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Table 22.45 Bus Timing
Condition:
T
= –20°C to +75°C (regular specifications),
a
T
= –40°C to 85°C (wide-range specifications)
a
Condition A: V
= 5.0 V ± 10%, AV
CC
fmax = 20 MHz
Condition B: V
= 5.0 V ± 10%, AV
CC
fmax = 25 MHz
Item
Address delay time
Address hold time
Read strobe delay time
Address strobe delay time
Write strobe delay time
Strobe delay time
Write strobe pulse width 1
Write strobe pulse width 2
Address setup time 1
Address setup time 2
Read data setup time
Read data hold time
Write data delay time
Write data setup time 1
Write data setup time 2
Write data hold time
732
= 5.0 V ± 10%, V
CC
= 5.0 V ± 10%, V
CC
Condition
Symbol
Min
t
—
AD
t
0.5 t
– 20
AH
cyc
t
—
RSD
t
—
ASD
t
—
WSD
t
—
SD
t
1.0 t
– 25
WSW1
cyc
t
1.5 t
– 25
WSW2
cyc
t
0.5 t
– 20
AS1
cyc
t
1.0 t
– 20
AS2
cyc
t
25
RDS
t
0
RDH
t
—
WDD
t
1.0 t
– 30
WDS1
cyc
t
2.0 t
– 30
WDS2
cyc
t
0.5 t
– 15
WDH
cyc
= 4.5 to AV
REF
CC
= 4.5 to AV
REF
CC
A and B
Max
Unit
25
ns
—
ns
25
ns
25
ns
25
ns
25
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
35
ns
—
ns
—
ns
—
ns
, V
= AV
= 0 V,
SS
SS
, V
= AV
= 0 V,
SS
SS
Test
Conditions
Figure 22.23,
figure 22.24
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