SLAU846B June 2023 – November 2024 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G1519 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3519
The BCR configuration data and BSL configuration data structures in the NONMAIN memory each include a CRC32 value corresponding to the CRC32 digest of the respective structure. During the device boot process, the BCR will compute the CRC digest of the data structures and compare it with the stored CRC values before the data contained within the structures is trusted for use.
In the event that the BCR configuration data (which contains the SWD policies, BSL enable/disable policy, and flash memory protection and integrity check policies) fails its CRC check during boot, a catastrophic boot error results and the following limitations are imposed:
The benefit of the this CRC check is that any bit flips in configuration data, such as the static write protection configuration (which is a pillar of secure boot), may be detected with high confidence during the boot process. The fail handling procedure explicitly prevents the BSL and user application from running, and the only supported options (SWD factory reset and TI FA) are protected by 16-bit pattern-match fields.
If the BSL configuration data (which contains the BSL password and BSL policies) fails the CRC check during BSL invocation, a catastrophic boot error results and the following limitations are imposed:
The benefit of this CRC check s that any bit flips in the BSL configuration data may be detected with high confidence during the invoke process. The failure handling procedure prevents the BSL from starting with invalid data which could lead to a loss of security.
In addition to the user-specified configuration data, if the TI factory trim fails its CRC check during boot, a catastrophic boot error will also result with the following limitations: