at25df321 ATMEL Corporation, at25df321 Datasheet - Page 19

• Manufacturer Part Number: at25df321
• Description: At25df321 32-megabit 2.7-volt Only Serial Firmware Dataflash Memory
• Manufacturer: ATMEL Corporation

3669A–DFLASH–07/07
The tables below detail the various protection and locking states of the device.
Table 9-4.
Note:
Table 9-5.
WP
0
0
1
1
(Don't Care)
WP
1. “n” represents a sector number
X
SPRL
0
1
0
1
Software Protection Register States
Hardware and Software Locking
Hardware
Locking
Software
Locked
Locked
Sector Protection Register
SPRL Change Allowed
Can be modified from 0 to 1
Locked
Can be modified from 0 to 1
Can be modified from 1 to 0
n
0
1
(1)
Sector Protection Registers
Unlocked and modifiable using the
Protect and Unprotect Sector
commands. Global Protect and
Unprotect can also be performed.
Locked in current state. Protect and
Unprotect Sector commands will be
ignored. Global Protect and
Unprotect cannot be performed.
Unlocked and modifiable using the
Protect and Unprotect Sector
commands. Global Protect and
Unprotect can also be performed.
Locked in current state. Protect and
Unprotect Sector commands will be
ignored. Global Protect and
Unprotect cannot be performed.
Unprotected
Protected
Sector
AT25DF321
n
(1)
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