SLAZ662S March   2015  – May 2021 MSP430FR2632

 

  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.      YQW24
      2.      RGE24
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  ADC50
    2. 6.2  ADC63
    3. 6.3  BSL18
    4. 6.4  CPU21
    5. 6.5  CPU22
    6. 6.6  CPU40
    7. 6.7  CPU46
    8. 6.8  CS13
    9. 6.9  EEM23
    10. 6.10 GC4
    11. 6.11 GC5
    12. 6.12 PMM32
    13. 6.13 PORT28
    14. 6.14 RTC15
    15. 6.15 USCI42
    16. 6.16 USCI45
    17. 6.17 USCI47
    18. 6.18 USCI50
  7. 7Revision History

6.6 CPU40

CPU Module

Category

Compiler-Fixed

Function

PC is corrupted when executing jump/conditional jump instruction that is followed by instruction with PC as destination register or a data section

Description

If the value at the memory location immediately following a jump/conditional jump instruction is 0X40h or 0X50h (where X = don't care), which could either be an instruction opcode (for instructions like RRCM, RRAM, RLAM, RRUM) with PC as destination register or a data section (const data in flash memory or data variable in
RAM), then the PC value is auto-incremented by 2 after the jump instruction is executed; therefore, branching to a wrong address location in code and leading to wrong program execution.

For example, a conditional jump instruction followed by data section (0140h).

@0x8012   Loop     DEC.W  R6
@0x8014            DEC.W  R7
@0x8016            JNZ    Loop
@0x8018   Value1   DW     0140h

Workaround

In assembly, insert a NOP between the jump/conditional jump instruction and program code with instruction that contains PC as destination register or the data section.

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

IDE/Compiler Version Number Notes
IAR Embedded Workbench IAR EW430 v5.51 or later For the command line version add the following information Compiler: --hw_workaround=CPU40 Assembler:-v1
TI MSP430 Compiler Tools (Code Composer Studio) v4.0.x or later User is required to add the compiler or assembler flag option below. --silicon_errata=CPU40
MSP430 GNU Compiler (MSP430-GCC) Not affected