Hitachi H8S/2645, Hardware Manual

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701
CE
A18–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 write Memory read mode
Figure 20-19 Timing Waveforms in Transition from Memory Read Mode to Another Mode
Table 20-14 AC Characteristics in Memory Read Mode (Conditions: V
CC
= 5.0 V ±0.5 V,
V
SS
= 0 V, T
a
= 25°C ±5°C)
Item Symbol Min Max Unit
Access time t
acc
— 20 µs
CE
output delay time t
ce
— 150 ns
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
A18–A0
OE
WE
I/O7–I/O0
V
IL
V
IL
V
IH t
acc
t
acc
t
oh
t
oh
Address stable Address stable
Figure 20-20
CE
and
OE
Enable State Read Timing Waveforms