LH28F400SU-LC Datasheet, PDF (14/37 Pages) Sharp Electrionic Components – 4M (512K × 8, 256K × 16) Flash Memory

LH28F400SU-LC
4M (512K × 8, 256K × 16) Flash Memory
START
START
RESET WP
(NOTE 1)
RESET WP
(NOTE 1)
ERASE BLOCK
(NOTE 2)
SET WP
(NOTE 3)
WRITE NEW DATA
TO BLOCK
(NOTE 4)
RELOCK BLOCK
(NOTE 5)
WRITE MORE
DATA TO BLOCK
(NOTE 4)
SET WP
(NOTE 3)
OPERATION
COMPLETE
FLOW TO ADD DATA
OPERATION
COMPLETE
FLOW TO REWRITE DATA
NOTES:
1. Use Reset-Write-Protect flowchart. Enable Write/Erase operation to all blocks.
2. Use Block-Erase flowchart. Erasing a block clears any previously established lockout for that block.
3. Use Set-Write-Protect flowchart. This step re-implements protection to locked blocks.
4. Use Word/Byte-Write or 2-Byte-Write flowchart sequences to write data.
5. Use Block-Lock flowchart to write lock bit if desired.
Figure 10. Updating Data in a Locked Block
28F400SUH-LC15-8
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