Seagate Cheetah ST3146854, User Manual

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82 Cheetah 15K.4 SCSI Product Manual, Rev. D
Notes.
[1] See the Timing examples section of the SCSI Interface Product Manual.
[2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual.
[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 the Synchronous data transfer section and the
Extended messages section of the SCSI Interface Product Manual for a description of synchronous data
transfer operation.
Next CDB Byte Access (Byte 2 of 10) T23.10.2 4.5-4 0.59
µ
s
Next CDB Byte Access (Byte 3 of 10) T23.10.3 4.5-4 0.11
µ
s ±1
µ
s
Next CDB Byte Access (Byte 4 of 10) T23.10.4 4.5-4 0.12
µ
s ±1
µ
s
Next CDB Byte Access (Byte 5 of 10) T23.10.5 4.5-4 0.11
µ
s ±1
µ
s
Next CDB Byte Access (Byte 6 of 10) T23.10.6 4.5-4 0.11
µ
s ±1
µ
s
Next CDB Byte Access (Byte 7 of 10) T23.10.7 4.5-4 0.13
µ
s ±1
µ
s
Next CDB Byte Access (Byte 8 of 10) T23.10.8 4.5-4 0.12
µ
s ±1
µ
s
Next CDB Byte Access (Byte 9 of 10) T23.10.9 4.5-4 0.12
µ
s ±1
µ
s
Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12
µ
s ±1
µ
s
Data In Byte Transfer (parameter) T24 4.5-12 0.04
µ
s
Data Out Byte Transfer (parameter) T25 4.5-13 0.04
µ
s
Next Data In Byte Access (parameter) T26 4.5-12 0.12
µ
s
Next Data Out Byte Access (parameter) T27 4.5-13 0.12
µ
s
Data In Byte Transfer (media) [2] T28 4.5-12 0.04
µ
s
Data Out Byte Transfer (media) [2] T29 4.5-13 0.04
µ
s
Next Data In Byte access (media [2] T30 4.5-12 0.12
µ
s
Next Data Out Byte access (media [2] T31 4.5-13 0.12
µ
s
MSG IN Byte Transfer T32 4.5-5,7,8,14,15 0.04
µ
s
MSG OUT Byte Transfer T33 4.5-2 0.04
µ
s
STATUS Byte Transfer T34 4.5-5,8,15 0.04
µ
s
Synchronous Data Transfer Characteristics:
Request Signal Transfer Period [3] – – various (800 ns max)
Table 32: Disc drive SCSI timing (Continued)
These values are not current Cheetah 15K.4 SCSI values, but are listed for information only.
Description
Waveform
symbol [1] Waveform
table [1]
Typical timing