SLAZ160J October   2012  – May 2021 MSP430F2121

 

  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.      DGV20
      2.      PW20
      3.      DW20
      4.      RGE24
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BCL6
    2. 6.2  BCL8
    3. 6.3  BCL9
    4. 6.4  BCL10
    5. 6.5  BCL11
    6. 6.6  BCL12
    7. 6.7  BCL13
    8. 6.8  BCL14
    9. 6.9  BSL5
    10. 6.10 CPU4
    11. 6.11 CPU5
    12. 6.12 CPU6
    13. 6.13 CPU11
    14. 6.14 CPU12
    15. 6.15 CPU13
    16. 6.16 CPU14
    17. 6.17 CPU19
    18. 6.18 CPU45
    19. 6.19 EEM20
    20. 6.20 FLASH16
    21. 6.21 FLASH17
    22. 6.22 FLASH18
    23. 6.23 FLASH19
    24. 6.24 FLASH20
    25. 6.25 FLASH22
    26. 6.26 FLASH24
    27. 6.27 FLASH27
    28. 6.28 FLASH36
    29. 6.29 JTAG15
    30. 6.30 PORT8
    31. 6.31 PORT10
    32. 6.32 SYS15
    33. 6.33 TA12
    34. 6.34 TA16
    35. 6.35 TA21
    36. 6.36 TAB22
    37. 6.37 XOSC5
    38. 6.38 XOSC8
  7. 7Revision History

6.17 CPU19

CPU Module

Category

Compiler-Fixed

Function

CPUOFF modification may result in unintentional register read

Description

If an instruction that modifies the CPUOFF bit in the Status Register is followed by an instruction with an indirect addressed operand (e.g. MOV @R8, R9, RET, POP, POPM), an unintentional register read operation can occur during the wakeup of the CPU. If the unintentional read occurs to a read sensitive register (e.g. UCB0RXBUF, TAIV), which changes its value or the value of other registers (IFG's), the bug leads to lost interrupts or wrong register read values.

Workaround

Insert a NOP instruction after each CPUOFF instruction.

OR

Refer to the table below for compiler-specific fix implementation information.
Note that compilers implementing the fix may lead to double stack usage when RET/RETA follows the compiler-inserted NOP.

IDE/Compiler Version Number Notes
IAR Embedded Workbench IAR EW430 v6.20.1 until v6.40 User is required to add the compiler or assembler flag option below. --hw_workaround=nop_after_lpm
IAR Embedded Workbench IAR EW430 v6.40 or later Workaround is automatically enabled
TI MSP430 Compiler Tools (Code Composer Studio) 15.12.0.LTS User is required to add the compiler or assembler flag option below. --silicon_errata=CPU19
MSP430 GNU Compiler (MSP430-GCC) MSP430-GCC 4.9 build 389 or later User is required to add the compiler or assembler flag option below. -msilicon-errata=cpu19 -msilicon-errata-warn=cpu19 generates a warning in addition
MSP430 GNU Compiler (MSP430-GCC) MSP430-GCC 5.x build 14 or later User is required to add the compiler or assembler flag option below. -msilicon-errata=cpu19 -msilicon-errata-warn=cpu19 generates a warning in addition