參數(shù)資料
型號: S29PL256N65FAW002
廠商: Spansion Inc.
英文描述: 256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
中文描述: 256/128/128字節(jié)(16/8/8 M中的x 16位),3.0伏的CMOS只同步讀/寫,頁模式閃存
文件頁數(shù): 50/85頁
文件大小: 940K
代理商: S29PL256N65FAW002
48
S29PL-N MirrorBit Flash Family
S29PL-N_00_A4 November 23, 2005
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 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 8.1
.
Figure 8.1 Advanced Sector Protection/Unprotection
Hardware Methods
Software Methods
WP# = V
IL
(All boot
sectors locked)
Password Method
(DQ2)
Persistent Method
(DQ1)
Lock Register
(One Time Programmable)
PPB Lock Bit
(
Notes 1, 2, 3
)
64-bit Password
(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
(Note 4)
PPB 0
PPB 1
PPB 2
PPB N-2
PPB N-1
PPB N
Persistent
Protection Bit (PPD)
(
Notes 5, 6
)
DYB 0
DYB 1
DYB 2
DYB N-2
DYB N-1
DYB N
Dynamic
Protection Bit (DYB)
(Notes 7, 8, 9)
Notes:
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.
4. N = Highest Address Sector.
5. 0 = Sector Protected,
1 = Sector Unprotected.
6. PPBs programmed individually, but cleared collectively.
7. 0 = Sector Protected,
1 = Sector Unprotected.
8. Protect effective only if PPB Lock Bit is unlocked and
corresponding PPB is 1 (unprotected).
9. Volatile Bits: defaults to user choice upon power-up
(see ordering options).
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S29PL256N65FAW003 制造商:SPANSION 制造商全稱:SPANSION 功能描述:256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
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