Peripheral Mode CircLink™ Controller
Datasheet
TABLE OF CONTENTS
Chapter 1
1.1
1.2
1.3
1.4
General Description ............................................................................................................. 6
About CircLink ..................................................................................................................................... 6
About the TMC2072 ............................................................................................................................ 7
Pin Configuration................................................................................................................................. 9
Pin Description by Functions............................................................................................................. 14
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
CPU Interface (27)..................................................................................................................................14
Transceiver Interface (5).........................................................................................................................14
Setup Pin (33).........................................................................................................................................14
External Output or Input/output (10) .......................................................................................................15
Other Input (5) ........................................................................................................................................15
Clock (3) .................................................................................................................................................16
CPU Type Selection ...............................................................................................................................16
Address Multiplex Selection....................................................................................................................17
Write Timing Selection............................................................................................................................19
Read Timing Selection............................................................................................................................20
Data Bus Width Selection .......................................................................................................................21
Data Bus Byte Swap ...............................................................................................................................21
Data Strobe Polarity Specification ..........................................................................................................21
Page Size Selection................................................................................................................................21
MAXID Number Setup ............................................................................................................................21
Node ID Setup.....................................................................................................................................22
NST Resolution Setup.........................................................................................................................22
Standalone Mode Specification (Not supported) .................................................................................22
Warning Timer Resolution...................................................................................................................22
Diagnosis Mode ..................................................................................................................................22
Prescaler Setup for Communication Speed ........................................................................................23
CPU Interface Bus Timing Selection ...................................................................................................23
CMI Bypass Specification....................................................................................................................23
ON/OFF of HUB Function ...................................................................................................................23
Optical Transceiver Mode ...................................................................................................................24
TXEN Polarity Select...........................................................................................................................24
Extension Timer Setting 1 ...................................................................................................................24
Test Pins .............................................................................................................................................24
1.5
User Setup Pins ................................................................................................................................ 16
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.5.6
1.5.7
1.5.8
1.5.9
1.5.10
1.5.11
1.5.12
1.5.13
1.5.14
1.5.15
1.5.16
1.5.17
1.5.18
1.5.19
1.5.20
1.5.21
1.5.22
Chapter 2
2.1
2.2
2.3
2.4
Functional Description....................................................................................................... 25
Communication Specification............................................................................................................ 25
Message Class.................................................................................................................................. 25
CircLink Network Communication Protocol Overview ...................................................................... 26
CircLink Protocol Enhancement........................................................................................................ 27
2.4.1
2.4.2
2.4.3
Reducing Token Loss .............................................................................................................................27
Reduction of Network Reconfiguration Time...........................................................................................27
Reduction of Reconfiguration Burst Signal Send Time. ..........................................................................28
RAM Access ...........................................................................................................................................29
Packet Buffer Structure...........................................................................................................................31
Packet Data Structure.............................................................................................................................32
CPU Identification and Compatibility Between Intel and Motorola Processors........................................33
Interface Restrictions ..............................................................................................................................34
Operation Mode ......................................................................................................................................35
Communication Mode.............................................................................................................................36
Example of Sending Control from CPU in Free Format Mode ................................................................38
TX Control from CPU in Remote Buffer Mode ........................................................................................39
Page 3
Revision 0.1 (01-30-06)
2.5
RAM Page Expansion ....................................................................................................................... 28
2.5.1
2.5.2
2.5.3
2.6
2.7
2.8
CPU Interface.................................................................................................................................... 33
2.6.1
2.6.2
2.7.1
2.7.2
2.8.1
2.8.2
Operation and Communication Modes of CircLink ........................................................................... 35
Sending in Peripheral Mode.............................................................................................................. 38
SMSC TMC2072
DATASHEET
SMSC [ SMSC CORPORATION ]
