Initiating Write Dma; Table 32: Ultra Dma Cycle Timing (Initiating Write) - Hitachi IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD Specifications

7.9.5 Initiating Write DMA

DMARQ
DMACK-
STOP
DDMARDY-
HSTROBE
DD(15:0)

Table 32: Ultra DMA cycle timing (Initiating Write)

PARAMETER DESCRIPTION
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
MIN
(ns)
0
20
20
0
0
112
230
15
5
Travelstar 80GN Hard Disk Drive Specification
tLI
tUI
WT Data
Host drives DD
MODE 1 MODE 2
MAX MIN MAX MIN
(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
51
t2CYC
tCYC tCYC
tDH
tDS
WT Data
xxx xxx WT Data
MODE 3 MODE 4
MAX MIN MAX MIN
(ns) (ns) (ns) (ns)
– 0 – 0
– 20 – 20
70 20 55 20
– 0 – 0
150 0 100 0
– 39 – 25
– 86 – 57
– 7 – 5
– 5 – 5
MODE 5
MAX MIN MAX
(ns) (ns) (ns)
– 0 –
– 20 –
55 20 55
– 0 –
100 0 75
– 16.8 –
– 38 –
– 4 –
– 4.6 –