SLAZ247Z October   2012  – May 2021 MSP430F5132

 

  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.      DA38
      2.      RSB40
      3.      YFF40
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  ADC39
    2. 6.2  ADC42
    3. 6.3  ADC69
    4. 6.4  BSL7
    5. 6.5  COMP10
    6. 6.6  CPU21
    7. 6.7  CPU22
    8. 6.8  CPU40
    9. 6.9  CPU46
    10. 6.10 CPU47
    11. 6.11 DMA4
    12. 6.12 DMA7
    13. 6.13 DMA10
    14. 6.14 EEM11
    15. 6.15 EEM17
    16. 6.16 EEM19
    17. 6.17 EEM21
    18. 6.18 EEM23
    19. 6.19 JTAG26
    20. 6.20 JTAG27
    21. 6.21 PMAP1
    22. 6.22 PMM14
    23. 6.23 PMM15
    24. 6.24 PMM18
    25. 6.25 PMM20
    26. 6.26 PMM26
    27. 6.27 PORT15
    28. 6.28 PORT19
    29. 6.29 PORT21
    30. 6.30 SYS12
    31. 6.31 SYS16
    32. 6.32 TD1
    33. 6.33 TD2
    34. 6.34 UCS9
    35. 6.35 UCS11
    36. 6.36 USCI26
    37. 6.37 USCI31
    38. 6.38 USCI34
    39. 6.39 USCI35
    40. 6.40 USCI39
    41. 6.41 USCI40
  7. 7Revision History

6.35 UCS11

UCS Module

Category

Functional

Function

Modifying UCSCTL4 clock control register triggers an additional erroneous clock request

Description

Changing the SELM/SELS/SELA bits in the UCSCTL4 register will correctly configure the respective clock to use the intended clock source but might also erroneously set XT1/XT2 fault flag if the crystals are not present at XT1/XT2 or not configured in the application firmware. If the NMI interrupt for the OFIFG is enabled, an unintentional NMI interrupt will be triggered and needs to be handled.

Note: The XT1/XT2 fault flag can be set regardless of which SELM/SELS/SELA bit combinations are being changed.

Workaround

Clear all the fault flags in UCSCTL7 register once after changing any of the SELM/SELS/SELA bits in the UCSCTL4 register.
If OFIFG-NMI is enabled during clock switching, disable OFIFG-NMI interrupt  during changing the SELM/SELS/SELA bits in the UCSCTL4 register to prevent unintended NMI.
Alternatively it can be handled accordingly (clear falsely set fault flags) in the Interrupt Service Routine to ensure proper OFIFG clearing.