Section 5 SCSI Programming Guidelines
5.4.3
ALL
SYSTEMS
There are no restrictions
on
the sequences
of
infonnation transfer phases. A phase type may even be
followed by the same phase type; for example, a data phase may
be
followed by another data phase.
FIGURE 5-1 Phase Sequences without Arbitration
ESET
CONDITION
COMMAND
or
DATA
or
STATUS
or
WESSAGE
PHASE
Figure 5-2 Phase Sequences With Arbitration
5·8
SCSI
Programming
Guidelines