参数资料
型号: W28J800BT90L
厂商: WINBOND ELECTRONICS CORP
元件分类: PROM
英文描述: 512K X 16 FLASH 2.7V PROM, 90 ns, PDSO48
封装: 12 X 20 MM, TSOP-48
文件页数: 14/49页
文件大小: 1527K
代理商: W28J800BT90L
W28J800B/T
Publication Release Date: April 11, 2003
- 21 -
Revision A4
Table 5. Write Protection Alternatives(1)
OPERATION
VPP
#RESET
PERMANENT
LOCK-BIT
BLOCK
LOCK-BIT
#WP
EFFECT
≤ VPPLK
X
All Blocks Locked.
VIL
X
All Blocks Locked.
VIL
2 Boot Blocks Locked.
0
VIH
Block Erase and Word/Byte Write Enabled.
VIL
Block Erase and Word/Byte Write Disabled.
Block Erase
or Word/Byte
Write
> VPPLK
VIH
X
1
VIH
Block Erase and Word/Byte Write Disabled.
≤ VPPLK
X
All Blocks Locked.
VIL
X
All Blocks Locked.
VIL
All Unlocked Blocks are Erased.
2 Boot Blocks and Locked Blocks are NOT
Erased.
Full Chip
Erase
> VPPLK
VIH
X
VIH
All Unlocked Blocks are Erased.
Locked Blocks are NOT Erased.
≤ VPPLK
X
Set Block Lock-Bit Disabled.
VIL
X
Set Block Lock-Bit Disabled.
0
X
Set Block Lock-Bit Disabled.
Set Block
Lock-Bit
> VPPLK
VIH
1
X
Set Block Lock-Bit Disabled.
≤ VPPLK
X
Clear Block Lock-Bits Disabled.
VIL
X
Clear Block Lock-Bits Disabled.
0
X
Clear Block Lock-Bits Enabled.
Clear Block
Lock-Bits
> VPPLK
VIH
1
X
Clear Block Lock-Bits Disabled.
≤ VPPLK
X
Set Permanent Lock-Bit Disabled.
VIL
X
Set Permanent Lock-Bit Disabled.
Set Permanent
Lock-Bit
> VPPLK
VIH
X
Set Permanent Lock-Bit Enabled.
Note: X can be VIL or VIH for #RESET and #WP, and "0" or "1" for permanent lock-bit and block lock-bit.
See DC Characteristics for VPPLK voltage.
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