參數(shù)資料
型號(hào)： S70WS512N00BFWAB2
廠商： Spansion Inc.
英文描述： Same-Die Stacked Multi-Chip Product (MCP) 512 Megabit (32M x 16 bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst-mode Flash Memory
中文描述： 同硅晶片堆疊多芯片產(chǎn)品（MCP）的512兆位（32兆× 16位）的CMOS 1.8伏，只有同時(shí)讀/寫(xiě)，突發(fā)模式閃存
文件頁(yè)數(shù)： 50/93頁(yè)
文件大?。?/td> 846K
代理商： S70WS512N00BFWAB2
March 14, 2005 S70WS512N00_00_A0
S70WS512N00 Based MCPs
51
A d v a n c e I n f o r m a t i o n
9 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 meth-
ods, 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 9.1
.
Figure 9.1 Advanced Sector Protection/Unprotection
Hardw are Methods
Softw are Methods
ACC = V
IL
(
All sectors locked)
WP# = V
IL
(All boot
sectors locked)
Password Method
(DQ2)
Persistent Method
(DQ1)
Lock Register
(One Time Programmable)
PPB Lock Bit
1,2,3
64-bit Passw ord
(One Time Protect)
1 = PPBs Unlocked
0 = PPBs Locked
Memory Array
Sector 0
Sector 1
Sector 2
Sector N-2
Sector N-1
Sector N
3
PPB 0
PPB 1
PPB 2
PPB N-2
PPB N-1
PPB N
Persistent
Protection Bit
( PPB)
4,5
DYB 0
DYB 1
DYB 2
DYB N-2
DYB N-1
DYB N
Dynamic
Protection Bit
( PPB)
6,7,8
6. 0 = Sector Protected,
1 = Sector Unprotected.
7. Protect effective only if PPB Lock Bit
is unlocked and corresponding PPB
is “1” (unprotected).
8. Volatile Bits: defaults to user choice
upon power-up (see ordering
options).
4. 0 = Sector Protected,
1 = Sector Unprotected.
5. PPBs programmed individually,
but cleared collectively
1. Bit is volatile, and defaults to “1” on
reset.
2. Programming to “0” locks all PPBs to
their current state.
3. Once programmed to “0”, requires
hardware reset to unlock.
3. N = Highest Address Sector.
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