Initiating Write Dma; Table 27: Ultra Dma Cycle Timing Chart (Initiating Write) - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

6.9.5 Initiating Write DMA

Table 27: Ultra DMA cycle timing chart (Initiating Write)

DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
DD(15:0)
PARAMETER
DESCRIPTION
(all values in ns)
tUI Unlimited interlock time
tACK Setup time for DMACK-
tENV Envelope time
tZIORDY Minimum time before
driving IORDY
tLI Limited interlock time
tCYC Cycle time
t2CYC Two cycle time
tDS Data setup time at
device
tDH Data Hold time at device
tUI
tENV
tACK
tZIORDY
tACK
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
MODE 0 MODE 1
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
0 – 0
20 – 20
20 70 20
0 – 0
0 150 0
112 – 73
230 – 154
15 – 10
5 – 5
Deskstar T7K500 Hard Disk Drive Specification
tLI
tUI
WT Data
Host drives DD
MODE 2 MODE 3
– 0 – 0
– 20 – 20
70 20 70 20
– 0 – 0
150 0 150 0 100
– 54 – 39
– 115 – 86
– 7 – 7
– 5 – 5
36
t2CYC
tCYC tCYC
tDH
tDS
WT Data
xxx xxx WT Data
MODE 4 MODE 5
– 0 – 0
– 20 – 20
55 20 55 20
– 0 – 0
0 100 0
– 25 – 16.8
– 57 – 38
– 5 – 4
– 5 – 4.6
MODE 6
– 0 –
– 20 –
55 20 50
– 0 –
75 0 60
– 13.0 –
– 29 –
– 2.6 –
– 3.5 –