HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 611

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Notes on Use of Erase-Program Mode
17.13.7 Status Read Mode
Address
Auto-erase mode supports only entire memory erasing.
Do not perform a command write during auto-erasing.
Confirm normal end of auto-erasing by checking FO
be used for this purpose (FO
pin).
The status polling FO
the next command write is performed, reading is possible by enabling CE and OE.
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.
FWE
Data
FO
FO
WE
OE
CE
7
6
t
ens
t
t
ces
f
t
wep
Figure 17.32 Auto-Erase Mode Timing Waveforms
H'20
CL
t
ds
t
ceh
t
dh
in
6
t
r
and FO
t
nxtc
7
status polling uses the auto-erase operation end identification
7
pin information is retained until the next command write. Until
H'20
DL
in
t
erase
Erase normal end
confirmation signal
Erase end identification
signal
t
ests
(100 to 40000 ms)
6
. Alternatively, status read mode can also
t
spa
FO
0
to FO
t
enh
5
= 0
t
nxtc
599