&
&
&
bus free
delay
arbitration delay
bus free
delay
bus set delay
bus free
delay
bus clear delay
arbitration delay
bus free delay
bus settle
delay
ARBITRATION phase
BSY
SEL
DB
SCSI
BSY
SEL
DB(7)
ID7
BSY
SEL
DB (3)
ID3
BSY
SEL
DB (1)
ID1
bus clear delay
+ bus settle delay
bus set
delay
ID7: Succeeds in ARBITRATION
ID3: Detects the SEL signal of other SCSI unit
ID1: Detects the SCSI ID with higher priority than itself
&: The point at which the BUS FREE phase is detected by each SCSI unit.
4 $ 14