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10.4.6 Multiword DMA Read Timing
ATA/ATAPI-5 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