SCSI BUS ...................................................................................................................... 1 - 1
1.1
System Configuration .................................................................................................................. 1 - 1
1.2
Interface Signal Definition........................................................................................................... 1 - 3
1.3
Physical Requirements................................................................................................................. 1 - 7
1.3.1
Interface connector ...................................................................................................................... 1 - 8
1.3.2
Interface cable............................................................................................................................ 1 - 15
1.4
Electrical Requirements............................................................................................................. 1 - 17
1.4.1
Single-Ended type...................................................................................................................... 1 - 17
1.4.2
1.4.3
1.4.4
1.4.5
Signal driving conditions ........................................................................................................... 1 - 26
1.5
Timing Rule ............................................................................................................................... 1 - 28
1.5.1
Timing value.............................................................................................................................. 1 - 28
1.5.2
Measurement point .................................................................................................................... 1 - 35
1.6
Bus Phases ................................................................................................................................. 1 - 39
1.6.1
BUS FREE phase....................................................................................................................... 1 - 40
1.6.2
ARBITRATION phase .............................................................................................................. 1 - 41
1.6.3
SELECTION phase ................................................................................................................... 1 - 44
1.6.4
RESELECTION phase .............................................................................................................. 1 - 48
1.6.5
1.6.5.2 Synchronous mode..................................................................................................................... 1 - 55
1.6.6
COMMAND phase.................................................................................................................... 1 - 65
1.6.7
DATA phase .............................................................................................................................. 1 - 65
1.6.8
STATUS phase .......................................................................................................................... 1 - 68
1.6.9
MESSAGE phase....................................................................................................................... 1 - 68
1.6.10
1.6.11
Time monitoring feature ............................................................................................................ 1 - 71
1.7
Bus Conditions .......................................................................................................................... 1 - 72
1.7.1
ATTENTION condition ............................................................................................................ 1 - 72
1.7.2
RESET condition....................................................................................................................... 1 - 75
1.8
Bus Phase Sequence .................................................................................................................. 1 - 76
CONTENTS
C141-E123-01EN
page
ix