10.4.4 Multiword DMA Read Timing

DMARQ

tOtL

-DMACK

tI

tD

tK

tJ

-DIOR

tZ

tE

DD15∼DD0

tF

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

tC

DMACK to DMARQ delay

 

---

---

---

tD

-DIOR 16-bit

215

 

80

70

tE

-DIOR data access

 

150

60

50

tF

-DIOR data hold

5

 

5

5

tZ

-DIOR to tristate

 

20

25

25

tI

DMACK to -DIOR setup

0

 

0

0

tJ

-DIOR to DMACK hold

20

 

5

5

tK

-DIOR negated pulse width

50

 

50

25

tL

-DIOR to DMARQ delay

 

120

40

35

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