参数资料
型号: AT49BV6416T-70TI
厂商: ATMEL CORP
元件分类: DRAM
英文描述: 64-megabit (4M x 16) Page Mode 2.7-volt Flash Memory
中文描述: 4M X 16 FLASH 2.7V PROM, 70 ns, PDSO48
封装: 12 X 20 MM, PLASTIC, MO-142DD, TSOP1-48
文件页数: 5/30页
文件大小: 293K
代理商: AT49BV6416T-70TI
5
3451C–FLASH–2/05
AT49BV6416(T)
Figure 3-1.
Sector Locking State Diagram
Note:
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].
3.7.3
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 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.
Table 3-1.
Hardlock and Softlock Protection Configurations in Conjunction with WP
V
PP
WP
Hard-
lock
Soft-
lock
Erase/
Prog
Allowed
Comments
V
CC
0
0
0
Yes
No sector is locked
V
CC
0
0
1
No
Sector is Softlocked. The Unlock command can unlock the sector.
V
CC
0
1
1
No
Hardlock protection mode is enabled. The sector cannot be
unlocked.
V
CC
1
0
0
Yes
No sector is locked.
V
CC
1
0
1
No
Sector is Softlocked. The Unlock command can unlock the sector.
V
CC
1
1
0
Yes
Hardlock protection mode is overridden and the sector is not locked.
V
CC
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.
[000]
[001]
[011]
[111]
[101]
[110]
[100]
UNLOCKED
LOCKED
WP = V
IL
= 0
WP = V
IH
= 1
Power-Up/Reset
Default
Power-Up/Reset
Default
Hardlocked is disabled by
WP = V
IH
= Unlock Command
= SoftlockCommand
= Hardlock Command
Hardlocked
A
B
C
C
A
B
A
B
C
C
A
B
C
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