Disc Drive Scsi Timing - Seagate ST446452W Product Manual

54
9.10

Disc drive SCSI timing

Table 12: Disc drive SCSI timing
Description
Target select time (no arbitration)
Target select time (with arbitration)
Target select to command
Target select to MSG out
Identify MSG to command
Command to status
Command to data (para. in)
Command to data (para. out)
Command to data (write to data
buffer)
Command to disconnect MSG
Disconnect MSG to bus free
Disconnect to arbitration (for reselect)
This measures disconnected CMD
overhead.
Target win arbitration (for reselect)
Arbitration to reselect
Reselect to identify MSG in
Reselect identify MSG to status
Reselect identify MSG to data (media) T16
Data to status
Status to command complete MSG
Command complete MSG to bus free
Data to save data pointer MSG
Save data pointer MSG to
disconnect MSG
Command byte transfer
Next command byte access
Next CDB byte access (byte 2 of 6)
Next CDB byte access (byte 3 of 6)
Next CDB byte access (byte 4 of 6)
Next CDB byte access (byte 5 of 6)
Next CDB byte access (byte 6 of 6)
Next CDB byte access (byte 2 of 10)
Next CDB byte access (byte 3 of 10)
Next CDB byte access (byte 4 of 10)
Next CDB byte access (byte 5 of 10)
Next CDB byte access (byte 6 of 10)
Next CDB byte access (byte 7 of 10)
Next CDB byte access (byte 8 of 10)
Waveform Waveform
symbol [1] table [1]
T00 N/A
T01 4.5-1,2
T02 4.5-1
T03 4.5-2
T04 4.5-3
T05 4.5-5
T06 4.5-9
T07 4.5-10
T08 4.5-10
T09 4.5-6
T10 4.5-6,14
T11 4.5-6–b
T12 4.5-7
T13 4.5-7
T14 4.5-7
T15 4.5-8
4.5-11
T17 4.5-15
T18 4.5-5,8,15
T19 4.5-5,8,15
T20 4.5-14
T21 4.5-14
T22 4.5-4
4.5-4
T23.6.2 4.5-4
T23.6.3 4.5-4
T23.6.4 4.5-4
T23.6.5 4.5-4
T23.6.6 4.5-4
T23.10.2 4.5-4
T23.10.3 4.5-4
T23.10.4 4.5-4
T23.10.5 4.5-4
T23.10.6 4.5-4
T23.10.7 4.5-4
T23.10.8 4.5-4
Elite 47 Product Manual, Rev. A
Typical timing Maximum timing
<1 µs <250 µs
2.31 µs 2.36 µs
3.33 µs 3.34 µs
1.51 µs 1.54 µs
3.34 µs 3.36 µs
Command dependent Command dependent
Command dependent Command dependent
Command dependent Command dependent
Command dependent Command dependent
Command dependent Command dependent
0.64 µs 0.68 µs
Command dependent Command dependent
2.8 µs
1.8 µs
1.34 µs
Command dependent Command dependent
Command dependent Command dependent
Command dependent Command dependent
1.0 µs
0.75 µs
4.5 µs
0.75 µs
0.04 µs
0.55 µs 0.56 µs
0.10 µs 0.10 µs
0.09 µs 0.10 µs
0.13 µs 0.14 µs
0.13 µs 0.14 µs
0.59 µs 0.60 µs
0.14 µs 0.14 µs
0.13 µs 0.14 µs
0.12 µs 0.12 µs
0.11 µs 0.12 µs
0.10 µs 0.10 µs
0.09 µs 0.10 µs