SLAZ290AC October   2012  – May 2021 MSP430F5438A , MSP430F5438A-EP

 

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6.38 FLASH35

FLASH Module

Category

Functional

Function

Flash read error may cause invalid memory access

Description

Flash memory accesses are always 32-bit wide and performed on 32-bit boundaries. A read error when accessing flash may corrupt the most significant bit (MSB) in a 32-bit access when programmed as a logic 0.
When affected flash is idle, the read disturb may occur on the first flash access that follows any of the listed events:

- On reset issued at RST input pin

- On wakeup from low-power modes when accessing interrupt vector addresses located at addresses <0x8000

- When moving program execution from unaffected to affected areas of flash

- When accessing affected flash after execution from RAM

Workaround

See Flash Read Error and Susceptibility for MSP430F54xxA (SLAA470) for detailed
background information and possible workaround(s).