Dma Timings; Dma Timings (Single Word) - IBM DYLA-28100 - Travelstar 8.1 GB Hard Drive Specifications
(8190/7920/6440 mb) 2.5-inch hard disk drive with ata interface
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6.8 DMA Timings
6.8.1 DMA Timings (Single Word)
The Single Word D M A timing meets Mode 2 of the ATA-3 description.
+ D M A R Q
D M A C K
D I O R / D I O W
R E A D D A T A
W R I T E D A T A
P A R A M E T E R D E S C R I P T I O N
T 0
C y c l e t i m e
T C
D M A a c t i v e t o + D M A R Q i n a c t i v e
T D
D I O R , D I O W p u l s e w i d t h
T E
D I O R d a t a a c c e s s
T F
D I O R d a t a h o l d
T G
D I O W d a t a s e t u p
T H
D I O W d a t a h o l d
T I
D M A C K t o
T J
D I O R / D I O W t o
Figure 25. D M A (Single Word) cycle timings
<
T C
>
<
> T I <
<
<
T E
>
<
D I O R / D I O W s e t u p
D M A C K h o l d
T 0
> T J <
T D
>
>
T F
<
T G
>
T H
<
M I N
( n s e c ) ( n s e c )
Electrical Interface Specifications
> :
M A X
N o t e
2 4 0
8 0
1 2 0
6 0
5
3 5
2 0
0
0
43
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