HD6432646 Hitachi, HD6432646 Datasheet - Page 740
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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20.11.6 Status Read Mode
1. Status read mode is provided to identify the kind of abnormal end. Use this mode when an
2. The return code is retained until a command write other than a status read mode command
Table 20-17 AC Characteristics in Status Read Mode (Conditions: V
Item
Read time after command write
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
OE output delay time
Disable delay time
CE output delay time
WE rise time
WE fall time
706
I/O7–I/O0
Note: I/O2 and I/O3 are undefined.
A18–A0
abnormal end occurs in auto-program mode or auto-erase mode.
write is executed.
WE
OE
CE
V
SS
= 0 V, T
t
Figure 20-24 Status Read Mode Timing Waveforms
ces
t
f
t
ds
t
a
wep
= 25°C ±5°C)
H'71
t
t
ceh
r
t
dh
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
nxtc
nxtc
ceh
ces
dh
ds
wep
oe
df
ce
r
f
t
ces
t
f
t
ds
t
wep
H'71
t
ceh
Min
20
0
0
50
50
70
—
—
—
—
—
t
r
t
dh
t
nxtc
t
ce
Max
—
—
—
—
—
—
150
100
150
30
30
t
oe
CC
= 5.0 V ±0.5 V,
Unit
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
df
t
nxtc
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