Hitachi H8/3664 Hardware Manual page 144

A15–A0
CE
OE
WE
I/O7–I/O0
Note: Do not enable WE and OE at the same time.
Figure 7.15 Timing Waveforms in Transition from Memory Read Mode to Another Mode
Table 7.16 AC Characteristics in Memory Read Mode (Conditions: V
V = 0 V, T
SS
Item
Access time
CE output delay time
OE output delay time
Output disable delay time
Data output hold time
A15–A0
CE
OE
WE
I/O7–I/O0
Figure 7.16 CE and OE Enable State Read Timing Waveforms
128
Memory read mode
Address stable
= 25°C ±5°C)
a
Symbol
t
acc
t
ce
t
oe
t
df
t
oh
Address stable
t
acc
Other mode command write
t
t
ces
nxtc
t
f
Min Max
— 20
— 150
— 150
— 100
5 —
Address stable
t
acc
t
oh
t
ceh
t
wep
t
f
t t
ds dh
= 5.0 V ±0.5 V,
CC
Unit Notes
µs Figure 7.16
ns Figure 7.17
ns
ns
ns
t
oh