HD6432621 Hitachi, HD6432621 Datasheet - Page 702
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
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Table 19-14 AC Characteristics in Transition from Memory Read Mode to Another Mode
Item
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
WE rise time
WE fall time
658
I/O7–I/O0
Note: Data is latched on the rising edge of WE.
A18–A0
WE
OE
OE
CE
CE
Figure 19-18 Timing Waveforms for Memory Read after Memory Write
(Conditions: V
Command write
t
ces
CC
t
f
= 3.3 V ±0.3 V, V
t
t
wep
ds
Symbol
t
t
t
t
t
t
t
t
nxtc
ceh
ces
dh
ds
wep
r
f
t
ceh
t
r
t
dh
t
SS
nxtc
= 0 V, T
Min
20
0
0
50
50
70
—
—
a
= 25°C ±5°C)
Memory read mode
Address stable
Max
—
—
—
—
—
—
30
30
Unit
µs
ns
ns
ns
ns
ns
ns
ns
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