HD6432646 Hitachi, HD6432646 Datasheet - Page 735

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Table 20-14 AC Characteristics in Memory Read Mode (Conditions: V
Item
Access time
CE output delay time
OE output delay time
Output disable delay time
Data output hold time
Figure 20-19 Timing Waveforms in Transition from Memory Read Mode to Another Mode
I/O7–I/O0
I/O7–I/O0
Note: Do not enable WE and OE at the same time.
A18–A0
A18–A0
WE
WE
OE
CE
OE
V
CE
Figure 20-20 CE and OE Enable State Read Timing Waveforms
SS
= 0 V, T
V
V
V
IL
IL
IH
a
Memory read mode
= 25°C ±5°C)
Address stable
t
acc
Address stable
Symbol
t
t
t
t
t
acc
ce
oe
df
oh
t
oh
t
nxtc
Min
—
—
—
—
5
Other mode command write
t
acc
Address stable
t
ces
t
f
Max
20
150
150
100
—
t
wep
t
t
oh
CC
ds
= 5.0 V ±0.5 V,
t
ceh
t
r
Unit
µs
ns
ns
ns
ns
t
dh
701