AT52BR6408A ATMEL [ATMEL Corporation], AT52BR6408A Datasheet - Page 5

• Manufacturer Part Number: AT52BR6408A
• Description: 64-Mbit Flash, 8-Mbit SRAM (x16 I/O)
• Manufacturer: ATMEL [ATMEL Corporation]

3425A–STKD–1/04
To disable the Hardlock sector protection mode, the chip must be either reset or power
cycled.
Table 1. Hardlock and Softlock Protection Configurations in Conjunction with WP
SECTOR PROTECTION DETECTION: A software method is available to determine if
the sector protection Softlock or Hardlock features are enabled. When the device is in
the software product identification mode (see Software Product Identification Entry and
Exit sections) a read from the I/O0 and I/O1 at address location 00002H within a sector
will show if the sector is unlocked, softlocked, or hardlocked.
Table 2. Sector Protection Status
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
I/O1
0
0
1
1
WP
0
0
0
1
1
1
1
x
I/O0
0
1
0
1
Hard-
lock
0
0
1
0
0
1
1
x
Sector Protection Status
Sector Not Locked
Softlock Enabled
Hardlock Enabled
Both Hardlock and Softlock Enabled
Soft-
lock
0
1
1
0
1
0
1
x
Allowed?
Erase/
Prog
Yes
Yes
Yes
No
No
No
No
No
AT52BR6408A(T)
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.
5