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GD5F1GQ4REFJS Datasheet(PDF) 42 Page - GigaDevice Semiconductor (Beijing) Inc.

No. de pieza GD5F1GQ4REFJS
Descripción Electrónicos  SPI(x1/x2/x4) NAND Flash
PDF  60 Pages
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Fabricante Electrónico  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Página de inicio  http://www.gigadevice.com/
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SPI(x1/x2/x4) NAND Flash
1G
42
13.2 Block Protection
The block lock feature provides the ability to protect the entire device, or ranges of blocks, from the PROGRAM and
ERASE operations. After power-up, the device is in the
“locked” state, i.e., feature bits BP0, BP1and BP2 are set to 1, INV,
CMP and BRWD are set to 0. To unlock all the blocks, or a range of blocks, the SET FEATURES command must be issued
to alter the state of protection feature bits. When BRWD is set and WP# is LOW, none of the writable protection feature
bits can be set. Also, when a PROGRAM/ERASE command is issued to a locked block, status bit OIP remains 0. When an
ERASE command is issued to a locked block, the erase failure, 04H, is returned. When a PROGRAM command is issued
to a locked block, program failure, 08h, is returned.
Table13-2. Block Lock Register Block Protect Bits
CMP
INV
BP2
BP1
BP0
Protect Rows
Protect Rows
1G
x
x
0
0
0
NONE
None
—all unlocked
0
0
0
0
1
FC00h ～ FFFFh
Upper 1/64 locked
0
0
0
1
0
F800h ～ FFFFh
Upper 1/32 locked
0
0
0
1
1
F000h ～ FFFFh
Upper 1/16 locked
0
0
1
0
0
E000h ～ FFFFh
Upper 1/8 locked
0
0
1
0
1
C000h ～ FFFFh
Upper 1/4 locked
0
0
1
1
0
8000h ～ FFFFh
Upper 1/2 locked
x
x
1
1
1
0000h ～ FFFFh
All locked (default)
0
1
0
0
1
0000h ～ 03FFh
Lower 1/64 locked
0
1
0
1
0
0000h ～ 07FFh
Lower 1/32 locked
0
1
0
1
1
0000h ～ 0FFFh
Lower 1/16 locked
0
1
1
0
0
0000h ～ 1FFFh
Lower 1/8 locked
0
1
1
0
1
0000h ～ 3FFFh
Lower 1/4 locked
0
1
1
1
0
0000h ～ 7FFFh
Lower 1/2 locked
1
0
0
0
1
0000h ～ FBFFh
Lower 63/64 locked
1
0
0
1
0
0000h ～ F7FFh
Lower 31/32 locked
1
0
0
1
1
0000h ～ EFFFh
Lower 15/16 locked
1
0
1
0
0
0000h ～ DFFFh
Lower 7/8 locked
1
0
1
0
1
0000h ～ BFFFh
Lower 3/4 locked
1
0
1
1
0
0000h ～ 003Fh
Block0
1
1
0
0
1
0400h ～ FFFFh
Upper 63/64 locked
1
1
0
1
0
0800h ～ FFFFh
Upper 31/32 locked
1
1
0
1
1
1000h ～ FFFFh
Upper 15/16 locked
1
1
1
0
0
2000h ～ FFFFh
Upper 7/8 locked
1
1
1
0
1
4000h ～ FFFFh
Upper 3/4 locked
1
1
1
1
0
0000h ～ 003Fh
Block0
When WP# is not LOW, user can issue bellows commands to alter the protection states as want.
• Issue SET FEATURES register write (1FH)
• Issue the feature bit address (A0h) and the feature bits combination as the table



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