GD25Q128CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
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5. DATA PROTECTION
The GD25Q128C provides the following data protection methods:
Write Enable (WREN) command: The WREN command is set the Write Enable Latch bit (WEL). The WEL
bit will return to reset by the following situation:
♦
- Power-Up
- Write Disable (WRDI)
- Write Status Register (WRSR)
- Page Program (PP)
- Sector Erase (SE) / Block Erase (BE) / Chip Erase (CE)
Software Protection Mode:
♦
- The Block Protect (BP4, BP3, BP2, BP1 and BP0) bits define the section of the memory array that can be
read but not change.
- Individual Block Protection bit provides the protection selection of each individual block and sectors in the
top and bottom block.
Hardware Protection Mode: WP# going low to protected the BP0~BP4 bits and SRP0~1 bits.
Deep Power-Down Mode: In Deep Power-Down Mode, all commands are ignored except the Release from
Deep Power-Down Mode command.
♦
♦
Table5.1. GD25Q128C Protected area size (WPS=0, CMP=0)
Status Register Content
Memory Content
BP4 BP3 BP2 BP1 BP0
Blocks
NONE
252 to 255
248 to 255
240 to 255
224 to 255
192 to 255
128 to 255
0 to 3
0 to 7
0 to 15
0 to 31
0 to 63
0 to 127
0 to 255
255
Addresses
Density
NONE
256KB
512KB
1MB
2MB
4MB
8MB
256KB
512KB
1MB
2MB
4MB
8MB
16MB
4KB
Portion
NONE
×
0
0
0
0
0
0
0
0
0
0
0
0
×
1
1
1
1
1
1
1
1
1
1
×
0
0
0
0
0
0
1
1
1
1
1
1
×
0
0
0
0
0
1
1
1
1
1
0
0
0
0
1
1
1
0
0
0
1
1
1
1
0
0
0
1
1
0
0
0
1
1
0
0
1
1
0
0
1
0
1
1
0
0
1
1
0
1
1
0
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
1
×
0
1
0
1
×
0
NONE
FC0000H-FFFFFFH
F80000H-FFFFFFH
F00000H-FFFFFFH
E00000H-FFFFFFH
C00000H-FFFFFFH
800000H-FFFFFFH
000000H-03FFFFH
000000H-07FFFFH
000000H-0FFFFFH
000000H-1FFFFFH
000000H-3FFFFFH
000000H-7FFFFFH
000000H-FFFFFFH
FFF000H-FFFFFFH
FFE000H-FFFFFFH
FFC000H-FFFFFFH
FF8000H-FFFFFFH
FF8000H-FFFFFFH
000000H-000FFFH
000000H-001FFFH
000000H-003FFFH
000000H-007FFFH
000000H-007FFFH
Upper 1/64
Upper 1/32
Upper 1/16
Upper 1/8
Upper 1/4
Upper 1/2
Lower 1/64
Lower 1/32
Lower 1/16
Lower 1/8
Lower 1/4
Lower 1/2
ALL
Top Block
Top Block
Top Block
Top Block
Top Block
Bottom Block
Bottom Block
Bottom Block
Bottom Block
Bottom Block
255
255
255
255
0
0
0
0
8KB
16KB
32KB
32KB
4KB
8KB
16KB
32KB
32KB
0
Rev.1.2
69 - 9
ELM [ ELM ELECTRONICS ]
