SLAZ290AC October   2012  – May 2021 MSP430F5438A , MSP430F5438A-EP

 

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6.17 CPU35

CPU Module

Category

Compiler-Fixed

Function

Instruction BIT.B @Rx,PC uses the wrong PC value

Description

The BIT(.B/.W) instruction in indirect register addressing mode uses the wrong PC value. This instruction is represented by 2 bytes of opcode. If the Program Counter (PC) is used as the destination register, the 2 opcode bytes of the current BIT instruction are not accounted for. The resulting operation executes the instruction using the wrong PC value and this affects the results in the Status Register (SR).

Workaround

None. Note that compilers will not generate a BIT instruction that uses the PC as an operand.

Refer to the table below for compiler-specific information.

IDE/Compiler Version Number Notes
IAR Embedded Workbench Not affected
TI MSP430 Compiler Tools (Code Composer Studio) Not affected
MSP430 GNU Compiler (MSP430-GCC) Not affected