7.2.2 PIO timings
The PIO cycle timings meet Mode 4 of the ATA/ATAPI-4 description.
IOCS16-(*)
t1
t9
t0
t2
t2i
t3
t4
t5
t6
t8(*)
t7(*)
t1
t10
t11
Read data
DD0-15
DIOR-,
DIOW-
CS0-,CS1-
DA0-2
Write data
DD0-15
IORDY
(*) Up to ATA-2 (mode-0,1,2)
Figure 22. PIO cycle time chart
1250
–
IORDY pulse width
t11
35
–
DIOR-, DIOW- low to IORDY low
t10
-
10
DIOR-, DIOW- high to CS0-, CS1-, DA0-2 hold
t9
30
–
CS0-, CS1-, DA0–02 invalid to IOCS16- negation
t8(*)
40
–
CS0-, CS1-, DA0–02 valid to IOCS16- assertion
t7(*)
–
5
DIOR- high to DD0–15 hold
t6
–
20
DD0–15 setup to DIOR- high
t5
–
10
DIOW- high to DD00–15 hold
t4
–
20
DD00–15 setup to DIOW- high
t3
–
25
DIOR-, DIOW- recovery
t2i
–
70
DIOR-, DIOW- pulse width
t2
–
25
CS0- CS1-, DA00–02 valid to DIOR-, DIOW- active
t1
–
120
Cycle time
t0
MAX (ns)
MIN (ns)
PARAMETER DESCRIPTION
Figure 23. PIO cycle timings
Deskstar 40GV & 75GXP hard disk drive specifications
29
Содержание DTLA-305040 - Deskstar 41.1 GB Hard Drive
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