SDAA228 September   2026 MSPM33C321A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
    1. 1.1 Terminology
  5. 2 NONMAIN Architecture
    1. 2.1 MSPM33 Family Overview
    2. 2.2 NONMAIN Configuration Overview
    3. 2.3 NONMAIN Memory
  6. 3 NONMAIN Configuration
    1. 3.1 BCR Configuration
      1. 3.1.1 BCR Configuration ID
      2. 3.1.2 Serial Wire Debug (SWD) Policy
        1. 3.1.2.1 Access Policy
        2. 3.1.2.2 Debug Policy
          1. 3.1.2.2.1 SHA2-256 Password Example
        3. 3.1.2.3 Mass Erase and Factory Reset Policy
      3. 3.1.3 Flash Security Configuration
        1. 3.1.3.1 MAIN Flash Security Configuration
        2. 3.1.3.2 DATA Flash Security Configuration
        3. 3.1.3.3 NONMAIN Flash Static Write Protection
      4. 3.1.4 SYSPLL Configuration During Boot
      5. 3.1.5 Customer Secure Code (CSC)
        1. 3.1.5.1 CSC Policy
        2. 3.1.5.2 Flash Bank Swap Policy
        3. 3.1.5.3 Debug Hold
      6. 3.1.6 Fast Boot Mode
      7. 3.1.7 Application Digest Check
        1. 3.1.7.1 CRC32 Digest Check Example
        2. 3.1.7.2 SHA2-256 Digest Check Example
      8. 3.1.8 BSL Policy
      9. 3.1.9 BCR Checksum
        1. 3.1.9.1 CRC Check Fail Handling
    2. 3.2 BSL Configuration
      1. 3.2.1 BSL Configuration ID
      2. 3.2.2 Invoke Pin Configuration
      3. 3.2.3 ROM-Based Communication Interface
        1. 3.2.3.1 UART Interface
        2. 3.2.3.2 I2C Interface
        3. 3.2.3.3 CAN Interface
      4. 3.2.4 BSL Security Configuration
        1. 3.2.4.1 Access Password
        2. 3.2.4.2 Read-Out Feature
        3. 3.2.4.3 Alert Feature
        4. 3.2.4.4 Application Integrity Check
      5. 3.2.5 BSL Checksum
        1. 3.2.5.1 CRC Check Fail Handling
  7. 4 NONMAIN Configuration With SysConfig
    1. 4.1 SysConfig Introduction
    2. 4.2 BCR Configuration With SysConfig
      1. 4.2.1 Password Configuration
      2. 4.2.2 SYSPLL Configuration
      3. 4.2.3 Flash Security Configuration
      4. 4.2.4 Application Digest Check
      5. 4.2.5 Other BCR Configurations
    3. 4.3 BSL Configuration With SysConfig
      1. 4.3.1 BSL Access Password
      2. 4.3.2 BSL Invoke Pin Configuration
      3. 4.3.3 BSL Communication Interface
      4. 4.3.4 Other BCR Configurations
  8. 5 NONMAIN Configuration in Application Code
  9. 6 NONMAIN Operation With IDE Tool
    1. 6.1 NONMAIN Configuration Files
    2. 6.2 Project Erase Property
    3. 6.3 Password-Protected Debug
  10. 7 NONMAIN Operation With Programmer Tool
    1. 7.1 NONMAIN Operation With UniFlash
    2. 7.2 NONMAIN Operation With J-Flash
  11. 8 Frequently Asked Questions (FAQs)
    1. 8.1 MCU Locked State Analysis
      1. 8.1.1 Hardware Issue Analysis
        1. 8.1.1.1 Hardware Circuit Design
        2. 8.1.1.2 Debugger Connection
        3. 8.1.1.3 External Reset Signal
      2. 8.1.2 Software Issue Analysis
        1. 8.1.2.1 CPU Enters a Fault State
        2. 8.1.2.2 BCR Configuration
        3. 8.1.2.3 Low Power Mode (STOP or STANDBY)
        4. 8.1.2.4 SHUTDOWN IO State
        5. 8.1.2.5 SWD IO Function
        6. 8.1.2.6 WDT or IWDT Reset
        7. 8.1.2.7 Software POR or BOOTRST
    2. 8.2 Unlock the MSPM33 Device
      1. 8.2.1 Force MCU to Enter BSL Mode
      2. 8.2.2 Send BSL Command
      3. 8.2.3 Generate DSSM Command
    3. 8.3 Debug Error Overview
      1. 8.3.1 No Error Code: DAP Connection Error
      2. 8.3.2 No Error Code: Connection to the MSPM33 Core Failed
      3. 8.3.3 Error – 6305: PRSC Module Failed to Write a Routine Register
      4. 8.3.4 Error – 260: An Attempt to Connect to the XDS110 Failed
      5. 8.3.5 Error – 261: Invalid Response From the XDS110
      6. 8.3.6 Error – 615: Target Fails to Identify a Correctly Formatted SWD Header
      7. 8.3.7 Error – 1001: Requested Operation is Not Supported on This Device
      8. 8.3.8 Error – 2131: Unable to Access Device Register
    4. 8.4 MSPM33 Boot Diagnostic
  12. 9 Summary
  13. 10References

1.1 Terminology

    Bootcode (BCR)Start-up routine that runs after BOOTRST, configuring the device to execute an application.
    NONMAIN flash NONMAIN flash is a dedicated region of flash memory which stores the configuration data used by the boot configuration routine (BCR) configuration and bootstrap loader (BSL) configuration to boot the device.
    FACTORY flash FACTORY region is a memory-mapped flash region which provides read-only data describing the capabilities of a device, as well as any factory-provided trim information for use by application software.
    BCR configurationConfiguration structure that contains all user-configurable parameters for Bootcode, which resides in NONMAIN flash memory.
    Bootstrap loader (BSL)Boot routine used to load data to the device memory.
    BSL configurationConfiguration structure that contains all user configurable parameters for Bootstrap loader, which resides in NONMAIN flash memory.
    Customer Secure Code (CSC)The code runs after TI boot code and executes from flash memory to further configure security elements. For more details, see the Secure Booting User’s Guide