HD6432621 Hitachi, HD6432621 Datasheet - Page 703

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Table 19-15 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 19-19 Timing Waveforms in Transition from Memory Read Mode to Another Mode
I/O7–I/O0
Note: Do not enable WE and OE at the same time.
I/O7–I/O0
A18–A0
A18–A0
WE
OE
CE
WE
OE
V
CE
Figure 19-20 CE and OE Enable State Read Timing Waveforms
SS
= 0 V, T
V
V
V
IL
IL
IH
Memory read mode
a
= 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
ds
CC
= 3.3 V ±0.3 V,
t
ceh
t
r
Unit
µs
ns
ns
ns
ns
t
dh
659