24.4.10 Register Write Protection

To prevent any single software error from corrupting SYSC behavior, certain registers in the address space can be write-protected by setting the WPEN bit in the ”System Controller Write Protection Mode Register” (SYSC_WPMR).

The following registers can be write-protected:

• The RSTC Mode register⁽¹⁾
• The RTT Mode register⁽²⁾
• The RTT Alarm register⁽²⁾
• The RTC Control register⁽³⁾
• The RTC Mode register⁽³⁾
• The RTC Time Alarm register⁽³⁾
• The RTC Calendar Alarm register⁽³⁾
• The General Purpose Backup registers⁽⁴⁾
• The Supply Controller Control Register
• The Supply Controller Supply Monitor Mode Register
• The Supply Controller Mode Register
• The Supply Controller Wakeup Mode Register