SLAZ250Z October   2012  – May 2021 MSP430F5171

 

  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.      DA38
      2.      RSB40
      3.      YFF40
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BSL7
    2. 6.2  COMP10
    3. 6.3  CPU21
    4. 6.4  CPU22
    5. 6.5  CPU40
    6. 6.6  CPU46
    7. 6.7  CPU47
    8. 6.8  DMA4
    9. 6.9  DMA7
    10. 6.10 DMA10
    11. 6.11 EEM11
    12. 6.12 EEM17
    13. 6.13 EEM19
    14. 6.14 EEM21
    15. 6.15 EEM23
    16. 6.16 JTAG26
    17. 6.17 JTAG27
    18. 6.18 PMAP1
    19. 6.19 PMM14
    20. 6.20 PMM15
    21. 6.21 PMM18
    22. 6.22 PMM20
    23. 6.23 PMM26
    24. 6.24 PORT15
    25. 6.25 PORT19
    26. 6.26 PORT21
    27. 6.27 SYS12
    28. 6.28 SYS16
    29. 6.29 TD1
    30. 6.30 TD2
    31. 6.31 UCS9
    32. 6.32 UCS11
    33. 6.33 USCI26
    34. 6.34 USCI31
    35. 6.35 USCI34
    36. 6.36 USCI35
    37. 6.37 USCI39
    38. 6.38 USCI40
  7. 7Revision History

6.6 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.