IBM DTCA-24090 Hard Drive Specifications - Page 52

Ultra DMA Timings

Get IBM DTCA-24090 - Travelstar 4.1 GB Hard Drive PDF manuals and user guides View all IBM DTCA-24090 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 52 highlights

6.5.3 Ultra DMA Timings The Ultra DMA timing meets Mode 0, 1 and 2 of the Ultra DMA/33 -- a Proposal for a New Protocol in ATA/ATAPI-4 (X3T13/D96153 Revision 1) 6.5.3.1 Initiating Read DMA DMARQ DMACK STOP HDMARDY DSTROBE DB(15:00) < Tui > Tzrdy > < < < Tfs > < T2cyc > Tcyc > < Tcyc > Taz < > XXXXXXXXXXXXXXX > Host drives DB < > Tzad > Tdvs Tdvh < XXX RD Data XXX RD Data XXX RD Data < Device drives DB PARAMETER DESCRIPTION Tui Tack Tenv Tzrdy Tfs Tcyc T2cyc Taz Tzad Tdvs Tdvh Unlimited interlock time Setup time before DMACK assertion Envelope time Wait time before driving DSTROBE First strobe time Cycle Time 2 Cycle time Output release time Output enable time Data setup time (at device side) Data Hold time (at device side) Figure 27. Ultra D M A cycle timings (Initiating Read) [nsec] MODE0 MODE1 MODE2 MIN MAX MIN MAX MIN MAX 0 0 0 20 20 20 20 70 20 70 20 70 0 0 0 0 230 0 200 0 170 114 75 55 235 156 117 10 10 10 0 0 0 70 48 34 6 6 6 44 OEM Specifications of DTCA-2xxxx 2.5 inch H D D

  • 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
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
6.5.3
Ultra DMA Timings
The Ultra DMA timing meets Mode 0, 1 and 2 of the Ultra DMA/33 -- a Proposal for a New Protocol in
ATA/ATAPI-4 (X3T13/D96153 Revision 1)
6.5.3.1
Initiating Read DMA
DMARQ
<
Tui
>
DMACK
<Tack> <Tenv>
STOP
<Tack> <Tenv>
HDMARDY
<
T2cyc
>
Tzrdy >
<
<
Tfs
><
Tcyc
><
Tcyc
>
DSTROBE
Taz < >
< > Tzad
> Tdvs Tdvh <
DB(15:00)
XXXXXXXXXXXXXXX
XXX
RD Data
XXX
RD Data
XXX
RD Data
>
<
Host drives DB
Device drives DB
[nsec]
MODE0
MODE1
MODE2
PARAMETER DESCRIPTION
MIN
MAX
MIN
MAX
MIN
MAX
Tui
Unlimited interlock time
0
0
0
Tack
Setup time before
DMACK assertion
20
20
20
Tenv
Envelope time
20
70
20
70
20
70
Tzrdy
Wait time before driving DSTROBE
0
0
0
Tfs
First strobe time
0
230
0
200
0
170
Tcyc
Cycle Time
114
75
55
T2cyc
2 Cycle time
235
156
117
Taz
Output release time
10
10
10
Tzad
Output enable time
0
0
0
Tdvs
Data setup time (at device side)
70
48
34
Tdvh
Data Hold time
(at device side)
6
6
6
Figure 27. Ultra DMA cycle timings (Initiating Read)
44
OEM Specifications of DTCA-2xxxx 2.5 inch HDD