SLAZ345AF October   2012  – May 2021 MSP430F6731

 

  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.      PZ100
      2.      PN80
    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  AUXPMM1
    5. 6.5  AUXPMM2
    6. 6.6  BSL7
    7. 6.7  BSL14
    8. 6.8  CPU21
    9. 6.9  CPU22
    10. 6.10 CPU36
    11. 6.11 CPU40
    12. 6.12 CPU46
    13. 6.13 CPU47
    14. 6.14 DMA4
    15. 6.15 DMA7
    16. 6.16 DMA9
    17. 6.17 DMA10
    18. 6.18 EEM8
    19. 6.19 EEM17
    20. 6.20 EEM19
    21. 6.21 EEM23
    22. 6.22 JTAG26
    23. 6.23 JTAG27
    24. 6.24 LCDB5
    25. 6.25 LCDB6
    26. 6.26 PMM7
    27. 6.27 PMM11
    28. 6.28 PMM12
    29. 6.29 PMM14
    30. 6.30 PMM15
    31. 6.31 PMM18
    32. 6.32 PMM20
    33. 6.33 PMM26
    34. 6.34 PORT15
    35. 6.35 PORT19
    36. 6.36 SD3
    37. 6.37 UCS11
    38. 6.38 USCI36
    39. 6.39 USCI37
    40. 6.40 USCI41
    41. 6.41 USCI42
    42. 6.42 USCI47
    43. 6.43 USCI50
  7. 7Revision History

PMM11

PMM Module

Category

Functional

Function

MCLK comes up fast on exit from LPM3 and LPM4

Description

The DCO exceeds the programmed frequency of operation on exit from LPM3 and LPM4 for up to 6 us. This behavior is masked from affecting code execution by default: SVSL and SVML run in normal-performance mode and mask CPU execution for 150 us on wakeup from LPM3 and LPM4. However ,when the low-side SVS and the SVM are disabled or are operating in full-performance mode (SVMLE= 0 and SVSLE= 0, or SVMLFP= 1 and SVSLFP= 1) AND MCLK is sourced from the internal DCO running over 4 MHz, 7 MHz,11 MHz,or 14 MHz at core voltage levels 0, 1, 2, and 3, respectively, the mask lasts only 2 us. MCLK is, therefore, susceptible to run out of spec for 4 us.

Workaround

Set the MCLK divide bits in the Unified Clock System Control 5 Register (UCSCTL5) to divide MCLK by two prior to entering LPM3 or LPM4 (set DIVMx= 001). This prevents MCLK from running out of spec when the CPU wakes from the low-power mode. Following the wakeup fromthe low-power mode, wait 32, 48, 80, or 100 cycles for core voltage levels 0, 1, 2, and 3, respectively, before resetting DIVM xto zero and running MCLK at full speed [for example, __delay_cycles(100)]