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Section 18 ROM
Table 18.15 AC Characteristics in Transition from Memory Read Mode
to Another Mode
(Conditions: V
= 5.0 V ±10%, V
CC
Item
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
WE rise time
WE fall time
A16-0
CE
OE
WE
I/O7-0
Note: Do not enable WE and OE simultaneously
Figure 18.19 Transition From Memory Read Mode to Another Mode
Rev. 4.00 Jan 26, 2006 page 650 of 938
REJ09B0276-0400
= 0 V, T
= 25°C ±5°C)
SS
a
Symbol
Min
t
20
nxtc
t
0
ceh
t
0
ces
t
50
dh
t
50
ds
t
70
wep
t
—
r
t
—
f
Memory read mode
ADDRESS STABLE
Max
Unit
—
µs
—
ns
—
ns
—
ns
—
ns
—
ns
30
ns
30
ns
Another mode command write
t
t
nxtc
ces
t
wep
tf
Notes
t
ceh
tr
t
t
ds
dh
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