AT49BV6416C Datasheet, PDF (5/32 Pages) ATMEL Corporation – 64-megabit (4M x 16) Page Mode 2.7-volt Flash Memory

3465C–FLASH–07/05
AT49BV6416C(T)
Table 3-1.
V_PP
V_CC
V_CC
V_CC
V_CC
V_CC
V_CC
V_CC
V_IL
Hardlock and Softlock Protection Configurations in Conjunction with WP
Hard-
Soft-
WP
lock
lock
Erase/
Prog
Allowed?
Comments
0
0
0
Yes
No sector is locked
0
0
1
Sector is Softlocked. The
No
Unlock command can unlock
the sector.
0
1
1
Hardlock protection mode is
No
enabled. The sector cannot be
unlocked.
1
0
0
Yes
No sector is locked.
1
0
1
Sector is Softlocked. The
No
Unlock command can unlock
the sector.
1
1
0
Hardlock protection mode is
Yes
overridden and the sector is
not locked.
1
1
1
Hardlock protection mode is
No
overridden and the sector can
be unlocked via the Unlock
command.
x
x
x
No
Erase and Program Operations
cannot be performed.
Figure 3-1. Sector Locking State Diagram
UNLOCKED
LOCKED
A
[000]
C
WP = V_IL = 0
B
[001]
C
Power-Up/Reset
Default
[011]
Hardlocked
A
[110]
WP = V_IH = 1
A
[100]
B
C
B
[111]
Hardlocked is disabled by
WP = V_IH
C
Power-Up/Reset
Default
[101]
A = Unlock Command
B = Softlock Command
C = Hardlock Command
Note: 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].
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