Multiword Dma Timings; Figure 26. Multiword Dma Cycle Timings - IBM IC35L020 - Deskstar 20 GB Hard Drive Specifications

9.1.6 Multiword DMA timings

The Multiword DMA timing meets Mode 2 of the ATA/ATAPI-5 description.
CS0-/CS1-
DMARQ
DMACK-
DIOR-/DIOW-
READ DATA
WRITE DATA
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
tK DIOR-/DIOW- negated pulse width
tL DIOR-/DIOW- to DMARQ– delay
tM CS (1:0) valid to DIOR–/DIOW–
tN CS (1:0) hold
tZ DMACK- to read data released

Figure 26. Multiword DMA cycle timings

tM
tI tD
Parameter descriptions
Deskstar 60 GXP Hard disk drive specification
tL
t0
tK
tG tF
tH
tG
MIN. (ns)
120
70
50
5
20
10
0
5
25
–
25
10
–
31
tN
tJ
tZ
MAX. (ns)
–
–
–
–
–
–
–
–
–
35
–
–
25