lh28f400su-nc Sharp Microelectronics of the Americas, lh28f400su-nc Datasheet - Page 14

• Manufacturer Part Number: lh28f400su-nc
• Description: 512k 256k Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

LH28F400SU-NC
14
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.
FLOW TO REWRITE DATA
WRITE NEW DATA
RELOCK BLOCK
ERASE BLOCK
OPERATION
COMPLETE
RESET WP
TO BLOCK
(NOTE 5)
(NOTE 1)
(NOTE 4)
(NOTE 2)
(NOTE 3)
SET WP
START
Figure 10. Updating Data in a Locked Block
FLOW TO ADD DATA
4M (512K × 8, 256K × 16) Flash Memory
DATA TO BLOCK
WRITE MORE
OPERATION
COMPLETE
RESET WP
(NOTE 1)
(NOTE 4)
(NOTE 3)
SET WP
START
28F400SUT-NC60-8