Seagate ST12400N - 11.7 Disc Drive SCSI Timing

Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B 65
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11.7 Disc drive SCSI timing
Table 11.7-1. Disc drive SCSI timing
Waveform Waveform
Description Symbol [1] Table [1] Typical
Target Select Time (no Arbitration) T00 N/A <1 µs
Target Select Time (with Arbitration) T01 4.5-1,2 2.34 µs
Target Select to Command T02 4.5-1 3.82 µs
Target Select to MSG Out T03 4.5-2 1.51 µs
Identify MSG to Command T04 4.5-3 3.56 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 0.68 µs
Disconnect to Arbitration (for Reselect) T11 4.5-6 Command Dependent
This measures disconnected CMD overhead.
Target win Arbitration(for Reselect) T12 4.5-7
Arbitration to Reselect T13 4.5-7
Reselect to Identify MSG In T14 4.5-7
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
Command Complete MSG to Bus Free T19 4.5-5,8,15
Data to Save Data Pointer MSG T20 4.5-14
Save Data Pointer MSG to Disconnect MSG T21 4.5-14
Command Byte Transfer T22 4.5-4
Next Command Byte Access 4.5-4
Next CDB Byte Access (Byte 2 of 6) T23.6.2 4.5-4 0.54 µs
Next CDB Byte Access (Byte 3 of 6) T23.6.3 4.5-4 0.11 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 0.13 µs
Next CDB Byte Access (Byte 6 of 6) T23.6.6 4.5-4 0.11 µs