Seagate Medalist ST31082A, Руководство по эксплуатации продукта

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Chapter 5 Host Interface
Page 28 ST3636A/ST31082A/ST31276A
Host PI0 16-Bit Timing Values
The values* in the table below refer to the timing diagram in figure 5-3.
Symbo
l Parameter Units Min: Typ Max: Unit:
T1 A[0:2] active until -IOCS16 active 20 ns
T2 A[0:2] inactive until -IOCS16 inactive 8 ns
T3 -CS0 or -CS1 active until -IOR or -IOW 10 ns
T4 -CS0 or -CS1 active after -IOR or IOW 10 ns
T5 -IOW or -IOR pulse width 60 ns
T6 Read Data active after -IOR active 30 ns
T7 Read Data active after -IOR inactive 5 ns
T8 Write Data active until -IOW inactive 20 ns
T9 Write Data active after -IOW inactive 10 ns
T10 -IOR or -IOW active until -IOCHRDY 30 ns
T11 -IOCHRDY pulse width 1,250 ns
T12
-IOR/-IOW cycle time (w/ IOCHRDY) 120 ns
* Under conditions equivalent to a 330 ohm pullup and a 56pf load. Cable type and length
may affect the values measured at the drive or host interface.
Figure 5-3
Interface PIO Timing Diagram
T
10
T
1
T
3
T
5
T
4
T
6
T
7
T
9
T
8
T
2
A[0:2]
-HCS0/-HCS1
-IOCS16
-IOR/-IOW
HDB[0:15]
(read)
HDB[0:15]
(write)
-IOR/-IOW
-IOR or -IOW CYCLE TIME
S541_5_3
T
11
T
12
-IOCHRDY