Figure 15. Spi Information Unit Sequence During Initial Connection - Seagate Ultra160 Product Manual

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[1] See Table 48 for the format of the SPI L_Q information unit.
[2] See Table 45 for the format of the SPI Command information unit.
[3] See Figure 16.
[4] See Figure 18.
Figure 15. SPI information unit sequence during initial connection
SELECTION
DT DATA OUT
SPI L_Q
(always Init to Targ)
[1]
(logical connect)
SPI COMMAND
[2]
(always Init to Targ)
(logical disconnect)
BUS DT DATA IN
FREE (to SPI L_Q/DATA [3]
(physical or
disconnect) SPI L_Q/STATUS [4])
SCSI Interface Product Manual, Rev. B
Attention
Condition
MESSAGE MESSAGE
IN OUT
(QAS or WDTR)