HD6432646 Hitachi, HD6432646 Datasheet - Page 734

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

Table 20-13 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
700
I/O7–I/O0
Note: Data is latched on the rising edge of WE.
A18–A0
WE
OE
OE
CE
CE
Figure 20-18 Timing Waveforms for Memory Read after Memory Write
(Conditions: V
Command write
t
ces
CC
t
f
= 5.0 V ±0.5 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
Min
20
0
0
50
50
70
—
—
= 0 V, T
a
= 25°C ±5°C)
Memory read mode
Address stable
Max
—
—
—
—
—
—
30
30
Unit
µs
ns
ns
ns
ns
ns
ns
ns