s29cd-j Meet Spansion Inc., s29cd-j Datasheet - Page 41

• Manufacturer Part Number: s29cd-j
• Description: 32/16 Megabit Cmos 2.6 Volt Or 3.3 Volt-only Simultaneous Read/write, Dual Boot, Burst Mode Flash Memory With Versatilei/o?
• Manufacturer: Meet Spansion Inc.

March 7, 2007 S29CD-J_CL-J_00_B2
Hardware Methods
4. N = 23 for S29CD016J/CL016J,
31 for S29CD032J/CL032J.
(Two outermost sectors
locked in large bank)
Sector Group N-2
Sector Group N-1
Sector Group N
Memory Array
Sector Group 0
Sector Group 1
Sector Group 2
WP# = V
IL
D a t a
4
S h e e t
0 = PPBs Unlocked
Figure 9.1 Advanced Sector Protection/Unprotection
S29CD-J & S29CL-J Flash Family
5. PPBs programmed individually,
6. 0 = Sector Group Unprotected;
( P r e l i m i n a r y )
but cleared collectively.
1 = Sector Group Protected
Protection Bit
PPB Lock Bit
Persistent
64-bit Password
(One Time Protect)
Password Method
(PPB)
PPB N-2
PPB N-1
PPB N
PPB 0
PPB 1
PPB 2
5,6
Software Methods
1 = PPBs Locked
1,2,3
Persistent Method
7. Protect effective only if PPB Lock Bit is
8. Volatile Bits.
9. 0 = Sector Group Unprotected;
unlocked and corresponding PPB is “0”
(unprotected).
1 = Sector Group Protected
1. Bit is volatile, and defaults to “0” on reset.
2. Programming to “1” locks all PPBs to their
3. Once programmed to “1”, requires hardware
current state.
reset to unlock.
Protection Bit
Dynamic
DYB N-2
DYB N-1
(DYB)
DYB N
DYB 0
DYB 1
DYB 2
7,8,9
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