M29F800FB5AN6E2 View Datasheet(PDF) - Micron Technology
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M29F800FB5AN6E2 Datasheet PDF : 55 Pages
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M29FxxxFT/B
Block Protection Operations
Block Protection Operations
Block protection can be used to prevent any operation from modifying the data stored
in the Flash memory. Each Block can be protected individually. Once protected, Pro-
gram and Erase operations on the block fail to change the data. Block protection status
of the device is read using the AUTO SELECT command.
Two techniques for controlling block protection are explained here: Programmer tech-
nique and In-System technique.
Note: A third technique for controlling block protection, Temporary Unprotection, is
described in the Signal Descriptions table, RP pin (Reset/Block Temporary Unprotec-
tion).
Unlike the Command Interface of the Program/Erase Controller, the techniques for pro-
tecting and unprotecting blocks could change between different Flash memory suppli-
ers.
Table 7: Block and Chip Protection Signal Settings
Signals
Block Protect
CE#
L
OE#
WE#
VID
L pulse
Address Input, 8-Bit and 16-Bit
A[MAX:16]
Block base address
A15
A14
A13
A12
A11
X
A10
X
A9
VID
A8
X
A7
X
A6
X
A5
X
A4
X
A3
X
A2
X
A1
X
A0
X
Data I/O, 8-Bit and 16-Bit
Chip Unprotect
VID
VID
L pulse
X
H
X
X
H
X
X
VID
X
X
X
X
X
X
X
X
X
Verify Block Protec-
tion
L
L
H
Verify Block Unpro-
tect
L
L
H
Block base address
Block base address
X
X
X
X
VID
VID
X
X
X
X
L
H
X
X
X
X
X
X
X
X
H
H
L
L
PDF: 09005aef845656da
m29fxxxf/t_2mb-16mb.pdf - Rev. B 2/14 EN
31
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© 2013 Micron Technology, Inc. All rights reserved.
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