Rev. 2.0, 11/00, page 213 of 1037
CE
FWE
ADDRESS
FO5 to FO0
FO6
FO7
OE
WE
t
erase
(100 to 40000ms)
t
ests
t
spa
t
nxtc
t
nxtc
t
ces
t
ceh
t
dh
CL
in
DL
in
t
ds
t
wep
t
ens
FO0 to 5 = 0
H'20
H'20
t
enh
Erase end
identification signal
Erase normal end
identification signal
t
f
t
r
Figure 8.21 Auto-Erase Mode Timing Waveforms
8.8.7
Status Read Mode
(1) 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.
(2) The return code is retained until a command write for other than status read mode is
performed.
Table 8.17 AC Characteristics in Status Read Mode
(Conditions: V
CC
= 5.0 V
±
10%, V
SS
= 0 V, Ta = 25
°
C
±
5
°
C)
Item
Symbol
Min
Max
Unit
Command write cycle
t
nxtc
20
µ
s
&(
hold time
t
ceh
0
ns
&(
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
2(
output delay time
t
oe
150
ns
Disable delay time
t
df
100
ns
&(
output delay time
t
ce
150
ns
:(
rise time
t
r
30
ns
:(
fall time
t
f
30
ns
Summary of Contents for Hitachi H8S/2191
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