10 disc drive scsi timing, Section 9.10 – Seagate Barracuda ST318418N User Manual
Page 83
Barracuda 36ES2 Product Manual, Rev. B
73
9.10
Disc drive SCSI timing
Table 17:
Disc drive SCSI timing
Description
Waveform
symbol [1]
Waveform
table [1]
Typical timing
Target Select Time (no Arbitration)
T00
N/A
<1
µs
Target Select Time (with Arbitration)
T01
4.5-1,2
1.93
µs
Target Select to Command
T02
4.5-1
3.77
µs
Target Select to MSG Out
T03
4.5-2
1.57
µs
Identify MSG to Command
T04
4.5-3
3.36
µs
Command to Status
T05
4.5-5
Command Dependent
Command to Data (para. In)
T06
4.5-9
Command Dependent
Command to Data (para. Out)
T07
4.5-10
Command Dependent
Command to Data (Write to Data Buffer)
T08
4.5-10
Command Dependent
Command to Disconnect MSG
T09
4.5-6
Command Dependent
Disconnect MSG to Bus Free
T10
4.5-6,14
0.52
µs
Disconnect to Arbitration (for Reselect)
This measures disconnected CMD overhead
T11
4.5-6
Command Dependent
Target win Arbitration (for Reselect)
T12
4.5-7
3.00
µs
Arbitration to Reselect
T13
4.5-7
1.60
µs
Reselect to Identify MSG In
T14
4.5-7
1.39
µs
Reselect Identify MSG to Status
T15
4.5-8
Command Dependent
Reselect Identify MSG to Data (media)
T16
4.5-11
Command Dependent
Data to Status
T17
4.5-15
Command Dependent
Status to Command Complete MSG
T18
4.5-5,8,15
0.98
µs
Command Complete MSG to Bus Free
T19
4.5-5,8,15
0.51
µs
Data to Save Data Pointer MSG
T20
4.5-14
4.00
µs
Save Data Pointer MSG to Disconnect MSG
T21
4.5-14
0.79
µs
Command Byte Transfer
T22
4.5-4
0.04
µs
Next Command Byte Access:
4.5-4
Next CDB Byte Access (Byte 2 of 6)
T23.6.2
4.5-4
0.58
µs
Next CDB Byte Access (Byte 3 of 6)
T23.6.3
4.5-4
0.12
µs
Next CDB Byte Access (Byte 4 of 6)
T23.6.4
4.5-4
0.12
µs
Next CDB Byte Access (Byte 5 of 6)
T23.6.5
4.5-4
0.12
µs
Next CDB Byte Access (Byte 6 of 6)
T23.6.6
4.5-4
0.12
µs
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