S29PL-N SPANSION [SPANSION], S29PL-N Datasheet - Page 50
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S29PL-N
Manufacturer Part Number
S29PL-N
Description
256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S29PL-N.pdf
(85 pages)
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8
48
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
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,
Notes:
1 = Sector Unprotected.
Memory Array
Sector N
Hardware Methods
Sector N-2
Sector N-1
Sector 0
Sector 1
Sector 2
(Note 4)
Figure 8.1 Advanced Sector Protection/Unprotection
sectors locked)
WP# = V
(All boot
S29PL-N MirrorBit™ Flash Family
IL
0 = PPBs Locked
P r e l i m i n a r y
Protection Bit (PPD)
PPB Lock Bit
Persistent
64-bit Password
Password Method
(Notes 5,
(One Time Protect)
PPB N-2
PPB N-1
PPB N
PPB 0
PPB 1
PPB 2
Software Methods
(DQ2)
6. PPBs programmed individually, but cleared collectively.
7. 0 = Sector Protected,
8. Protect effective only if PPB Lock Bit is unlocked and
9. Volatile Bits: defaults to user choice upon power-up
(Notes 1, 2,
1 = PPBs Unlocked
(One Time Programmable)
6)
1 = Sector Unprotected.
corresponding PPB is 1 (unprotected).
(see ordering options).
Lock Register
3)
Persistent Method
Protection Bit (DYB)
(DQ1)
S29PL-N_00_A4 November 23, 2005
(Notes 7, 8, 9)
Dynamic
DYB N-2
DYB N-1
DYB N
DYB 0
DYB 1
DYB 2
Figure
8.1.
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