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A
to A
18
0
CE
OE
WE
I/O
7
I/O
6
I/O
to I/O
5
0
17.20.7 Status Read Mode
• Status read mode is used to identify what type of abnormal end has occurred. Use this mode
when an abnormal end occurs in auto-program mode or auto-erase mode.
• The return code is retained until a command write for other than status read mode is
performed.
Table 17-42 AC Characteristics in Status Read Mode
(Conditions: V
Item
Command write cycle
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
t
t
t
nxtc
ces
ceh
t
wep
t
t
f
r
t
t
ds
dh
H'20
Figure 17-57 Auto-Erase Mode Timing Waveforms
= 3.3 V ±0.3 V, V
CC
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
spa
ests
t
erase
Erase end identifi-
cation signal
Erase normal end
confirmation signal
H'00
H'20
= 0 V, T
= 25°C ±5°C)
SS
a
Min
Max
20
—
0
—
0
—
50
—
50
—
70
—
—
150
—
100
—
150
—
30
—
30
Rev. 5.00, 12/03, page 659 of 1088
t
nxtc
Unit
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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