SLAA721E October   2016  – March 2020 MSP430FR5969 , MSP430FR5969-SP , MSP430FR5994 , MSP430FR6989

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Glossary
    2. 1.2 Conventions
  3. 2Implementation
    1. 2.1 Main
    2. 2.2 Application Manager
      1. 2.2.1 Bootloader and Application Detection
        1. 2.2.1.1 Forcing Bootloader Mode
        2. 2.2.1.2 Application Validation
        3. 2.2.1.3 Jumping to Application
      2. 2.2.2 Memory Assignment
      3. 2.2.3 Interrupt Vectors in FRAM Devices
    3. 2.3 Memory Interface (MI)
      1. 2.3.1 Dual Image Support
    4. 2.4 Communication Interface (CI)
      1. 2.4.1 Physical-DataLink (PHY-DL)
        1. 2.4.1.1 UART
        2. 2.4.1.2 SPI
        3. 2.4.1.3 CC110x
        4. 2.4.1.4 Comm Sharing
      2. 2.4.2 NWK-APP
        1. 2.4.2.1 BSL-Based Protocol
          1. 2.4.2.1.1 Security
          2. 2.4.2.1.2 BSL-Based Protocol Using CC110x
          3. 2.4.2.1.3 Examples Using UART or CC110x
  4. 3Customization of MSP430FRBoot
    1. 3.1 Predefined Customizations
  5. 4Building MSPBoot
    1. 4.1 LaunchPad™ Development Kit Hardware
    2. 4.2 CC110x Hardware
    3. 4.3 Software
      1. 4.3.1 Building the Target Software
      2. 4.3.2 Convert Application Output Images
      3. 4.3.3 Generating Linker Files
  6. 5Demo Using FRAM LaunchPad Development Kit as Host
    1. 5.1 Hardware
    2. 5.2 Building the Host Project
    3. 5.3 Running the Demo
  7. 6Porting the target side example projects to other MSP430FR devices
  8. 7References
  9. 8Revision History

2.2.3 Interrupt Vectors in FRAM Devices

FRAM does not have the limitation of a minimum erase size, so all interrupts can be reprogrammed in FRAM devices without risking erasure of the reset vector. By default, MSP430FRBoot enables protection of the bootloader area using MPU, but this feature is disabled while reprogramming interrupt vectors.

Some MSP430 MCUs support redirecting vectors to RAM in hardware (SYSRIVECT), which could be a good alternative especially for devices with sufficient RAM. This also allows for full protection of the bootloader using the MPU module.