6.7 Multiword DMA timings
The Multiword DMA timings meet Mode 2 of the ATA/ATAPI-6 description.
Table 23: Multiword DMA cycle timing chart
CS0-/CS1-
DMARQ
DMACK-
DIOR-/DIOW-
READ DATA
WRITE DATA
Table 24: Multiword DMA cycle timings
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-/DIOW-
tN
CS (1:0)
tZ
DMACK- to read data released
tM
tI
tD
tE
tG
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
tLR/tLW
t0
tKR/tKW
tG
tF
tH
34
tN
tJ
tZ
MIN (ns)
MAX (ns)
120
–
70
–
–
50
5
–
20
–
10
–
0
–
5
–
25
–
–
35
25
-
10
-
–
25