at49bv6416 ATMEL Corporation, at49bv6416 Datasheet - Page 5

• Manufacturer Part Number: at49bv6416
• Description: 64-megabit 4m X 16 Page Mode 2.7-volt Flash Memory
• Manufacturer: ATMEL Corporation

Table 3-1.
Figure 3-1.
Note:
3.7.3
3451D–FLASH–04/06
V
V
V
V
V
V
V
V
V
PP
CC
CC
CC
CC
CC
CC
CC
IL
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
Sector Protection Detection
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
Hard-
lock
0
0
1
0
0
1
1
x
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 a read from the I/O0
and I/O1 at address location 00002H within a sector will show if the sector is unlocked, soft-
locked, or hardlocked.
WP = V
Soft-
lock
WP = V
0
1
1
0
1
0
1
x
IL
IH
= 0
= 1
Allowed?
NLOCKED
Erase/
[000]
[110]
[100]
Prog
Yes
Yes
Yes
No
No
No
No
No
A
A
A
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.
C
B
B
B
LOCKED
C
[001]
[011]
[111]
[101]
A
B
C
C
= Softlock Command
= Unlock Command
= Hardlock Command
Hardlocked is disabled by
Hardlocked
Power- p/Reset
Power- p/Reset
Default
WP = V
Default
IH
AT49BV6416(T)
5