Seagate ST15150N Product Manual - Page 94

Disc drive SCSI timing

Get Seagate ST15150N - Barracuda 4.3 GB Hard Drive PDF manuals and user guides View all Seagate ST15150N manuals
Add to My Manuals
Save this manual to your list of manuals

Page 94 highlights

84 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 11.11 Disc drive SCSI timing Table 20. Disc drive SCSI timing Description Waveform symbol [1] Target select time (no arbitration) T00 Target select time (with arbitration) T01 Target select to command T02 Target select to MSG out T03 Identify MSG to command T04 Command to status T05 Command to data (para. in) T06 Command to data (para. out) T07 Command to data (write to data buffer) T08 Command to disconnect MSG T09 Disconnect MSG to bus free T10 Disconnect to arbitration (for re-select) T11 This measures disconnected CMD overhead. Target win arbitration (for re-select) T12 Arbitration to re-select T13 Re-select to Identify MSG in T14 Re-select Identify MSG to status T15 Re-select Identify MSG to data (media) T16 Data to status T17 Status to command complete MSG T18 Command complete MSG to bus free T19 Data to save data pointer MSG T20 Save data pointer MSG to disconnect MSG T21 Command byte transfer T22 Next command byte access Next CDB byte access (byte 2 of 6) T23.6.2 Next CDB byte access (byte 3 of 6) T23.6.3 Next CDB byte access (byte 4 of 6) T23.6.4 Next CDB byte access (byte 5 of 6) T23.6.5 Next CDB byte access (byte 6 of 6) T23.6.6 T33 T34 Next CDB byte access (byte 2 of 10) T23.10.2 Next CDB byte access (byte 3 of 10) T23.10.3 Next CDB byte access (byte 4 of 10) T23.10.4 Next CDB byte access (byte 5 of 10) T23.10.5 Next CDB byte access (byte 6 of 10) T23.10.6 Next CDB byte access (byte 7 of 10) T23.10.7 Next CDB byte access (byte 8 of 10) T23.10.8 Next CDB byte access (byte 9 of 10) T23.10.9 Next CDB byte access (byte 10 of 10) T23.10.10 Waveform table [1] N/A 4.5-1,2 4.5-1 4.5-2 4.5-3 4.5-5 4.5-9 4.5-10 4.5-10 4.5-6 4.5-6,14 4.5-6 Typical Max < 1 µs < 250 µs 2.31 µs 2.36 µs 3.33 µs 3.34 µs 1.51 µs 1.54 µs 3.34 µs 3.36 µs Command dependent Command dependent Command dependent Command dependent Command dependent 0.64 µs 0.68 µs Command dependent 4.5-7 4.5-7 4.5-7 4.5-8 4.5-11 4.5-15 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 4.5-4 4.5-4 4.5-4 4.5-4 2.8 µs 1.8 µs 1.34 µs Command dependent Command dependent Command dependent 1.0 µs 0.75 µs 4.5 µs 0.75 µs 0.04 µs 0.55 µs 0.10 µs 0.09 µs 0.13 µs 0.13 µs 0.56 µs 0.10 µs 0.10 µs 0.14 µs 0.14 µs 4.5-4 4.5-4 4.5-4 4.5-4 4.5-4 4.5-4 4.5-4 4.5-4 4.5-4 0.59 µs 0.14 µs 0.13 µs 0.12 µs 0.11 µs 0.10 µs 0.09 µs 0.13 µs 0.12 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

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
84
ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
11.11
Disc drive SCSI timing
Table 20.
Disc drive SCSI timing
Waveform
Waveform
Description
symbol [1]
table [1]
Typical
Max
Target select time (no arbitration)
T00
N/A
< 1 μs
< 250 μs
Target select time (with arbitration)
T01
4.5-1,2
2.31 μs
2.36 μs
Target select to command
T02
4.5-1
3.33 μs
3.34 μs
Target select to MSG out
T03
4.5-2
1.51 μs
1.54 μs
Identify MSG to command
T04
4.5-3
3.34 μs
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
0.64 μs
0.68 μs
Disconnect to arbitration (for re-select)
T11
4.5-6
Command dependent
This measures disconnected CMD overhead.
Target win arbitration (for re-select)
T12
4.5-7
2.8 μs
Arbitration to re-select
T13
4.5-7
1.8 μs
Re-select to Identify MSG in
T14
4.5-7
1.34 μs
Re-select Identify MSG to status
T15
4.5-8
Command dependent
Re-select 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
1.0 μs
Command complete MSG to bus free
T19
4.5-5,8,15
0.75 μs
Data to save data pointer MSG
T20
4.5-14
4.5 μs
Save data pointer MSG to disconnect MSG
T21
4.5-14
0.75 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
0.55 μs
0.56 μs
Next CDB byte access (byte 3 of 6)
T23.6.3
4.5-4
0.10 μs
0.10 μs
Next CDB byte access (byte 4 of 6)
T23.6.4
4.5-4
0.09 μs
0.10 μs
Next CDB byte access (byte 5 of 6)
T23.6.5
4.5-4
0.13 μs
0.14 μs
Next CDB byte access (byte 6 of 6)
T23.6.6
4.5-4
0.13 μs
0.14 μs
T33
T34
Next CDB byte access (byte 2 of 10)
T23.10.2
4.5-4
0.59 μs
0.60 μs
Next CDB byte access (byte 3 of 10)
T23.10.3
4.5-4
0.14 μs
0.14 μs
Next CDB byte access (byte 4 of 10)
T23.10.4
4.5-4
0.13 μs
0.14 μs
Next CDB byte access (byte 5 of 10)
T23.10.5
4.5-4
0.12 μs
0.12 μs
Next CDB byte access (byte 6 of 10)
T23.10.6
4.5-4
0.11 μs
0.12 μs
Next CDB byte access (byte 7 of 10)
T23.10.7
4.5-4
0.10 μs
0.10 μs
Next CDB byte access (byte 8 of 10)
T23.10.8
4.5-4
0.09 μs
0.10 μs
Next CDB byte access (byte 9 of 10)
T23.10.9
4.5-4
0.13 μs
0.14 μs
Next CDB byte access (byte 10 of 10)
T23.10.10
4.5-4
0.12 μs
0.12 μs