AT52BC6402A-70CI ATMEL Corporation, AT52BC6402A-70CI Datasheet - Page 5

• Manufacturer Part Number: AT52BC6402A-70CI
• Description: 64 MBIT FLASH 16 MBIT PSRAM
• Manufacturer: ATMEL Corporation

3441B–STKD–11/04
Table 1. Hardlock and Softlock Protection Configurations in Conjunction with WP
Figure 1. Sector Locking State Diagram
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
WP = V
0
0
0
1
1
1
1
x
WP = V
IL
IH
= 0
= 1
Hard-
lock
0
0
1
0
0
1
1
x
UNLOCKED
[000]
[110]
[100]
Soft-
lock
0
1
1
0
1
0
1
x
A
A
A
Allowed?
Erase/
Prog
Yes
Yes
Yes
No
No
No
No
No
C
B
B
B
LOCKED
C
[001]
[011]
[111]
[101]
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.
A
B
C
C
= Softlock Command
= Hardlock Command
= Unlock Command
Hardlocked is disabled by
Hardlocked
Power-Up/Reset
Power-Up/Reset
Default
Default
WP = V
IH
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