Status Read Mode - Renesas H8/38024 Hardware Manual

A15−A0
CE
OE
WE
I/O7
I/O6
I/O5−I/O0
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 = 3.3 V ±0.3 V, V
CC
Item
Read time after command write
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
ces ceh nxtc
t
wep
t t
f r
t t
ds dh
H'20
Figure 6.18 Auto-Erase Mode Timing Waveforms
= 0 V, T
SS
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
ests spa
t
erase
Erase end
decision signal
Erase normal
end
decision signal
H'20
= 25°C ±5°C
a
Min Max
20 —
0 —
0 —
50 —
50 —
70 —
— 150
— 100
— 150
— 30
— 30
Rev. 6.00, 08/04, page 181 of 628
t
nxtc
H'00
Unit Notes
µs Figure 6.19
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns