4 multiword dma read timing – Toshiba 3006GAL User Manual
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10.4.4 Multiword DMA Read Timing
ATA/ATAPI-6 SPECIFICATIONS
Transfer mode
MODE 0
MODE 1
MODE 2
Symbol Meaning Min.
Max.
Min.
Max.
Min.
Max.
t0
Cycle time
480
150
120
t
C
DMACK to DMARQ delay
---
---
---
t
D
-DIOR
16-bit
215
80
70
t
E
-DIOR data access
150
60
50
t
F
-DIOR data hold
5
5
5
t
Z
-DIOR to tristate
20
25
25
t
I
DMACK to -DIOR setup
0
0
0
t
J
-DIOR to DMACK hold
20
5
5
t
K
-DIOR negated pulse width
50
50
25
t
L
-DIOR to DMARQ delay
120
40
35
t
E
t
L
-DMACK
t
F
t
K
t
J
t
I
DMARQ
-DIOR
DD15
∼DD0
t
O
t
D
t
Z