IBM DTLA-305040 Hard Drive Specifications - Page 44

Ultra DMA timings

Get IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive PDF manuals and user guides View all IBM DTLA-305040 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 44 highlights

7.2.4 Ultra DMA timings The Ultra DMA timing meets Mode 0,1,2,3 4, and 5 of the Ultra DMA Protocol. 7.2.4.1 Initiating Read DMA DMARQ DMACKSTOP tUI tACK tENV tACK tENV HDMARDY- tZIORDY DSTROBE DD(15:00) tAZ xxxxxxxxxxxxxxxxxxxxxxxxx Host drives DD t2CYC tFS tCYC tCYC tZAD tDVS tDVH xxx RD Data xxx RD Data xxx RD Data Device drives DD Figure 26. Ultra DMA cycle timing chart (Initiating Read) tUI tACK tENV tZIORDY tFS tCYC t2CYC tAZ tZAD tDVS tDVH PARAMETER DESCRIPTION MODE0 MODE1 MODE2 MODE3 MODE4 MODE5 (all values in ns) MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX Unlimited interlock time 0 - 0 - 0 0 0 - 20 - 0 - Setup time before -DMACK Envelope time Wait time before driving DSTROBE 20 - 20 - 20 - 20 - - 20 - 20 70 20 70 20 70 20 55 20 55 20 50 0-0-0-0-0-0 - First strobe time Cycle time 2 cycle time Output release time - 230 - 200 - 170 - 130 - 120 - 90 112 - 73 - 54 - 39 - 25 - 16.8 - 230 - 153 - 115 - 86 - 57 - 38 - - 10 - 10 - 10 - 10 - 10 - 10 Output enable time 0-0-0-0-0-0 - Data setup time (at device side) 70 - 48 - 31 - 20 - 6.7 - 4.8 - Data hold time (at device side) 6.2 - 6.2 - 6.2 - 6.2 - 6.2 - 4.8 - Figure 27. Ultra DMA cycle timings (Initiating Read) Deskstar 40GV & 75GXP hard disk drive specifications 32

  • 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
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
7.2.4 Ultra DMA timings
The Ultra DMA timing meets Mode 0,1,2,3 4, and 5 of the Ultra DMA Protocol.
7.2.4.1
Initiating Read DMA
DSTROBE
HDMARDY-
DMACK-
DMARQ
STOP
tUI
tACK
tENV
tACK
tENV
tZIORDY
tFS
tCYC
tCYC
t2CYC
DD(15:00)
tZAD
tAZ
xxxxxxxxxxxxxxxxxxxxxxxxx
xxx
xxx
xxx
Host drives DD
Device drives DD
tDVH
tDVS
RD Data
RD Data
RD Data
Figure 26. Ultra DMA cycle timing chart (Initiating Read)
–
4.8
–
6.2
–
6.2
–
6.2
–
6.2
–
6.2
Data hold time (at device side)
tDVH
–
4.8
–
6.7
–
20
–
31
–
48
–
70
Data setup time (at device side)
tDVS
–
0
–
0
–
0
–
0
–
0
–
0
Output enable time
tZAD
10
–
10
–
10
–
10
–
10
–
10
–
Output release time
tAZ
–
38
–
57
–
86
–
115
–
153
–
230
2 cycle time
t2CYC
–
16.8
–
25
–
39
–
54
–
73
–
112
Cycle time
tCYC
90
–
120
–
130
–
170
–
200
–
230
–
First strobe time
tFS
–
0
–
0
–
0
–
0
–
0
–
0
Wait time before driving
DSTROBE
tZIORDY
50
20
55
20
55
20
70
20
70
20
70
20
Envelope time
tENV
–
20
–
–
20
–
20
–
20
–
20
Setup time before –DMACK
tACK
–
0
–
20
–
0
0
0
–
0
–
0
Unlimited interlock time
tUI
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MODE5
MODE4
MODE3
MODE2
MODE1
MODE0
PARAMETER DESCRIPTION
(all values in ns)
Figure 27. Ultra DMA cycle timings (Initiating Read)
Deskstar 40GV & 75GXP hard disk drive specifications
32