Pio Timings; Write Drq Interval Time - Hitachi 7K250 - Deskstar - Hard Drive Specifications

7.6 PIO timings

The PIO cycle timings meet Mode 4 of the ATA/ATAPI-6 description.
CS(1:0)-
DA(2:0)
DIOR-,
DIOW -
W rite data
DD(15:0)
Read data
DD(15:0)
IOCS16-(*)
IORDY
t0
t1
t2
t2i
t3
t4
t5
t6
t9
tA
tB

7.6.1 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.
t1
t7(*)
tA
PARAMETER DESCRIPTION
Cycle time
Address valid to DIOR-/DIOW- setup
DIOR-/DIOW- pulse width
DIOR-/DIOW- recovery time
DIOW- data setup
DIOW- data hold
DIOR- data setup
DIOR- data hold
DIOR-/DIOW- to address valid hold
IORDY setup width
IORDY pulse width
Figure 2: PIO cycle timings
Deskstar 7K250 Hard Disk Drive Specification
t9
t0
t2 t2i
t3 t4
t5 t6
t6z
tRD
(*) Up to ATA-2 (mode-0,1,2)
tB
MIN (ns)
120
25
70
25
20
10
20
10
49
t8(*)
MAX (ns)
–
–
–
–
–
–
–
5 –
–
– 35
– 1250