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TMC2084

Standalone Mode CircLink™ Controller

SMSC -> Microchip 

Standalone Mode CircLink TM Controller

Datasheet

TABLE OF CONTENTS

Chapter 1 General Description ............................................................................................................. 5

1.1 About CircLink ..................................................................................................................................... 5

1.2 About TMC2084 .................................................................................................................................. 5

1.3 Block Diagram ..................................................................................................................................... 7

1.4 Pin List................................................................................................................................................. 8

1.5 Pinout ................................................................................................................................................ 12

Chapter 2 Functional Description....................................................................................................... 13

2.1 Network Configuration....................................................................................................................... 13

2.1.1 General...................................................................................................................................................13

2.1.2 Configuration Examples..........................................................................................................................15

2.2 Initial Configuration............................................................................................................................ 16

2.2.1 Configuration Using Shared Pins............................................................................................................16

2.2.2 Configuration Through the Network ........................................................................................................21

2.2.3 Returning Configuration Data .................................................................................................................29

2.3 Types of Packets............................................................................................................................... 30

2.3.1 Packets TMC2084 Can Receive.............................................................................................................30

2.3.2 Packets TMC2084 Can Transmit............................................................................................................31

2.4 Command Packets ............................................................................................................................ 32

2.4.1 Format of COMMAND Packets...............................................................................................................32

2.5 OUTPUT PORTs............................................................................................................................... 34

2.5.1 Format of OUTPUT DATA Packets ........................................................................................................35

2.5.2 Configuring I/O Port Directions ...............................................................................................................36

2.5.3 Open-Drain Mode ...................................................................................................................................36

2.5.4 Initializing OUTPUT PORTs ...................................................................................................................36

2.5.5 Switching Timing In OUTPUT PORTs ....................................................................................................36

2.6 INPUT PORT..................................................................................................................................... 37

2.6.1 Format of Input Data Packets .................................................................................................................38

2.7 FLAG OUTPUT ................................................................................................................................. 40

2.7.1 Flag Descriptions ....................................................................................................................................41

2.7.2 Pulse Level Width Of Each Output Flag .................................................................................................42

2.8 Status Bits ......................................................................................................................................... 42

2.9 NST Time Stamps ............................................................................................................................. 45

2.9.1 Time Synchronization .............................................................................................................................46

2.9.2 Carry Output ...........................................................................................................................................46

2.10 CMI Coding .................................................................................................................................... 48

2.11 RAM Image On Host Side.............................................................................................................. 48

2.12 Configuration Flow ......................................................................................................................... 51

Chapter 3 Operating Conditions......................................................................................................... 53

3.1 Absolute Maximum Ratings .............................................................................................................. 53

3.2 Typical Operating Conditions ............................................................................................................ 53

3.3 DC Characteristics ............................................................................................................................ 53

3.4 AC Characteristics............................................................................................................................. 55

3.4.1 Timing Measurement Points ...................................................................................................................55

3.4.2 CMI Transmit And Receive Waveforms (nCMIBYP = H) ........................................................................56

3.4.3 RZ Transmit And Receive Waveforms (nCMIBYP = L) ..........................................................................57

3.4.4 External Trigger Input .............................................................................................................................57

3.4.5 Other Timing Specifications ....................................................................................................................58

3.5 Package Outline ................................................................................................................................ 59

3.6 Device Marking.................................................................................................................................. 61

3.7 Oscillator Circuit ................................................................................................................................ 62

3.8 Basic Device Connections ................................................................................................................ 63

SMSC TMC2084

Page 3

DATASHEET

Revision 0.1 (03-31-06)

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