SLAZ188T October   2012  – May 2021 MSP430F2618

 

  1. 1Functional Advisories
  2. 2Preprogrammed Software Advisories
  3. 3Debug Only Advisories
  4. 4Fixed by Compiler Advisories
  5. 5Nomenclature, Package Symbolization, and Revision Identification
    1. 5.1 Device Nomenclature
    2. 5.2 Package Markings
      1.      ZQW113
      2.      PM64
      3.      PN80
      4.      ZCA113
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  ADC25
    2. 6.2  BCL12
    3. 6.3  BCL13
    4. 6.4  BCL15
    5. 6.5  CPU8
    6. 6.6  CPU16
    7. 6.7  CPU19
    8. 6.8  DAC4
    9. 6.9  DMA3
    10. 6.10 DMA4
    11. 6.11 DMA13
    12. 6.12 FLASH19
    13. 6.13 FLASH24
    14. 6.14 FLASH25
    15. 6.15 FLASH27
    16. 6.16 FLASH36
    17. 6.17 JTAG23
    18. 6.18 PORT10
    19. 6.19 PORT12
    20. 6.20 TA12
    21. 6.21 TA16
    22. 6.22 TA21
    23. 6.23 TAB22
    24. 6.24 TB2
    25. 6.25 TB16
    26. 6.26 TB24
    27. 6.27 USCI20
    28. 6.28 USCI21
    29. 6.29 USCI22
    30. 6.30 USCI23
    31. 6.31 USCI24
    32. 6.32 USCI25
    33. 6.33 USCI26
    34. 6.34 USCI27
    35. 6.35 USCI30
    36. 6.36 USCI34
    37. 6.37 USCI35
    38. 6.38 USCI40
    39. 6.39 XOSC5
    40. 6.40 XOSC8
  7. 7Revision History

6.14 FLASH25

FLASH Module

Category

Functional

Function

Marginal Read Mode is not functional

Description

The control bits for marginal read mode contained in the FCTL4 register are automatically cleared by any flash access. This prevents the marginal read mode from being used.

Workaround

It is possible to read out memory contents in marginal read mode if the indexed addressing mode X(Ry) is used to access the flash memory. In this case, the FCTL4 control bits are not cleared, and the marginal read mode works as expected. It is recommended to write the code for reading the flash memory contents in assembler as this allows full control over the used addressing mode. Note that certain assemblers may optimize an indexed addressing source operation of 0(Ry) to an indirect register mode @Ry operation, which will not work. The following is an example of reading the word memory location 0x4000 in marginal read mode, preventing a possible assembler optimization:

mov.w #0x4000,R15   ; Pointer to target address
dec.w R15           ; Decrement pointer
mov.w 1(R15),R12    ; Read memory contents at R15+1, store result in R12