Table Of Contents - Fujitsu MBA3073 SERIES Technical Manual

CHAPTER 1 SCSI BUS .........................................................................................................................13
1.1 System Configuration ........................................................................................................................13
1.2 Interface Signal Definition ................................................................................................................15
1.3 Physical Requirements ......................................................................................................................19
1.3.1 Interface connector ..........................................................................................................................20
1.3.2 Interface cable .................................................................................................................................27
1.4 Electrical Requirements.....................................................................................................................29
1.4.1 Single-Ended type ...........................................................................................................................29
1.4.2 Low-Voltage Differential type ........................................................................................................32
1.4.3 Internal terminal resistor and power supply for terminating resistor ..............................................35
1.4.4 Usage in 8-bit/16-bit transfer mode.................................................................................................37
1.4.5 Signal driving conditions ................................................................................................................38
1.5 Timing Rule.......................................................................................................................................40
1.5.1 Timing value ...................................................................................................................................40
1.5.2 Measurement point ..........................................................................................................................54
1.6 Bus Phases .........................................................................................................................................59
1.6.1 BUS FREE phase ............................................................................................................................60
1.6.2 ARBITRATION phase....................................................................................................................61
1.6.2.1 Normal ARBITRATION.................................................................................................................61
1.6.2.2 QAS ARBITRATION.....................................................................................................................64
1.6.3 SELECTION phase .........................................................................................................................66
1.6.4 RESELECTION phase ....................................................................................................................70
1.6.5 INFORMATION TRANSFER phases ............................................................................................73
1.6.5.1 Asynchronous transfer mode...........................................................................................................74
1.6.5.2 Synchronous mode ..........................................................................................................................77
1.6.5.3 Paced transfer ..................................................................................................................................87
1.6.5.4 Wide mode transfer (16-bit SCSI)...................................................................................................98
1.6.6 COMMAND phase .........................................................................................................................99
1.6.7 DATA phase....................................................................................................................................99
1.6.8 STATUS phase..............................................................................................................................101
1.6.9 MESSAGE phase ..........................................................................................................................101
1.6.10 Signal requirements concerning transition between bus phases....................................................102
1.6.11 Time monitoring feature................................................................................................................104
C141-C015
CONTENTS
page
5