Hitachi H8/3692 ユーザーズマニュアル
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.
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
—
30
ns
WE
fall time
t
f
—
30
ns
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