Deskstar 7K400 Hard Disk Drive Specification
32
6.6 PIO timings
The PIO cycle timings meet Mode 4 of the ATA/ATAPI-6 description.
Table 23: PIO cycle timings chart
6.6.1 Write DRQ interval time
For write sectors and write multiple operations 3.8 ms is inserted from the end of negation of the DRQ bit until set-
ting of the next DRQ bit.
PARAMETER DESCRIPTION
MIN (ns)
MAX (ns)
t0
Cycle time
120
–
t1
Address valid to DIOR-/DIOW- setup
25
–
t2
DIOR-/DIOW- pulse width
70
–
t2i
DIOR-/DIOW- recovery time
25
–
t3
DIOW- data setup
20
–
t4
DIOW- data hold
10
–
t5
DIOR- data setup
20
–
t6
DIOR- data hold
5
–
t9
DIOR-/DIOW- to address valid hold
10
–
tA
IORDY setup width
–
35
tB
IORDY pulse width
–
1250
IOCS16-(*)
t9
t0
t2
t2i
t3
t4
t5
t8(*)
t7(*)
t1
tB
Read data
DD(15:0)
DIOR-,
DIOW -
CS(1:0)-
DA(2:0)
W rite data
DD(15:0)
IORDY
(*) Up to ATA-2 (mode-0,1,2)
t6z
tRD
tA
t6
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