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GD25B257D Datasheet(Arkusz danych) 10 Page - GigaDevice Semiconductor (Beijing) Inc.

Numer części GD25B257D
Szczegółowy opis  3.3V Uniform Sector Dual and Quad Serial Flash
Pobierz  92 Pages
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Producent  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Strona internetowa  http://www.gigadevice.com/
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 10 page
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3.3V Uniform Sector
Dual and Quad Serial Flash
GD25B257D
10
5. DATA PROTECTION
The GD25B257D 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/Software Reset (66H+99H)
-Write Disable (WRDI)
-Write Status Register (WRSR)
-Page Program (PP)
-Quad Page Program (QPP)
-Sector Erase (SE) / Block Erase (BE) / Chip Erase (CE)
Software Protection Mode:
-The Block Protect (BP3, BP2, BP1, and BP0) bits and Top Bottom (TB) bit define the section of the memory array
that can be read but cannot be changed.
Deep Power-Down Mode: In Deep Power-Down Mode, all commands are ignored except the Release from Deep
Power-Down Mode command and Software Reset (66H+99H).
Table 5. GD25B257D Protected area size
Status Register Content
Memory Content
TB
BP3
BP2
BP1
BP0
Blocks
Addresses
Density
Portion
X
0
0
0
0
NONE
NONE
NONE
NONE
0
0
0
0
1
511
01FF0000h-01FFFFFFh
64KB
Upper 1/512
0
0
0
1
0
510 to 511
01FE0000h-01FFFFFFh
128KB
Upper 1/256
0
0
0
1
1
508 to 511
01FC0000h-01FFFFFFh
256KB
Upper 1/128
0
0
1
0
0
504 to 511
01F80000h-01FFFFFFh
512KB
Upper 1/64
0
0
1
0
1
496 to 511
01F00000h-01FFFFFFh
1MB
Upper 1/32
0
0
1
1
0
480 to 511
01E00000h-01FFFFFFh
2MB
Upper 1/16
0
0
1
1
1
448 to 511
01C00000h-01FFFFFFh
4MB
Upper 1/8
0
1
0
0
0
384 to 511
01800000h-01FFFFFFh
8MB
Upper 1/4
0
1
0
0
1
256 to 511
01000000h-01FFFFFFh
16MB
Upper 1/2
1
0
0
0
1
0
00000000h-0000FFFFh
64KB
Lower 1/512
1
0
0
1
0
0 to 1
00000000h-0001FFFFh
128KB
Lower 1/256
1
0
0
1
1
0 to 3
00000000h-0003FFFFh
256KB
Lower 1/128
1
0
1
0
0
0 to 7
00000000h-0007FFFFh
512KB
Lower 1/64
1
0
1
0
1
0 to 15
00000000h-000FFFFFh
1MB
Lower 1/32
1
0
1
1
0
0 to 31
00000000h-001FFFFFh
2MB
Lower 1/16
1
0
1
1
1
0 to 63
00000000h-003FFFFFh
4MB
Lower 1/8
1
1
0
0
0
0 to 127
00000000h-007FFFFFh
8MB
Lower 1/4
1
1
0
0
1
0 to 255
00000000h-00FFFFFFh
16MB
Lower 1/2
X
1
1
0
X
ALL
00000000h-01FFFFFFh
32MB
ALL
X
1
X
1
X
ALL
00000000h-01FFFFFFh
32MB
ALL




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