Multiword Dma Timings; Figure 24. Multiword Dma Cycle Timing Chart; Figure 25. Multiword Dma Cycle Timings - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

7.2.3 Multiword DMA timings

The Multiword DMA timing meets Mode 2 of the ATA/ATAPI-4 description.
CS0-/CS1-
DMARQ
DMACK-
DIOR-/DIOW-
READ DATA
WRITE DATA

Figure 24. Multiword DMA cycle timing chart

PARAMETER DESCRIPTION
t0 Cycle time
tD DIOR–, DIOW– 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- delay
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 tristate

Figure 25. Multiword DMA cycle timings

tM
tI tD
tG
tG
Deskstar 40GV & 75GXP hard disk drive specifications
tL
t0
tK
tF
tH
MIN (ns)
120
70
50
5
20
10
0
5
25
–
25
10
–
31
tN
tJ
tZ
MAX (ns)
–
–
–
–
–
–
–
–
–
35
–
–
25