S25FL032A Meet Spansion Inc., S25FL032A Datasheet - Page 12

• Manufacturer Part Number: S25FL032A
• Description: 32 Megabit Cmos 3.0 Volt Flash Memory With 50 Mhz Spi Bus Interface
• Manufacturer: Meet Spansion Inc.

7.6
12
Data Protection Modes
Spansion SPI Flash memory devices provide the following data protection methods:
BP2
The Write Enable (WREN) command: Must be written prior to any command that modifies data. The
WREN command sets the Write Enable Latch (WEL) bit. The WEL bit resets (disables writes) on power-up
or after the device completes the following commands:
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.
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.
0
0
0
0
1
1
1
1
– Page Program (PP)
– Sector Erase (SE)
– Bulk Erase (BE)
– Write Disable (WRDI)
– Write Status Register (WRSR)
Block Protect Bits
Status Register
BP1
0
0
1
1
0
0
1
1
BP0
0
1
0
1
0
1
0
1
3C0000h–3FFFFFh
3F0000h–3FFFFFh
3E0000h–3FFFFFh
380000h–3FFFFFh
300000h–3FFFFFh
200000h–3FFFFFh
000000h–3FFFFFh
Address Range
Protected
None
Table 7.1 S25FL032A Protected Area Sizes
S25FL032A
D a t a
(16) SA63:SA48
(32) SA63:SA32
(2) SA63:SA62
(4) SA63:SA60
(8) SA63:SA56
(64) SA63:SA0
Protected
(1) SA63
Sectors
(0)
Memory Array
S h e e t
000000h–3FFFFFh
000000h–3EFFFFh
000000h–3DFFFFh
000000h–3BFFFFh
000000h–2FFFFFh
000000h–1FFFFFh
000000h–37FFFFh
Address Range
Unprotected
Table 7.1
None
shows the sizes and address
S25FL032A_00_C2 July 2, 2007
Unprotected
SA63:SA0
SA62:SA0
SA61:SA0
SA59:SA0
SA55:SA0
SA47:SA0
SA31:SA0
Sectors
None
Total Memory
Protected
Portion of
Area
1/64
1/32
1/16
1/8
1/4
1/2
All
0