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
Содержание Deskstar 7K250
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