S29WS128J SPANSION, S29WS128J Datasheet - Page 24

• Manufacturer Part Number: S29WS128J
• Description: (S29WS064J / S29WS128J) Burst Mode Flash Memory
• Manufacturer: SPANSION

Advanced Sector Protection/Unprotection
24
Hardware Methods
3. N = Highest Address Sector.
(
Memory Array
All sectors locked)
sectors locked)
WP# = V
ACC = V
Sector N-2
Sector N-1
(All boot
Sector N
Sector 0
Sector 1
Sector 2
IL
IL
3
Figure 1. Advanced Sector Protection/Unprotection
0 = PPBs Locked
4. 0 = Sector Protected,
5. PPBs programmed individually,
1 = Sector Unprotected.
but cleared collectively
Protection Bit
S29WS128J/064J
PPB Lock Bit
64-bit Password
Persistent
Password Method
(One Time Protect)
(PPB)
PPB N-2
PPB N-1
PPB N
PPB 0
PPB 1
PPB 2
D a t a
Software Methods
(DQ2)
1 = PPBs Unlocked
4,5
(One Time Programmable)
Lock Register
1,2,3
S h e e t
Persistent Method
6. 0 = Sector Protected,
7. Protect effective only if PPB Lock Bit
8. Volatile Bits: defaults to user choice
(DQ1)
1 = Sector Unprotected.
is unlocked and corresponding PPB
is “1” (unprotected).
upon power-up (see ordering
options).
1. Bit is volatile, and defaults to “1” on
2. Programming to “0” locks all PPBs to
3. Once programmed to “0”, requires
Protection Bit
reset.
their current state.
hardware reset to unlock.
Dynamic
(PPB)
DYB N-2
DYB N-1
DYB N
DYB 0
DYB 1
DYB 2
6,7,8
S29WS-J_00_A4 June 24, 2005