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Rev. 1.0, 07/01, page 104 of 372
7.6.6 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.
3.
Table 7-13 shows the AC characteristics and 7-14 shows the return codes.
Table 7-13 AC Characteristics in Status Read Mode (Conditions: V
CC
= 5.0 V ±0.5 V,
V
SS
= 0 V, T
a
= 25°C ±5°C)
Item Symbol Min Max Unit Notes
Read time after command write t
nxtc
20 — µs Figure 7-12
CE hold time t
ceh
0—ns
CE setup time t
ces
0—ns
Data hold time t
dh
50 — ns
Data setup time t
ds
50 — ns
Write pulse width t
wep
70 — ns
OE output delay time t
oe
— 150 ns
Disable delay time t
df
— 100 ns
CE output delay time t
ce
— 150 ns
WE rise time t
r
—30ns
WE fall time t
f
—30ns
A15–A0
I/O7–I/O0
t
wep
t
f
t
r
t
oe
t
df
t
ds
t
ds
t
dh
t
dh
t
ces
t
ceh
t
ce
t
ceh
t
nxtc
t
nxtc
t
nxtc
t
ces
H'71
t
wep
t
f
t
r
H'71
Note: I/O2 and I/O3 are undefined.
Figure 7-12 Status Read Mode Timing Waveforms