Initiating Write Dma; Figure 44. Ultra Dma Cycle Timings (Initiating Write) - Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications

7.9.5 Initiating Write DMA

DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
DD(15:0)
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PARAMETER DESCRIPTION
tUI Unlimited interlock time
tACK Setup time for DMACK-
tENV Envelope time
Minimum time before driving
tZIORDY
IORDY
tLI Limited interlock time
tCYC Cycle time
t2CYC Two cycle time
tDS Data setup time at device
tDH Data Hold time at device

Figure 44. Ultra DMA cycle timings (Initiating Write)

tUI
tENV
tACK
tZIORDY
tACK
MODE 0
MIN
(ns)
0
20
20
0
0
112
230
15
5
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
tLI
tUI tCYC
WT Data xxx
Host drives DD
MODE 1 MODE 2
MAX MIN MAX MIN MAX
(ns) (ns) (ns) (ns)
– 0 – 0
– 20 – 20
70 20 70 20
– 0 – 0
150 0 150 0
– 73 – 54
– 154 – 115
– 10 – 7
– 5 – 5
54
t2CYC
tCYC
tDH
tDS
WT Data
xxx WT Data
MODE 3 MODE 4
MIN MAX MIN MAX
(ns) (ns) (ns) (ns) (ns)
– 0 – 0 –
– 20 – 20 –
70 20 55 20 55
– 0 – 0 –
150 0 100 0 100
– 39 – 25 –
– 86 – 57 –
– 7 – 5 –
– 5 – 5 –
MODE 5
MIN MAX
(ns) (ns)
0 –
20 –
20 55
0 –
0 75
16.8 –
38 –
4 –
4.6 –