at49bv320ct ATMEL Corporation, at49bv320ct Datasheet - Page 7

• Manufacturer Part Number: at49bv320ct
• Description: 32-megabit 2m X 16 3-volt Only Flash Memory
• Manufacturer: ATMEL Corporation

3372F–FLASH–4/05
Table 4-2.
Figure 4-1.
Note:
V
V
V
V
V
V
V
V
V
PP
CC
CC
CC
CC
CC
CC
CC
IL
/5V
/5V
/5V
/5V
/5V
/5V
/5V
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].
WP
Hardlock and Softlock Protection Configurations in Conjunction with WP
Sector Locking State Diagram
0
0
0
1
1
1
1
x
WP = V
WP = V
Hard-
IL
IH
lock
= 0
= 1
0
0
1
0
0
1
1
x
UNLOCKED
[000]
[110]
[100]
Soft-
lock
0
1
1
0
1
0
1
x
60h/
D0h
60h/
D0h
Allowed?
60h/D0h
Erase/
Prog
Yes
Yes
Yes
No
No
No
No
No
60h/01h
60h/
2Fh
60h/
01h
60h/
01h
Comments
No sector is locked
Sector is Softlocked. The Unlock command
can unlock the sector.
Hardlock protection mode is enabled. The
sector cannot be unlocked.
No sector is locked.
Sector is Softlocked. The Unlock command
can unlock the sector.
Hardlock protection mode is overridden and
the sector is not locked.
Hardlock protection mode is overridden and
the sector can be unlocked via the Unlock
command.
Erase and Program Operations cannot be
performed.
60h/
2Fh
LOCKED
60h/D0h = Unlock Command
60h/01h = Softlock Command
60h/2Fh = Hardlock Command
[001]
[011]
[111]
[101]
60h/
2Fh
Hardlocked is disabled by
Hardlocked
AT49BV320C(T)
Power-Up/Reset
Power-Up/Reset
Default
WP = V
Default
IH
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