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The tables below detail the various protection and locking states of the device.
Table 9-4.
Software Protection Register States
WP
X
(Don't Care)
Sector Protection Register
n (1)
0
1
Sector
n (1)
Unprotected
Protected
Note:
1. “n” represents a sector number
Table 9-5.
Hardware and Software Locking
WP
SPRL
Locking
SPRL Change Allowed
Sector Protection Registers
Unlocked and modifiable using the
0
0
Can be modified from 0 to 1
Protect and Unprotect Sector
commands. Global Protect and
Unprotect can also be performed.
Locked in current state. Protect and
0
1
Hardware
Locked
Locked
Unprotect Sector commands will be
ignored. Global Protect and
Unprotect cannot be performed.
Unlocked and modifiable using the
1
0
Can be modified from 0 to 1
Protect and Unprotect Sector
commands. Global Protect and
Unprotect can also be performed.
Locked in current state. Protect and
1
1
Software
Locked
Can be modified from 1 to 0
Unprotect Sector commands will be
ignored. Global Protect and
Unprotect cannot be performed.
18
AT26DF161
3599H–DFLASH–8/09
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