SLAZ380AH October   2012  – August 2021 MSP430FR5727

 

  1.   1
  2.   2
  3.   3
  4.   4
  5.   5
    1.     6
    2.     7
      1.      8
      2.      9
    3.     10
  6.   11
    1.     12
    2.     13
    3.     14
    4.     15
    5.     16
    6.     17
    7.     18
    8.     19
    9.     20
    10.     21
    11.     22
    12.     23
    13.     24
    14.     25
    15.     26
    16.     27
    17.     28
    18.     29
    19.     30
    20.     31
    21.     32
    22.     33
    23.     34
    24.     35
    25.     36
    26.     37
    27.     38
    28.     39
    29.     40
    30.     41
    31.     42
    32.     43
    33.     44
    34.     45
    35.     46
    36.     47
  7.   48

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.