IBM DTTA-351010 Hard Drive Specifications - Page 35
DMA Timings
View all IBM DTTA-351010 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 35 highlights
6.2.3 DMA Timings 6.2.3.1 Single Word DMA Timings The Single Word DMA timing meets Mode 2 of the ATA-2 description. +DMARQ DMACK HIOR/ HIOW 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 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 19. Single Word D M A cycle timings MIN 240 120 5 35 20 0 0 [nsec] MAX Note 80 60 Specification 27
6.2.3
DMA Timings
6.2.3.1
Single Word DMA Timings
The Single Word DMA timing meets Mode 2 of the ATA-2 description.
<
TC
>
+DMARQ
<
T0
>
DMACK
> TI <
> TJ <
HIOR/ HIOW
<
TD
>
<
TE
>
>
TF
<
READ DATA
<
TG
>
TH
<
WRITE DATA
[nsec]
PARAMETER DESCRIPTION
MIN
MAX
Note
T0
Cycle time
240
TC
DMACK 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 19. Single Word DMA cycle timings
Specification
27