HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 868

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 19 ROM
19.20.6 Auto-Erase Mode
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Rev.6.00 Sep. 27, 2007 Page 838 of 1268
REJ09B0220-0600
I/O
A
also be used for this purpose (the I/O
erase operation).
as the next command write has not been performed, reading is possible by enabling CE and OE.
5
18
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
Status polling I/O
to I/O
FWE
to A
I/O
I/O
WE
OE
CE
0
7
6
0
t
pns
t
Figure 19.52 Auto-Program Mode Timing Waveforms
ces
t
f
6
and I/O
t
ds
t
wep
H'40
7
t
ceh
t
pin information is retained until the next command write. As long
r
t
dh
t
nxtc
7
status polling pin is used to identify the end of an auto-
Address stable
t
as
1 byte to 128 bytes
t
ah
Data transfer
6
. Alternatively, status read mode can
t
wsts
t
write
t
spa
H'00
t
Programming operation
end identification signal
Programming normal
end identification signal
pnh
t
nxtc