Renesas H8S/2318 series, Руководство по оборудованию

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Rev. 5.00, 12/03, page 604 of 1088
CE
FWE
A
18
to A
0
I/O
5
to I/O
0
I/O
6
I/O
7
OE
WE
t
ests
t
erase
t
spa
t
dh
t
ds
t
f
t
r
t
wep
t
ens
t
enh
t
nxtc
t
nxtc
t
ceh
t
ces
Erase end identifi-
cation signal
Erase normal end
confirmation signal
H'20 H'20
H'00
Figure 17-27 Auto-Erase Mode Timing Waveforms
17.11.7 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 17-21 AC Characteristics in Status Read Mode
(Conditions: V
CC
= 3.3 V ±0.3 V, V
SS
= 0 V, T
a
= 25°C ±5°C)
Item Symbol Min Max Unit
Command write cycle t
nxtc
20 —
µ
s
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