Datasheet

Section 6 ROM
Rev. 6.00 Aug 04, 2006 page 192 of 680
REJ09B0145-0600
CE
A15−A0
OE
WE
I/O7−I/O0
Note: Do not enable WE and OE at the same time.
t
ceh
t
wep
t
f
t
r
t
ces
t
nxtc
Address stable
t
ds
t
dh
Other mode command writeMemory read mode
Figure 6.14 Timing Waveforms in Transition from Memory Read Mode to Another Mode
Table 6.17 AC Characteristics in Memory Read Mode
Conditions: V
CC
= 3.3 V ±0.3 V, V
SS
= 0 V, T
a
= 25°C ±5°C
Item Symbol Min Max Unit Notes
Access time t
acc
— 20 µs Figure 6.15
CE output delay time t
ce
— 150 ns Figure 6.16
OE output delay time t
oe
— 150 ns
Output disable delay time t
df
— 100 ns
Data output hold time t
oh
5—ns
CE
A15−A0
OE
WE
I/O7−I/O0
t
acc
t
acc
t
oh
t
oh
Address stableAddress stable
Figure 6.15 CE
CECE
CE and OE
OEOE
OE Enable State Read Timing Waveforms