Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
11.7 Disc drive SCSI timing
Table 11.7-1. Disc drive SCSI timing
Waveform Waveform
Description Symbol [1] Table [1] Typical Max
Target Select Time (no Arbitration) T00 N/A <1 us <250 us
Target Select Time (with Arbitration) T01 4.5-1,2 2.34 us 2.44 us
Target Select to Command T02 4.5-1 3.82 us 3.84 us
Target Select to MSG Out T03 4.5-2 1.62 us 1.66 us
Identify MSG to Command T04 4.5-3 3.56 us 3.64 us
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 us 0.78 us
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 3.0 us
Arbitration to Reselect T13 4.5-7 1.82 us
Reselect to Identify MSG In T14 4.5-7 1.52 us
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 1.04 us
Command Complete MSG to Bus Free T19 4.5-5,8,15 0.80 us
Data to Save Data Pointer MSG T20 4.5-14 5.00 us
Save Data Pointer MSG to Disconnect
MSG T21 4.5-14 0.85 us
Command Byte Transfer T22 4.5-4 0.06 us
Next Command Byte Access 4.5-4
Next CDB Byte Access (Byte 2 of 6) T23.6.2 4.5-4 0.54 us 0.64 us
Next CDB Byte Access (Byte 3 of 6) T23.6.3 4.5-4 0.11 us 0.14 us
Next CDB Byte Access (Byte 4 of 6) T23.6.4 4.5-4 0.12 us 0.14 us
Next CDB Byte Access (Byte 5 of 6) T23.6.5 4.5-4 0.13 us 0.14 us
Next CDB Byte Access (Byte 6 of 6) T23.6.6 4.5-4 0.11 us 0.14 us
67
To Next Page
Loading...
