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AT52BR6408AT Datasheet(PDF) 5 Page - ATMEL Corporation

Part # AT52BR6408AT
Description  64-Mbit Flash, 8-Mbit SRAM (x16 I/O)
Download  37 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT52BR6408AT Datasheet(HTML) 5 Page - ATMEL Corporation

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AT52BR6408A(T)
3425A–STKD–1/04
To disable the Hardlock sector protection mode, the chip must be either reset or power
cycled.
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 1. Hardlock and Softlock Protection Configurations in Conjunction with WP
V
PP
WP
Hard-
lock
Soft-
lock
Erase/
Prog
Allowed?
Comments
V
CC/5V
0
0
0
Yes
No sector is locked
V
CC/5V
0
0
1
No
Sector is Softlocked. The
Unlock command can unlock
the sector.
V
CC/5V
0
1
1
No
Hardlock protection mode is
enabled. The sector cannot
be unlocked.
V
CC/5V
1
0
0
Yes
No sector is locked.
VCC/5V
1
0
1
No
Sector is Softlocked. The
Unlock command can unlock
the sector.
V
CC/5V
1
1
0
Yes
Hardlock protection mode is
overridden and the sector is
not locked.
VCC/5V
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.
Table 2. Sector Protection Status
I/O1
I/O0
Sector Protection Status
0
0
Sector Not Locked
0
1
Softlock Enabled
1
0
Hardlock Enabled
1
1
Both Hardlock and Softlock Enabled


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