IBM DBCA-204860 Hard Drive Specifications - Page 48
DMA Timings Single Word
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6.5.1 DMA Timings (Single Word) The Single Word DMA timing meets Mode 2 of the ATA-3 description. +DMARQ DMACK DIOR/ DIOW READ DATA WRITE DATA < TC > < T0 >: > TI < < TD < TE > > TJ < > > TF < < TG > TH < PARAMETER DESCRIPTION T0 Cycle time TC DMACK active to +DMARQ inactive TD DIOR, DIOW pulse width TE DIOR data access TF DIOR data hold TG DIOW data setup TH DIOW data hold TI DMACK to DIOR/ DIOW setup TJ DIOR/ DIOW to DMACK hold Figure 26. D M A (Single Word) cycle timings MIN MAX Note (nsec) (nsec) 240 80 120 60 5 35 20 0 0 40 OEM Specifications of DBCA-2xxxxx 2.5 inch H D D
6.5.1
DMA Timings (Single Word)
The Single Word DMA timing meets Mode 2 of the ATA-3 description.
+DMARQ
<
TC
>
<
T0
>:
DMACK
> TI <
> TJ <
DIOR/ DIOW
<
TD
>
<
TE
>
>
TF
<
READ DATA
<
TG
>
TH
<
WRITE DATA
PARAMETER DESCRIPTION
MIN
MAX
Note
(nsec) (nsec)
T0
Cycle time
240
TC
DMACK active to +DMARQ inactive
80
TD
DIOR, DIOW pulse width
120
TE
DIOR data access
60
TF
DIOR data hold
5
TG
DIOW data setup
35
TH
DIOW data hold
20
TI
DMACK to
DIOR/ DIOW setup
0
TJ
DIOR/ DIOW to
DMACK hold
0
Figure 26. DMA (Single Word) cycle timings
40
OEM Specifications of DBCA-2xxxxx 2.5 inch HDD