CHAPTER 19 FLASH MEMORY
Preliminary User’s Manual U19014EJ1V0UD
466
Table 19-8. Relationship Between Enabling Security Function and Command
(1) During
on-board/off-board
programming
Executed Command
Valid Security
Batch Erase (Chip Erase)
Block Erase
Write
Prohibition of batch erase (chip erase)
Cannot be erased in batch
Can be performed
Note
.
Prohibition of block erase
Can be performed.
Prohibition of writing
Can be erased in batch.
Blocks cannot be
erased.
Cannot be performed.
Prohibition of rewriting boot cluster 0
Cannot be erased in batch
Boot cluster 0 cannot be
erased.
Boot cluster 0 cannot be
written.
Note
Confirm that no data has been written to the write area. Because data cannot be erased after batch erase
(chip erase) is prohibited, do not write data if the data has not been erased.
(2) During self programming
Executed Command
Valid Security
Block Erase
Write
Prohibition of batch erase (chip erase)
Prohibition of block erase
Prohibition of writing
Blocks can be erased.
Can be performed.
Prohibition of rewriting boot cluster 0
Boot cluster 0 cannot be erased.
Boot cluster 0 cannot be written.
Table 19-9 shows how to perform security settings in each programming mode.
Table 19-9. Setting Security in Each Programming Mode
(1) On-board/off-board
programming
Security Security
Setting
How
to Disable Security Setting
Prohibition of batch erase (chip erase)
Cannot be disabled after set.
Prohibition of block erase
Prohibition of writing
Execute batch erase (chip erase)
command
Prohibition of rewriting boot cluster 0
Set via GUI of dedicated flash
programmer, etc.
Cannot be disabled after set.
(2) Self
programming
Security Security
Setting
How
to Disable Security Setting
Prohibition of batch erase (chip erase)
Cannot be disabled after set.
Prohibition of block erase
Prohibition of writing
Execute batch erase (chip erase)
command during on-board/off-board
programming (cannot be disabled during
self programming)
Prohibition of rewriting boot cluster 0
Set by using information library.
Cannot be disabled after set.
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