AT INTERFACE DESCRIPTION
5 – 3
T IM IN G PARAMET ERS
MODE 0
MODE 1
MODE 2
MODE 3
MODE 4
t0
Cycle Time ( min )
60 0 ns
38 3 ns
24 0 ns
18 0 ns
12 0 ns
t1
Ad dress vali d to DIOR-/D IOW - setup ( min)
70 ns
50 ns
30 ns
30 ns
25 ns
t2
D IOR- /DIOW- 16 -bi t ( min)
16 5 ns
12 5 ns
10 0 ns
80 ns
70 ns
t2 i
D IOR-/DIOW- re cover y ti me ( min )
70 ns
25 ns
t3
DIOW- data se tup ( min )
60 ns
45 ns
30 ns
30 ns
20 ns
t4
DIOW- da ta hold ( min)
30 ns
20 ns
15 ns
10 ns
10 ns
t5
D IOR- d ata setup ( min)
50 ns
35 ns
20 ns
20 ns
20 ns
t6
DIOW- da ta hold ( min)
5 ns
5 ns
5 ns
5 ns
5 ns
t6Z
D IOR- d ata tri state (max)
30 ns
30 ns
30 ns
30 ns
30 ns
t9
D IOR-/DIOW- to address va li d hold ( min )
20 ns
15 ns
10 ns
10 ns
10 ns
tRd
Re ad Data Va li d to IORDY a cti ve ( min )
0
0
0
0
0
tA
IORD Y Setup Ti me
35 ns
35 ns
35 ns
35 ns
35 ns
tB
IORDY Pulse Width (max)
12 50 ns
12 50 ns
12 50 ns
12 50 ns
12 50 ns
PIO Timing
PIO Timing
PIO Timing
PIO Timing
PIO Timing
Figure 5 - 2
PIO Data Transfer To/From Device
