Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 900 of 1268
REJ09B0220-0600
Address stable
CE
FWE
A
18
to A
0
I/O
5
to I/O
0
I/O
6
I/O
7
OE
WE
t
as
t
ah
t
dh
t
ds
t
f
t
r
t
wep
t
wsts
t
write
t
spa
t
pns
t
pnh
t
nxtc
t
nxtc
t
ceh
t
ces
Programming operation
end identification signal
Data transfer
1 byte to 128 bytes
H'40
H'00
Programming normal
end identification signal
Figure 19.82 Auto-Program Mode Timing Waveforms
19.29.6 Auto-Erase Mode
• Auto-erase mode supports only total memory erasing.
• Do not perform a command write during auto-erasing.
• Confirm normal end of auto-erasing by checking I/O
6
. Alternatively, status read mode can also
be used for this purpose (the I/O
7
status polling pin is used to identify the end of an auto-erase
operation).
• Status polling I/O
6
and I/O
7
pin information is retained until the next command write. As long
as the next command write has not been performed, reading is possible by enabling CE and
OE.