................................................27

2.4.3

Reduction of Reconfiguration Burst Signal Send Time ..................................................................................28

2.5

RAM Page Expansion......................................................................................................................................28

2.5.1

RAM Access ..................................................................................................................................................29

2.5.2

Packet Buffer Structure..................................................................................................................................31

2.5.3

Packet Data Structure....................................................................................................................................32

2.6

CPU Interface...................................................................................................................................................33

2.6.1

CPU Identification and Compatibility between Intel and Motorola Processors ...............................................33

SMSC TMC2074

Page 3

Revision 0.1 (03-29-06)

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