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參數資料
| 型號： | S29CL032J0PQAN102 |
| 廠商： | SPANSION LLC |
| 元件分類： | PROM |
| 英文描述： | 1M X 32 FLASH 3.3V PROM, 54 ns, PQFP80 |
| 封裝： | PLASTIC, MO-108CB-1, QFP-80 |
| 文件頁數： | 38/78頁 |
| 文件大小： | 1825K |
| 代理商： | S29CL032J0PQAN102 |
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September 27, 2006 S29CD-J_CL-J_00_B1
S29CD-J & S29CL-J Flash Family
41
Pr el im i n a r y
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
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
9.1.
Figure 9.1 Advanced Sector Protection/Unprotection
Hardware Methods
Software Methods
WP# = VIL
(Two outermost sectors
locked in large bank)
PPB Lock Bit
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
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
(DYB)
6,7,8
5. Protect effective only if PPB Lock Bit
is unlocked and corresponding PPB
is “0” (unprotected).
6. Volatile Bits.
4. 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.
Password Method
(DQ2)
Persistent Method
(DQ1)
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