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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
abnormal end occurs in auto-program mode or auto-erase mode.
2. The return code is retained until a command write other than a status read mode command
write is executed.
Table 20-17 AC Characteristics in Status Read Mode (Conditions: V
V
= 0 V, T
SS
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
A18–A0
t
CE
OE
WE
I/O7–I/O0
Note: I/O2 and I/O3 are undefined.
706
= 25°C ±5°C)
a
Symbol
t
nxtc
t
ceh
t
ces
t
dh
t
ds
t
wep
t
oe
t
df
t
ce
t
r
t
f
t
t
t
ces
ceh
nxtc
ces
t
wep
t
t
f
r
t
t
ds
dh
H'71
Figure 20-24 Status Read Mode Timing Waveforms
Min
20
0
0
50
50
70
—
—
—
—
—
t
t
ceh
nxtc
t
wep
t
t
f
r
t
t
ds
dh
H'71
= 5.0 V ±0.5 V,
CC
Max
Unit
—
µs
—
ns
—
ns
—
ns
—
ns
—
ns
150
ns
100
ns
150
ns
30
ns
30
ns
t
t
ce
t
oe
t
df
nxtc
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