SLAZ686L February   2017  – August 2021 MSP430FR5962

 

  1.   1
  2.   2
  3.   3
  4.   4
  5.   5
    1.     6
    2.     7
      1.      8
      2.      9
      3.      10
      4.      11
    3.     12
  6.   13
    1.     14
    2.     15
    3.     16
    4.     17
    5.     18
    6.     19
    7.     20
    8.     21
    9.     22
    10.     23
    11.     24
    12.     25
    13.     26
    14.     27
    15.     28
    16.     29
    17.     30
    18.     31
    19.     32
    20.     33
  7.   34

6.11 CPU47

CPU Module

Category

Functional

Function

An unexpected Vacant Memory Access Flag (VMAIFG) can be triggered

Description

An unexpected Vacant Memory Access Flag (VMAIFG) can be triggered, if a PC-modifying instruction (e.g. - ret, push, call, pop, jmp, br) is fetched from the last addresses (last 4 or 8 byte) of a memory (e.g.- FLASH, RAM, FRAM) that is not contiguous to a higher, valid section on the memory map.
In debug mode using breakpoints the last 8 bytes are affected.
In free running mode the last 4 bytes are affected.

Workaround

Edit the linker command file to make the last 4 or 8 bytes of affected memory sections unavailable, to avoid PC-modifying instructions on these locations.
Remaining instructions or data can still be stored on these locations.