SLAZ290AC October   2012  – May 2021 MSP430F5438A , MSP430F5438A-EP

 

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6.19 CPU39

CPU Module

Category

Compiler-Fixed

Function

PC is corrupted when single-stepping through an instruction that clears the GIE bit

Description

Single-stepping over an instruction that clears the General Interrupt Enable bit (for example DINT or BIC #GIE,SR) when the GIE bit was previously set may corrupt the PC.  For example, the DINT or BIC #GIE,SR is a 2-byte instruction. Single stepping through this instruction increments the PC by a value of 4 instead of 2 thus corrupting the next PC value.

Note: This erratum applies to debug mode only.

Workaround

Insert a NOP or __no_operation() intrinsic immediately after the line of code that clears the GIE bit.

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 v5.60 until v6.20 User is required to add the compiler flag option below. --hw_workaround=CPU39 For the command line version add the following information Compiler: --core=430 Assembler:-v1
IAR Embedded Workbench IAR EW430 v6.20 or later Workaround is automatically enabled
TI MSP430 Compiler Tools (Code Composer Studio) v4.1.3 or later
MSP430 GNU Compiler (MSP430-GCC) MSP430-GCC 4.9 build 167 or later