LH28F800BJB-PTTL10 View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LH28F800BJB-PTTL10' PDF : 47 Pages View PDF
LHF80J22
17
Table 5. Write Protection Alternatives(1)
Operation
VCCW
RP#
Permanent
Lock-Bit
Block
Lock-bit
WP#
Effect
Block Erase ≤VCCWLK X
X
or
>VCCWLK VIL
X
Word/Byte
VIH
X
Write
Full Chip ≤VCCWLK X
X
Erase
>VCCWLK VIL
X
VIH
X
X
X All Blocks Locked.
X
X All Blocks Locked.
0
VIL 2 Boot Blocks Locked.
VIH Block Erase and Word/Byte Write Enabled.
1
VIL Block Erase and Word/Byte Write Disabled.
VIH Block Erase and Word/Byte Write Disabled.
X
X All Blocks Locked.
X
X All Blocks Locked.
X
VIL All Unlocked Blocks are Erased.
2 Boot Blocks and Locked Blocks are NOT Erased.
VIH All Unlocked Blocks are Erased,
Locked Blocks are NOT Erased.
Set Block ≤VCCWLK X
X
Lock-Bit >VCCWLK VIL
X
VIH
0
1
X
X Set Block Lock-Bit Disabled.
X
X Set Block Lock-Bit Disabled.
X
X Set Block Lock-Bit Enabled.
X
X Set Block Lock-Bit Disabled.
Clear Block ≤VCCWLK X
X
Lock-Bits >VCCWLK VIL
X
VIH
0
1
X
X Clear Block Lock-Bits Disabled.
X
X Clear Block Lock-Bits Disabled.
X
X Clear Block Lock-Bits Enabled.
X
X Clear Block Lock-Bits Disabled.
Set
≤VCCWLK X
X
X
X Set Permanent Lock-Bit Disabled.
Permanent >VCCWLK VIL
X
X
X Set Permanent Lock-Bit Disabled.
Lock-Bit
VIH
X
X
X Set Permanent Lock-Bit Enabled.
NOTE:
1. X can be VIL or VIH for RP# and WP#, and "0" or "1" for permanent lock-bit and block lock-bit. See DC Characteristics
for VCCWLK voltage.
Rev. 1.27
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