s71pl512nd0 Meet Spansion Inc., s71pl512nd0 Datasheet - Page 46

• Manufacturer Part Number: s71pl512nd0
• Description: Two S29pl256n Devices 32 M X 16-bit Cmos 3.0-volt Only Simultaneous Read/write, Page-mode Flash Memory
• Manufacturer: Meet Spansion Inc.

10 Advanced Sector Protection/Unprotection
44
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
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.
10.1.
Memory Array
Sector N
Hardware Methods
Sector N-2
Sector N-1
Sector 0
Sector 1
Sector 2
(Note 4)
Figure 10.1 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
64-bit Password
Persistent
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
6)
(One Time Programmable)
1 = Sector Unprotected.
corresponding PPB is 1 (unprotected).
(see ordering options).
Lock Register
3)
Persistent Method
Protection Bit (DYB)
(DQ1)
S29PL-N_M0_A4 November 23, 2005
(Notes 7, 8, 9)
Dynamic
DYB N-2
DYB N-1
DYB N
DYB 0
DYB 1
DYB 2