Renesas H8/38024 Series, Руководство по оборудованию

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Rev. 6.00, 08/04, page 181 of 628
CE
A15
−
A0
OE
WE
I/O7
I/O6
I/O5
−
I/O0
t
wep
t
ds
t
dh
t
f
t
r
t
ests
t
erase
t
spa
t
ces
t
ceh
t
nxtc
t
nxtc
H'20 H'20 H'00
Erase end
decision signal
Erase normal
end
decision signal
Figure 6.18 Auto-Erase Mode Timing Waveforms
6.10.6 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 6.19 shows the AC characteristics and 6.20 shows the return codes.
Table 6.19 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 Notes
Read time after command write t
nxtc
20 — µs Figure 6.19
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