參數(shù)資料
型號: S29GL128P90TFIV12
廠商: Spansion Inc.
英文描述: 3.0 Volt-only Page Mode Flash Memory featuring 90 nm MirrorBit Process Technology
中文描述: 3.0伏只頁面模式閃存具有90納米MirrorBit工藝技術(shù)
文件頁數(shù): 42/77頁
文件大?。?/td> 2121K
代理商: S29GL128P90TFIV12
42
S29GL-P MirrorBit
Flash Family
S29GL-P_00_A7 November 8, 2007
D a t a
S h e e t
( P r e l i m i n a r y )
8.
Advanced Sector Protection/Unprotection
The Advanced Sector Protection/Unprotection feature disables or enables programming or erase operations
in any or all sectors and can be implemented through software and/or hardware methods, which are
independent of each other. This section describes the various methods of protecting data stored in the
memory array. An overview of these methods in shown in
Figure 8.1
.
Figure 8.1
Advanced Sector Protection/Unprotection
Hardware Methods
Software Methods
WP#/ACC = V
IL
(Highe
s
t or Lowe
s
t
S
ector Locked)
P
ass
word Method
(DQ2)
Per
s
i
s
tent Method
(DQ1)
Lock Regi
s
ter
(One Time Progr
a
mm
ab
le)
PPB Lock Bit
1,2,
3
64-
b
it P
ass
word
(One Time Protect)
1 = PPB
s
Unlocked
0 = PPB
s
Locked
Memory Arr
a
y
S
ector 0
S
ector 1
S
ector 2
S
ector N-2
S
ector N-1
S
ector N
3
PPB 0
PPB 1
PPB 2
PPB N-2
PPB N-1
PPB N
Per
s
i
s
tent
Protection Bit
(PPB)
4,5
DYB 0
DYB 1
DYB 2
DYB N-2
DYB N-1
DYB N
Dyn
a
mic
Protection Bit
(DYB)
6,7,
8
6. 0 =
S
ector Protected,
1 =
S
ector Unprotected.
7. Protect effective only if PPB Lock Bit i
s
u
nlocked
a
nd corre
s
ponding PPB i
s
“1
(
u
nprotected).
8
. Vol
a
tile Bit
s
: def
au
lt
s
to
us
er choice
u
pon
power-
u
p (
s
ee ordering option
s
).
4. 0 =
S
ector Protected,
1 =
S
ector Unprotected.
5. PPB
s
progr
a
mmed individ
ua
lly,
bu
t cle
a
red collectively
1. Bit i
s
vol
a
tile,
a
nd def
au
lt
s
to
1
on re
s
et.
2. Progr
a
mming to
0
lock
s
a
ll PPB
s
to their
c
u
rrent
s
t
a
te.
3
. Once progr
a
mmed to
0
, re
qu
ire
s
h
a
rdw
a
re
re
s
et to
u
nlock.
3
. N = Highe
s
t Addre
ss
S
ector.
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