SLAZ627W September   2014  – August 2021 MSP430FR6972

 

  1. 1Functional Advisories
  2. 2Preprogrammed Software Advisories
  3. 3Debug Only Advisories
  4. 4Fixed by Compiler Advisories
  5. 5Nomenclature, Package Symbolization, and Revision Identification
    1. 5.1 Device Nomenclature
    2. 5.2 Package Markings
      1.      PM64
      2.      RGC64
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  ADC38
    2. 6.2  ADC42
    3. 6.3  ADC43
    4. 6.4  ADC64
    5. 6.5  ADC66
    6. 6.6  ADC67
    7. 6.7  ADC69
    8. 6.8  ADC70
    9. 6.9  ADC71
    10. 6.10 AES1
    11. 6.11 COMP7
    12. 6.12 COMP10
    13. 6.13 CPU21
    14. 6.14 CPU22
    15. 6.15 CPU40
    16. 6.16 CPU46
    17. 6.17 CPU47
    18. 6.18 CS7
    19. 6.19 CS12
    20. 6.20 DMA7
    21. 6.21 EEM19
    22. 6.22 EEM23
    23. 6.23 EEM27
    24. 6.24 EEM30
    25. 6.25 EEM31
    26. 6.26 GC4
    27. 6.27 GC5
    28. 6.28 JTAG27
    29. 6.29 PMM24
    30. 6.30 PMM27
    31. 6.31 PMM31
    32. 6.32 PMM32
    33. 6.33 PORT28
    34. 6.34 REF9
    35. 6.35 RTC10
    36. 6.36 RTC12
    37. 6.37 TB25
    38. 6.38 USCI41
    39. 6.39 USCI42
    40. 6.40 USCI45
    41. 6.41 USCI47
    42. 6.42 USCI50
  7. 7Revision History

6.16 CPU46

CPU Module

Category

Functional

Function

POPM peforms unexpected memory access and can cause VMAIFG to be set

Description

When the POPM assembly instruction is executed, the last Stack Pointer increment is followed by an unintended read access to the memory. If this read access is performed on vacant memory, the VMAIFG will be set and can trigger the corresponding interrupt (SFRIE1.VMAIE) if it is enabled. This issue occurs if the POPM assembly instruction is performed up to the top of the STACK.

Workaround

If the user is utilizing C, they will not be impacted by this issue. All TI/IAR/GCC pre-built libraries are not impacted by this bug. To ensure that POPM is never executed up to the memory border of the STACK when using assembly it is recommended to either

1. Initialize the SP to
a. TOP of STACK - 4 bytes if POPM.A is used
b. TOP of STACK - 2 bytes if POPM.W is used

OR

2. Use the POPM instruction for all but the last restore operation. For the the last restore operation use the POP assembly instruction instead.

For instance, instead of using:


POPM.W #5,R13



Use:


POPM.W #4,R12
POP.W R13



Refer to the table below for compiler-specific fix implementation information.

IDE/Compiler Version Number Notes
IAR Embedded Workbench Not affected C code is not impacted by this bug. User using POPM instruction in assembler is required to implement the above workaround manually.
TI MSP430 Compiler Tools (Code Composer Studio) Not affected C code is not impacted by this bug. User using POPM instruction in assembler is required to implement the above workaround manually.
MSP430 GNU Compiler (MSP430-GCC) Not affected C code is not impacted by this bug. User using POPM instruction in assembler is required to implement the above workaround manually.