Da ta
Shee t
(Prelimi nar y)
– Write Disable (WRDI)
– Write Status Register (WRSR)
Software Protected Mode (SPM):
The Block Protect (BP2, BP1, BP0) bits define the section of the
memory array that can be read but not programmed or erased.
and
show the sizes and
address ranges of protected areas that are defined by Status Register bits BP2:BP0.
Hardware Protected Mode (HPM):
The Write Protect (W#) input and the Status Register Write Disable
(SRWD) bit together provide write protection.
Clock Pulse Count:
The device verifies that all program, erase, and Write Status Register commands
consist of a clock pulse count that is a multiple of eight before executing them.
Table 7.1
S25FL040A Protected Area Sizes (Top Boot)
Status Register
Block Protect Bits
BP2
0
0
0
0
1
1
1
1
BP1
0
0
1
1
0
0
1
1
BP0
0
1
0
1
0
1
0
1
Protected
Address Range
None
7C000–7FFFF
78000–7FFFF
70000–7FFFF
60000–7FFFF
40000–7FFFF
00000–7FFFF
00000–7FFFF
Memory Array
Protected
Sectors
(0) None
(1) SA12
(2) SA12:SA11
(6) SA12:SA7
(7) SA12:SA6
(9) SA12:SA4
(13) SA12:SA0
(13) SA12:SA0
Unprotected
Address Range
00000–7FFFF
00000–7BFFF
00000–77FFF
00000–6FFFF
00000–5FFFF
00000–3FFFF
None
None
Unprotected
Sectors
SA12:SA0
SA11:SA0
SA10:SA0
SA6:SA0
SA5:SA0
SA3:SA0
None
None
Protected Portion of
Total Memory Area
None (0)
Upper 1/32 (16 KB)
Upper 1/16 (32 KB)
Upper 1/8 (64 KB)
Upper 1/4 (128 KB)
Upper 1/2 (256 KB)
All (512 KB)
All (512 KB)
Table 7.2
S25FL040A Protected Area Sizes (Bottom Boot)
Status Register
Block Protect Bits
BP2
0
0
0
0
1
1
1
1
BP1
0
0
1
1
0
0
1
1
BP0
0
1
0
1
0
1
0
1
Protected
Address Range
None
00000–03FFF
00000–07FFF
00000–0FFFF
00000–1FFFF
00000–3FFFF
00000–7FFFF
00000–7FFFF
Memory Array
Protected
Sectors
(0)
(1) SA0
(2) SA1:SA0
(6) SA5:SA0
(7) SA6:SA0
(9) SA8:SA0
(13) SA12:SA0
(13) SA12:SA0
Unprotected
Address Range
00000–7FFFF
04000–7FFFF
08000–7FFFF
10000–7FFFF
20000–7FFFF
40000–7FFFF
None
None
Unprotected
Sectors
SA12:SA0
SA12:SA1
SA12:SA2
SA12:SA4
SA12:SA5
SA12:SA7
None
None
Protected Portion of
Total Memory Area
0
Lower 1/32 (16 KB)
Lower 1/16 (32 KB)
Lower 1/8 (64 KB)
Lower 1/4 (128 KB)
Lower 1/2 (256 KB)
All (512 KB)
All (512 KB)
August 31, 2006 S25FL040A_00_B0
S25FL040A
11
SPANSION [ SPANSION ]
