KEYEN=00, SEC=00
Flash Security Register
| SEC | Flash Security 0 (00): MCU security status is secure 1 (01): MCU security status is secure,it is the preferred SEC state to set MCU to secured state 2 (10): MCU security status is unsecure 3 (11): MCU security status is secure |
| RNV | Reserved Nonvolatile Bits |
| 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 |