IBM DTCA-24090 Hard Drive Specifications - Page 50
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 HIOR/ HIOW READ DATA WRITE DATA < TC > < T0 >: > TI < < TD < TE > > TJ < > > TF < < TG > TH < PARAMETER DESCRIPTION T0 Cycle time TC DMA active to +DMARQ inactive TD HIOR, HIOW pulse width TE HIOR data access TF HIOR data hold TG HIOW data setup TH HIOW data hold TI DMACK to HIOR/ HIOW setup TJ HIOR/ HIOW to DMACK hold Figure 25. D M A (Single Word) cycle timings MIN MAX Note (nsec) (nsec) 240 80 120 60 5 35 20 0 0 42 OEM Specifications of DTCA-2xxxx 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 <
HIOR/ HIOW
<
TD
>
<
TE
>
>
TF
<
READ DATA
<
TG
>
TH
<
WRITE DATA
PARAMETER DESCRIPTION
MIN
MAX
Note
(nsec) (nsec)
T0
Cycle time
240
TC
DMA active to +DMARQ inactive
80
TD
HIOR, HIOW pulse width
120
TE
HIOR data access
60
TF
HIOR data hold
5
TG
HIOW data setup
35
TH
HIOW data hold
20
TI
DMACK to
HIOR/ HIOW setup
0
TJ
HIOR/ HIOW to
DMACK hold
0
Figure 25. DMA (Single Word) cycle timings
42
OEM Specifications of DTCA-2xxxx 2.5 inch HDD