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Part Name
Description
BM29F040 View Datasheet(PDF) - Fujitsu
Part Name
Description
Manufacturer
BM29F040
FLASH MEMORY CMOS 4M (512K ×8) BIT
Fujitsu
BM29F040 Datasheet PDF : 40 Pages
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MBM29F040C
-55/-70/-90
Increment PLSCNT
Start
Setup Sector Addr.
(A
18
, A
17
, A
16
)
PLSCNT = 1
OE
=
V
ID
, A
9
=
V
ID
, CE
=
V
IL
Activate WE Pulse
Time out 100
µ
s
WE
=
V
IH
, CE
=
OE
=
V
IL
(A
9
should remain V
ID
)
No
PLSCNT = 25?
Yes
Remove V
ID
from A
9
Write Reset Command
Device Failed
Read from Sector
Addr. = SA, A
0
= 0, A
1
= 1, A
6
=
0
No
Data = 01H?
Yes
Yes
Protect Another Sector ?
No
Remove V
ID
from A
9
Write Reset Command
Sector Protection
Completed
Figure 7 Sector Protection Algorithm
35
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