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C8051F380/1/2/3/4/5/6/7/C
Accessing FLASH from the C2 debug interface :
1. Any unlocked page may be read, written, or erased.
2. Locked pages cannot be read, written, or erased.
3. The page containing the Lock Byte may be read, written, or erased if it is unlocked.
4. Reading the contents of the Lock Byte is always permitted.
5. Locking additional pages (changing 1s to 0s in the Lock Byte) is not permitted.
6. Unlocking FLASH pages (changing 0s to 1s in the Lock Byte) requires the C2 Device Erase command,
which erases all FLASH pages including the page containing the Lock Byte and the Lock Byte itself.
7. The Reserved Area cannot be read, written, or erased.
Accessing FLASH from user firmware executing on an unlocked page :
1. Any unlocked page except the page containing the Lock Byte may be read, written, or erased.
2. Locked pages cannot be read, written, or erased.
3. The page containing the Lock Byte cannot be erased. It may be read or written only if it is unlocked.
4. Reading the contents of the Lock Byte is always permitted.
5. Locking additional pages (changing 1s to 0s in the Lock Byte) is not permitted.
6. Unlocking FLASH pages (changing 0s to 1s in the Lock Byte) is not permitted.
7. The Reserved Area cannot be read, written, or erased. Any attempt to access the reserved area, or any
other locked page, will result in a FLASH Error device reset.
Accessing FLASH from user firmware executing on a locked page :
1. Any unlocked page except the page containing the Lock Byte may be read, written, or erased.
2. Any locked page except the page containing the Lock Byte may be read, written, or erased.
3. The page containing the Lock Byte cannot be erased. It may only be read or written.
4. Reading the contents of the Lock Byte is always permitted.
5. Locking additional pages (changing 1s to 0s in the Lock Byte) is not permitted.
6. Unlocking FLASH pages (changing 0s to 1s in the Lock Byte) is not permitted.
7. The Reserved Area cannot be read, written, or erased. Any attempt to access the reserved area, or any
other locked page, will result in a FLASH Error device reset.
138
Rev. 1.4
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