Seagate ST373454 Manual download pdf (Page 81)

Cheetah 15K.3 SCSI Product Manual, Rev. G 71

9.10 Disc drive SCSI timing

Table 22: 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

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 93 94

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