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16 Mbit LPC Flash
SST49LF160C
Advance Information
TABLE 14: Block Locking Register Bits
Reserved Bit
Read-Lock Bit
Lock-Down Bit
Write-Lock Bit
[7:3]
00000
00000
00000
00000
00000
00000
00000
00000
[2]
0
0
0
0
1
1
1
1
[1]
0
0
1
1
0
0
1
1
[0]
0
1
0
1
0
1
0
1
Lock Status
Full Access
Write Locked (Default State at Power-Up)
Locked Open (Full Access Locked Down)
Write Locked Down
Block Read Locked (Registers alterable)
Block Read & Write Lock (Registers alterable)
Block Read Locked Down (Registers not alterable)
Block Read & Write lock Down (Registers not alterable)
T14.0 1315
Write-Lock Bit
The Write-Lock bit, bit 0, controls the lock state described
in Table 14. The default Write status of all blocks after
power up is write locked. When bit 0 of the Block Locking
register is set, Program and Erase operations for the corre-
sponding block are prevented. Clearing the Write-Lock bit
will unprotect the block. The Write-Lock bit must be cleared
prior to starting a Program or Erase operation since it is
sampled at the beginning of the operation. The Write-Lock
bit functions in conjunction with the hardware Write Lock
pin TBL# for the top Boot Block. When TBL# is low, it over-
rides the software locking scheme. The top Boot Block
Locking register does not indicate the state of the TBL#
pin. The Write-Lock bit functions in conjunction with the
hardware WP#/AAI pin for the remaining blocks (Blocks 0
to 33 for SST49LF160C). When WP#/AAI is low, it over-
rides the software locking scheme. The Block Locking reg-
ister does not indicate the state of the WP#/AAI pin.
Lock-Down Bit
The Lock-Down bit, bit 1, controls the Block Locking regis-
ter as described in Table 14. When in LPC interface mode,
the default Lock Down status of all blocks upon power-up is
not locked down. Once the Lock-Down bit is set, any future
attempted changes to that Block Locking register will be
ignored. The Lock-Down bit is only cleared upon a device
reset with RST# or INIT# or power down. Current Lock
Down status of a particular block can be determined by
reading the corresponding Lock-Down bit. Once a block’s
Lock-Down bit is set, the Read-Lock and Write-Lock bits for
that block can no longer be modified: the block is locked
down in its current state of read/write accessibility.
Read-Lock Bit
The default read status of all blocks upon power-up is read-
unlocked. When a block’s read lock bit is set, data cannot
be read from that block. An attempted read from a read-
locked block will result in the data 00h. The read lock status
can be unlocked by clearing the read lock bit: this can only
be done provided that the block is not locked down. The
current read lock status of a particular block can be deter-
mined by reading the corresponding read-lock bit.
?2006 Silicon Storage Technology, Inc.
21
S71315-00-000
4/06
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相关代理商/技术参数
SST49LF160C-33-4C-NHE_ 制造商:Microchip Technology Inc 功能描述:
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SST4H-D0 功能描述:电缆束带 14.8" BLK CABLE TIE RELEAS WEATHER RES RoHS:否 制造商:Phoenix Contact 产品:Cable Tie Mounts 类型:Adhesive 颜色:Black 材料:Acrylonitrile Butadiene Styrene (ABS) 长度:19 mm 宽度:19 mm 抗拉强度:
SST4H-D30 功能描述:电缆束带 Cable Tie, 2-Piece, 14.8"L (376mm), Ligh RoHS:否 制造商:Phoenix Contact 产品:Cable Tie Mounts 类型:Adhesive 颜色:Black 材料:Acrylonitrile Butadiene Styrene (ABS) 长度:19 mm 宽度:19 mm 抗拉强度:
SST4HH-D 制造商:Panduit Corp 功能描述:
SST4HH-D30 功能描述:电缆束带 Cable Tie, Heavy Head, 2-Piece, 14.8" (3 RoHS:否 制造商:Phoenix Contact 产品:Cable Tie Mounts 类型:Adhesive 颜色:Black 材料:Acrylonitrile Butadiene Styrene (ABS) 长度:19 mm 宽度:19 mm 抗拉强度:
SST4H-L 功能描述:电缆束带 Cable Tie 2-Piece 14.8"L (376mm) Lt RoHS:否 制造商:Phoenix Contact 产品:Cable Tie Mounts 类型:Adhesive 颜色:Black 材料:Acrylonitrile Butadiene Styrene (ABS) 长度:19 mm 宽度:19 mm 抗拉强度:
SST4H-L 制造商:Panduit Corp 功能描述:Cable Ties Cable Bundle Diameter Max.:4.