6.2.2 PIO timings
The PIO cycle timings meet Mode 4 of the ATA/ATAPI-6 description.
t1
t9
t0
t2 t2i
t3 t4
t5 t6
t1
Read data
DD(15:0)
DIOR-,
DIOW-
CS(1:0)
DA(2:0)
Write data
DD(15:0)
tA
tB
IORDY
(*) Up to ATA-2
(mode-0,1,2)
Figure 23. PIO cycle timings chart
1250–IORDY pulse widthtB
35–IORDY set up timetA
-10DIOR–/DIOW– to address valid holdt9
–5DIOR– data holdt6
–20DIOR– data setupt5
–10DIOW– data holdt4
–20DIOW– data setupt3
–25DIOR–/DIOW– recovery timet2i
–70DIOR–/DIOW– pulse widtht2
–25Address valid to DIOR-/DIOW– setupt1
–120Cycle timet0
MAX (ns)MIN (ns)PARAMETER DESCRIPTION
Figure 24. PIO cycle timings
6.2.2.1 Write DRQ interval time
For write sectors and write multiple operations 3.8 µs is inserted from the end of negation of the DRQ bit
until setting of the next DRQ bit.
Deskstar 180GXP hard disk drive specifications
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