Specification

PIO data transfer
PIO timing requirements
PIO timing parameters Mode 0
ns
Mode 1
ns
Mode 2
ns
Mode 3
ns
Mode 4
ns
t
0
Cycle time (min) 600 383 240 180 120
t
1
Address valid to DIOR
-
/DIOW
-
setup
(min)
70
50
30
30
25
t
2
DIOR
-
/DIOW
-
(min)
165
125
100
80
70
t
2i
DIOR
-
/DIOW
-
recovery time
(min)
-
-
-
70
25
t
3
DIOW- data setup (min) 60 45 30 30 20
t
4
DIOW- data hold (min) 30 20 15 10 10
t
5
DIOR- data setup (min) 50 35 20 20 20
t
6
DIOR
-
data hold
(min)
5
5
5
5
5
t
6Z
DIOR
-
data tristate
(max)
30
30
30
30
30
t
9
DIOR
-
/DIOW
-
to address valid hold
(min)
20
15
10
10
10
t
RD
Read Data Valid to IORDY active
(if IORDY initially low after t
A
)
(min) 0 0 0 0 0
t
A
IORDY Setup time 35 35 35 35 35
t
B
IORDY Pulse Width (max) 1250 1250 1250 1250 1250
t
C
IORDY assertion to release
(max)
5
5
5
5
5