Pio Timings; Figure 38. Pio Cycle Timings - Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications

7.7 PIO timings

The PIO cycle timings meet Mode 4 of the ATA-5 description.
CS(1:0)-
DA(2:0)
DIOR-,
DIOW-
Write data
DD(15:0)
Read data
DD(15:0)
IOCS16-(*)
IORDY
PARAMETER DESCRIPTION
t0 Cycle time
t1 Address valid to DIOR-/DIOW- setup
t2 DIOR-/DIOW- pulse width
t2i DIOR-/DIOW- recovery time
t3 DIOW- data setup
t4 DIOW- data hold
t5 DIOR- data setup
t6 DIOR- data hold
t6z DIOR- data tristate
t7(*) Address valid to IOCS16- assertion
t8(*) Address valid to IOCS16- released
t9 DIOR-/DIOW- to address valid hold
tRD Read data valid to IORDY active
tA IORDY setup width
tB IORDY pulse width

Figure 38. PIO cycle timings

t1
t7(*)
tA
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
t9
t0
t2
t3 t4
t5 t6 t6z
tRD
(*) Up to ATA-2 (mode-0,1,2)
tB
MIN (ns) MAX. (ns)
120 –
25 –
70 –
25 –
20 –
10 –
20 –
5 –
– 30
– 40
– 30
10 –
0 –
– 35
– 1,250
48
t2i
t8(*)