Hitachi 7K250 Specifications - Page 65
Multi word DMA timings
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7.7 Multi word DMA timings The Multiword DMA timings meet Mode 2 of the ATA/ATAPI-6 description. CS0-/CS1DMARQ DMACKDIOR-/DIOWREAD DATA WRITE DATA tM t0 tI tD tN tLR/tLW tJ tKR/tKW tE tG tF tZ tG tH PARAMETER DESCRIPTION t0 Cycle time tD DIOR-/DIOW- asserted pulse width tE DIOR- data access tF DIOR- data hold tG DIOR-/DIOW- data setup tH DIOW- data hold tI DMACK- to -DIOR-/DIOW- setup tJ DIOR-/DIOW- to DMACK- hold tKR/tKW DIOR-/DIOW- negated pulse width tLR/tLW DIOR-/DIOW- to DMARQ- delay tM CS (1:0) valid to DIOR-/DIOWtN CS (1:0) tZ DMACK- to read data released MIN (ns) 120 70 - 5 20 10 0 5 25 - 25 10 - MAX (ns) - - 50 35 25 Figure 3: Multiword DMA cycle timings Deskstar 7K250 Hard Disk Drive Specification 51
![](/manual_guide/products/hitachi-7k250-specifications-51f2e5f/65.png)
Deskstar 7K250 Hard Disk Drive Specification
51
7.7
Multi word DMA timings
The Multiword DMA timings meet Mode 2 of the ATA/ATAPI-6 description.
Figure 3: Multiword DMA cycle timings
PARAMETER DESCRIPTION
MIN (ns)
MAX (ns)
t0
Cycle time
120
–
tD
DIOR-/DIOW- asserted pulse width
70
–
tE
DIOR- data access
–
50
tF
DIOR- data hold
5
–
tG
DIOR-/DIOW- data setup
20
–
tH
DIOW- data hold
10
–
tI
DMACK- to -DIOR-/DIOW- setup
0
–
tJ
DIOR-/DIOW- to DMACK- hold
5
–
tKR/tKW
DIOR-/DIOW- negated pulse width
25
–
tLR/tLW
DIOR-/DIOW- to DMARQ- delay
–
35
tM
CS (1:0) valid to DIOR-/DIOW-
25
-
tN
CS (1:0)
10
-
tZ
DMACK- to read data released
–
25
WRITE DATA
READ DATA
DMACK-
DMARQ
DIOR-/DIOW-
t0
tLR/tLW
tJ
tI
tD
tKR/tKW
tF
tG
tH
tG
tZ
CS0-/CS1-
tM
tN
tE