SLAZ176T October   2012  – May 2021 MSP430F2416

 

  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  FLASH19
    9. 6.9  FLASH24
    10. 6.10 FLASH25
    11. 6.11 FLASH27
    12. 6.12 FLASH36
    13. 6.13 JTAG23
    14. 6.14 PORT10
    15. 6.15 PORT12
    16. 6.16 TA12
    17. 6.17 TA16
    18. 6.18 TA21
    19. 6.19 TAB22
    20. 6.20 TB2
    21. 6.21 TB16
    22. 6.22 TB24
    23. 6.23 USCI20
    24. 6.24 USCI21
    25. 6.25 USCI22
    26. 6.26 USCI23
    27. 6.27 USCI24
    28. 6.28 USCI25
    29. 6.29 USCI26
    30. 6.30 USCI27
    31. 6.31 USCI30
    32. 6.32 USCI34
    33. 6.33 USCI35
    34. 6.34 USCI40
    35. 6.35 XOSC5
    36. 6.36 XOSC8
  7. 7Revision History

6.10 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