SEC=00, MEEN=00, FSLACC=00, KEYEN=00
Flash Security Register
SEC | Flash Security 0 (00): MCU security status is secure 1 (01): MCU security status is secure 2 (10): MCU security status is unsecure (The standard shipping condition of the FTFE is unsecure.) 3 (11): MCU security status is secure |
FSLACC | Factory Security Level Access Code 0 (00): Factory access granted 1 (01): Factory access denied 2 (10): Factory access denied 3 (11): Factory access granted |
MEEN | Mass Erase Enable Bits 0 (00): Mass erase is enabled 1 (01): Mass erase is enabled 2 (10): Mass erase is disabled 3 (11): Mass erase is enabled |
KEYEN | Backdoor Key Security Enable 0 (00): Backdoor key access disabled 1 (01): Backdoor key access disabled (preferred KEYEN state to disable backdoor key access) 2 (10): Backdoor key access enabled 3 (11): Backdoor key access disabled |