7

AT49BV320C(T)

3372D–FLASH–5/04

Figure 1. Sector Locking State Diagram

Notes:

1. The notation [X, Y, Z] denotes the locking state of a sector. The current locking state of a sector is defined by the state of WP

and the two bits of the sector-lock status D[1:0].

Table 2. Hardlock and Softlock Protection Configurations in Conjunction with WP

V

PP

WP

Hard-

lock

Soft-

lock

Erase/

Prog

Allowed?

Comments

V

0

0

0

Yes

No sector is locked

V

0

0

1

No

Sector is Softlocked. The Unlock

command can unlock the sector.

V

0

1

1

No

Hardlock protection mode is enabled. The

sector cannot be unlocked.

V

1

0

0

Yes

No sector is locked.

V

1

0

1

No

Sector is Softlocked. The Unlock

command can unlock the sector.

V

1

1

0

Yes

Hardlock protection mode is overridden

and the sector is not locked.

V

1

1

1

No

Hardlock protection mode is overridden

and the sector can be unlocked via the

Unlock command.

V

IL

x

x

x

No

Erase and Program Operations cannot be

performed.

[000]

[001]

[011]

[111]

[101]

[110]

[100]

60h/

D0h

60h/01h

60h/

2Fh

60h

/2F

h

60h/D0h

60h/

01h

60h/

D0h

60h/

01h

60h/

2Fh

60h/

2Fh

UNLOCKED

LOCKED

WP = V

WP = V

Power-Up/Reset

Default

Power-Up/Reset

Default

Hardlocked is disabled by

WP = V

IH

60h/D0h = Unlock Command

60h/01h = Softlock Command

60h/2Fh = Hardlock Command

Hardlocked