Disc Drive Scsi Timing - Seagate ST15150N - Barracuda 4.3 GB Hard Drive Product Manual

84
11.11
Table 20. 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 re-select)
This measures disconnected CMD overhead.
Target win arbitration (for re-select)
Arbitration to re-select
Re-select to Identify MSG in
Re-select Identify MSG to status
Re-select Identify MSG to data (media)
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)
Next CDB byte access (byte 9 of 10)
Next CDB byte access (byte 10 of 10)
ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D

Disc drive SCSI timing

Waveform
symbol [1]
T00
T01
T02
T03
T04
T05
T06
T07
T08
T09
T10
T11
T12
T13
T14
T15
T16
T17
T18
T19
T20
T21
T22
T23.6.2
T23.6.3
T23.6.4
T23.6.5
T23.6.6
T33
T34
T23.10.2
T23.10.3
T23.10.4
T23.10.5
T23.10.6
T23.10.7
T23.10.8
T23.10.9
T23.10.10
Waveform
table [1] Typical
N/A < 1 µs
4.5-1,2 2.31 µs
4.5-1 3.33 µs
4.5-2 1.51 µs
4.5-3 3.34 µs
4.5-5 Command dependent
4.5-9 Command dependent
4.5-10 Command dependent
4.5-10 Command dependent
4.5-6 Command dependent
4.5-6,14 0.64 µs
4.5-6 Command dependent
4.5-7
4.5-7
4.5-7
4.5-8 Command dependent
4.5-11 Command dependent
4.5-15 Command dependent
4.5-5,8,15
4.5-5,8,15
4.5-14
4.5-14
4.5-4
4.5-4
4.5-4 0.55 µs
4.5-4 0.10 µs
4.5-4 0.09 µs
4.5-4 0.13 µs
4.5-4 0.13 µs
4.5-4 0.59 µs
4.5-4 0.14 µs
4.5-4 0.13 µs
4.5-4 0.12 µs
4.5-4 0.11 µs
4.5-4 0.10 µs
4.5-4 0.09 µs
4.5-4 0.13 µs
4.5-4 0.12 µs
Max
< 250 µs
2.36 µs
3.34 µs
1.54 µs
3.36 µs
0.68 µs
2.8 µs
1.8 µs
1.34 µs
1.0 µs
0.75 µs
4.5 µs
0.75 µs
0.04 µs
0.56 µs
0.10 µs
0.10 µs
0.14 µs
0.14 µs
0.60 µs
0.14 µs
0.14 µs
0.12 µs
0.12 µs
0.10 µs
0.10 µs
0.14 µs
0.12 µs