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Product Manual - Disc Drive SCSI-2/SCSI-3 Interface (Vol. 2; Ver. 2), Rev. E
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3.3.3
All systems
There are no restrictions on the sequences between information transfer phases. A phase type may even be
followed by the same phase type (e.g., a Data phase may be followed by another Data phase).
Reset Condition
Bus
Free
Phase
Arbitration
Phase
Selection or
Reselection
Phase
Command or
Data*
or Status or
Message Phase
Figure 3.3-1. Phase sequences with arbitration
Reset Condition
Bus Free
Phase
Selection
Phase
Command or Data
or Status or
Message Phase
Figure 3.3-2. Phase sequences without arbitration
*Data phase must follow a command phase except after reselection phase
