Seagate ST3300655LW, ST3146855LC, ST3146855LW, ST3300655LC, ST373455LC manual Disc drive Scsi timing

Table 24: Disc drive SCSI timing (Continued)

These values are not current Cheetah 15K.5 SCSI values, but are listed for information only.

	Waveform	Waveform
Description	symbol [1]	table [1]	Typical timing
Next CDB Byte Access (Byte 2 of 10)	T23.10.2	4.5-4	0.59	μs
Next CDB Byte Access (Byte 3 of 10)	T23.10.3	4.5-4	0.11 μs ±1 μs
Next CDB Byte Access (Byte 4 of 10)	T23.10.4	4.5-4	0.12	μs ±1 μs
Next CDB Byte Access (Byte 5 of 10)	T23.10.5	4.5-4	0.11 μs ±1 μs
Next CDB Byte Access (Byte 6 of 10)	T23.10.6	4.5-4	0.11 μs ±1 μs
Next CDB Byte Access (Byte 7 of 10)	T23.10.7	4.5-4	0.13	μs ±1 μs
Next CDB Byte Access (Byte 8 of 10)	T23.10.8	4.5-4	0.12	μs ±1 μs
Next CDB Byte Access (Byte 9 of 10)	T23.10.9	4.5-4	0.12	μs ±1 μs
Next CDB Byte Access (Byte 10 of 10)	T23.10.10	4.5-4	0.12	μs ±1 μs
Data In Byte Transfer (parameter)	T24	4.5-12	0.04	μs
Data Out Byte Transfer (parameter)	T25	4.5-13	0.04	μs
Next Data In Byte Access (parameter)	T26	4.5-12	0.12	μs
Next Data Out Byte Access (parameter)	T27	4.5-13	0.12	μs
Data In Byte Transfer (media) [2]	T28	4.5-12	0.04	μs
Data Out Byte Transfer (media) [2]	T29	4.5-13	0.04	μs
Next Data In Byte access (media [2]	T30	4.5-12	0.12	μs
Next Data Out Byte access (media [2]	T31	4.5-13	0.12	μs
MSG IN Byte Transfer	T32	4.5-5,7,8,14,15	0.04	μs
MSG OUT Byte Transfer	T33	4.5-2	0.04	μs
STATUS Byte Transfer	T34	4.5-5,8,15	0.04	μs
Synchronous Data Transfer Characteristics:
Request Signal Transfer Period [3]	–	–	various (800 ns max)

Notes.

[1]See the Timing examples section of the Parallel SCSI Interface Manual.

[2]Maximum SCSI asynchronous interface transfer rate is given in Section 5.2.3 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 10.5. See also the Synchronous data transfer section and the Extended messages section of the Parallel SCSI Interface Manual for a description of synchronous data transfer operation.

Cheetah 15K.5 SCSI Product Manual, Rev. J 73