Multi Word Dma Timings; Table 24. Multiword Dma Cycle Timing Chart; Table 25. Multiword Dma Cycle Timings - Hitachi 7K400 - Deskstar Hard Drive Specifications

6.7 Multi word DMA timings

The Multiword DMA timings meet Mode 2 of the ATA/ATAPI-6 description.
Table 24: Multiword DMA cycle timing chart
CS0-/CS1-
DMARQ
DMACK-
DIOR-/DIOW-
READ DATA
WRITE DATA
Table 25: 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
t0
tI tD
tG
tE
tH
tG
Deskstar 7K400 Hard Disk Drive Specification
34
tLR/tLW
tKR/tKW
tF
MIN (ns)
120
70
–
5
20
10
0
5
25
–
25
10
–
tN
tJ
tZ
MAX (ns)
–
–
50
–
–
–
–
–
–
35
-
-
25