IBM IC35L020 Hard Drive Specifications - Page 45
Multiword DMA timings, WRITE DATA, READ DATA, DMACK, DMARQ, DIOR-/DIOW, CS0-/CS1
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9.1.6 Multiword DMA timings The Multiword DMA timing meets Mode 2 of the ATA/ATAPI-5 description. CS0-/CS1- tM tN DMARQ DMACKDIOR-/DIOWREAD DATA WRITE DATA tL t0 tI tD tK tG tF tG tH tJ tZ Parameter descriptions t0 Cycle time tD DIOR-, DIOW- asserted pulse width tE DIOR- data access tF DIOR- data hold tG DIOR-/DIOW- data setup tH DIOW- data hold tI DMACK- to -DIOR/-DIOW setup tJ DIOR-/DIOW- to DMACK- hold tK DIOR-/DIOW- negated pulse width tL DIOR-/DIOW- to DMARQ- delay tM CS (1:0) valid to DIOR-/DIOW- tN CS (1:0) hold tZ DMACK- to read data released MIN. (ns) 120 70 50 5 20 10 0 5 25 - 25 10 - MAX. (ns) 35 - - 25 Figure 26. Multiword DMA cycle timings Deskstar 60 GXP Hard disk drive specification 31
9.1.6
Multiword DMA timings
The Multiword DMA timing meets Mode 2 of the ATA/ATAPI-5 description.
WRITE DATA
READ DATA
DMACK-
DMARQ
DIOR-/DIOW-
t0
tL
tJ
tI
tD
tK
tF
tG
tH
tG
tZ
CS0-/CS1-
tM
tN
25
–
DMACK- to read data released
tZ
–
10
CS (1:0) hold
tN
–
25
CS (1:0) valid to DIOR–/DIOW–
tM
35
–
DIOR-/DIOW- to DMARQ– delay
tL
–
25
DIOR-/DIOW- negated pulse width
tK
–
5
DIOR-/DIOW- to DMACK- hold
tJ
–
0
DMACK- to –DIOR/–DIOW setup
tI
–
10
DIOW- data hold
tH
–
20
DIOR-/DIOW– data setup
tG
–
5
DIOR- data hold
tF
–
50
DIOR- data access
tE
–
70
DIOR-, DIOW- asserted pulse width
tD
–
120
Cycle time
t0
MAX. (ns)
MIN. (ns)
Parameter descriptions
Figure 26. Multiword DMA cycle timings
Deskstar
60 GXP Hard disk drive specification
31