Product manual

74 Barracuda 9 Product Manual, Rev. C
Notes.
[1] See the
SCSI Interface Product Manual, part number 77738479, Section 4.5.
[2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3.
[3] Synchronous Transfer Period is determined by negotiations between an Initiator and a Drive. The Drive is
capable of setting periods as given in Section 9.5. See also Sections 3.1.5.2 and 3.5.3.2 of the
SCSI
Interface Product Manual,
part number 77738479, for a description of synchronous data transfer opera-
tion.
General timing diagrams for SCSI interface operation are shown in the
SCSI Interface Product Manual,
part number 77738479, Section 4.5. The specific timing values that apply to this drive are listed in Table 12.
Data in byte transfer (parameter) T24 4.5-12 0.04 µs max.
Data out byte transfer (parameter) T25 4.5-13 0.04 µs max.
Next data in byte access (parameter) T26 4.5-12 0.10 µs
Next data byte out access (parameter) T27 4.5-13 0.10 µs
Data in byte transfer (media) [2] T28 4.5-12 0.03 µ
Data out byte transfer (media) [2] T29 4.5-13 0.03 µ
Next data in byte access (media [2] T30 4.5-12 0.10 µs
Next data in byte access (media [2] T31 4.5-13 0.10 µs
MSG IN byte transfer T32 4.5-5,7
4.5-8,14,15
0.09 µs
MSG OUT byte transfer T33 4.5-2 0.04 µs max.
STATUS byte transfer T34 4.5-5,8,15 0.04 µs max.
Synchronous data transfer characteristics:
Request signal transfer period [3] – – various
Description
Waveform
symbol [1]
Waveform
table [1] Typical timing