GD25Q64 Datasheet, PDF (8/50 Pages) ELM Electronics – 3.3V Uniform Sector Dual and Quad Serial Flash

GD25Q64CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash
5. DATA PROTECTION
http://www.elm-tech.com
The GD25Q64C 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.
♦ 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.
Table1.0 GD25Q64C Protected area size (CMP=0)
Status Register Content
Memory Content
BP4 BP3 BP2 BP1 BP0
××000
00001
00010
00011
00100
00101
00110
01001
01010
01011
01100
01101
01110
××111
10001
10010
10011
1010×
10110
11001
11010
11011
1110×
11110
Blocks
NONE
126 to 127
124 to 127
120 to 127
112 to 127
96 to 127
64 to 127
0 to 1
0 to 3
0 to 7
0 to 15
0 to 31
0 to 63
0 to 127
127
127
127
127
127
0
0
0
0
0
Addresses
NONE
7E0000H-7FFFFFH
7C0000H-7FFFFFH
780000H-7FFFFFH
700000H-7FFFFFH
600000H-7FFFFFH
400000H-7FFFFFH
000000H-01FFFFH
000000H-03FFFFH
000000H-07FFFFH
000000H-0FFFFFH
000000H-1FFFFFH
000000H-3FFFFFH
000000H-7FFFFFH
7FF000H-7FFFFFH
7FE000H-7FFFFFH
7FC000H-7FFFFFH
7F8000H-7FFFFFH
7F8000H-7FFFFFH
000000H-000FFFH
000000H-001FFFH
000000H-003FFFH
000000H-007FFFH
000000H-007FFFH
Density
NONE
128KB
256KB
512KB
1MB
2MB
4MB
128KB
256KB
512KB
1MB
2MB
4MB
8MB
4KB
8KB
16KB
32KB
32KB
4KB
8KB
16KB
32KB
32KB
Portion
NONE
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
50 - 8
Rev.1.1