The device features memory protection that can restrict user access and enable write protection:
- Securing the whole memory map to prevent unauthorized access from JTAG port or BSL, by writing JTAG and BSL signatures using the JTAG port, SBW, the BSL, or in-system by the CPU.
- Write protection enabled to prevent unwanted write operation to FRAM contents by setting the control bits in System Configuration register 0. For more detailed information, see the SYS chapter in the MSP430FR4xx and MSP430FR2xx Family User's Guide.
The FRAM is protected by default on PUC. To write to FRAM during code execution, the application must first clear the corresponding PFWP or DFWP bit in System Configuration Register 0 to unprotect the FRAM.