AT25DF161 datasheet(28/60 Pages) ATMEL

28 / 60 page

3687C–DFLASH–7/09

AT25DF161 [Preliminary]

Note:

1. “n” represents a sector number

Table 9-4.

Sector Protection Register States

Sector Protection Register

n(1)

Sector

n(1)

(Don't Care)

0Unprotected

1Protected

Table 9-5.

Hardware and Software Locking

SPRL

Locking

SPRL Change Allowed

Sector Protection Registers

Can be modified from 0 to 1

Unlocked and modifiable using the

Protect and Unprotect Sector commands.

Global Protect and Unprotect can also be

performed.

Hardware

Locked

Locked in current state. Protect and

Unprotect Sector commands will be

ignored. Global Protect and Unprotect

cannot be performed.

Can be modified from 0 to 1

Unlocked and modifiable using the

Protect and Unprotect Sector commands.

Global Protect and Unprotect can also be

performed.

Software

Locked

Can be modified from 1 to 0

Locked in current state. Protect and

Unprotect Sector commands will be

ignored. Global Protect and Unprotect

cannot be performed.

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