SLAZ283AA October   2012  – May 2021 MSP430F5435

 

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6.15 CPU24

CPU Module

Category

Compiler-Fixed

Function

Program counter corruption following entry into low power mode

Description

The program counter is corrupted when an interrupt event occurs in the time between (and including) one cycle before and one cycle after the CPUOFF bit is set in the status register. This failure occurs when the BIS instruction is followed by a CALL or CALLA instruction using the following addressing modes:

BIS   &, SR
CALLA indir, indir autoinc, reg

BIS   INDEX, SR
CALLA indir, indir autoinc, reg

BIS   reg, SR
CALLA reg, indir, indir autoinc



NOTE: Due to the instruction emulation, the EINT instruction, as well as the __enable_interrupts() and possibly the __bis_SR_register() intrinsic functions are affected.

Workaround

Insert a NOP instruction or __no_operation() intrinsic function call between the BIS and CALL or CALLA instructions.

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

IDE/Compiler Version Number Notes
IAR Embedded Workbench IAR EW430 v6.20 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) v4.1.3 or later
MSP430 GNU Compiler (MSP430-GCC) MSP430-GCC 4.9 build 167