HD6432621 Hitachi, HD6432621 Datasheet - Page 708

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

19.11.6 Status Read Mode
1. Status read mode is provided to identify the kind of abnormal end. Use this mode when an
2. The return code is retained until a command write other than a status read mode command
Table 19-18 AC Characteristics in Status Read Mode (Conditions: V
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
664
I/O7–I/O0
Note: I/O2 and I/O3 are undefined.
A18–A0
abnormal end occurs in auto-program mode or auto-erase mode.
write is executed.
WE
OE
CE
V
SS
= 0 V, T
t
Figure 19-24 Status Read Mode Timing Waveforms
ces
t
f
t
ds
t
a
wep
= 25°C ±5°C)
H'71
t
t
ceh
r
t
dh
t
nxtc
Symbol
t
t
t
t
t
t
t
t
t
t
t
nxtc
ceh
ces
dh
ds
wep
oe
df
ce
r
f
t
ces
t
f
t
ds
t
wep
H'71
t
ceh
t
r
Min
20
0
0
50
50
70
—
—
—
—
—
t
dh
t
nxtc
t
ce
t
Max
—
—
—
—
—
—
150
100
150
30
30
oe
CC
= 3.3 V ±0.3 V,
Unit
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
df
t
nxtc