IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Multiword DMA Timings; Figure 42. Multiword DMA Cycle Timings

7.8 Multiword DMA timings
The Multiword DMA timings meet Mode 2 of the ATA-5 description.
WRITE DD(15:0)
READ DD(15:0)
DMACK-
DMARQ
DIOR-/DIOW-
t0
tLR/tLW
tJ
tI
tD
tKR/tKW
tF
tG
tH
tG
tZ
tE
25
–
DMACK- to read data released
tZ
35
–
DIOR- to DMARQ delay / DIOW- to DMARQ delay
tLR/tLW
–25DIOR- negated pulse width / DIOW- negated pulse
width
tKR/tKW
–
5
DIOR-/DIOW- to DMACK- hold
tJ
–
0
DMACK- to DIOR-/DIOW- setup
tI
–
10
DIOW- data hold
tH
–
20
DIOR-/DIOW- data setup
tG
–
5
DIOR- data hold
tF
50
–
DIOR- data access
tE
–
70
DIOR-/DIOW- asserted pulse width
tD
–
120
Cycle time
t0
MAX (ns)
MIN (ns)
PARAMETER DESCRIPTION
Figure 42. Multiword DMA cycle timings
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
53