Embedded Flash memory interface RM0390
76/1328 RM0390 Rev 4
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Table 10. Access versus read protection level
Memory area
Protection
Level
Debug features, Boot from RAM or
from System memory bootloader
Booting from Flash memory
Read Write Erase Read Write Erase
Main Flash Memory
Level 1 NO NO
(1)
YES
Level 2 NO YES
Option Bytes
Level 1 YES YES
Level 2 NO NO
OTP
Level 1 NO NA YES NA
Level 2 NO NA YES NA
1. The main Flash memory is only erased when the RDP changes from level 1 to 0. The OTP area remains unchanged.
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