SLAZ169O October   2012  – May 2021 MSP430F2274 , MSP430F2274-EP

 

  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.      RHA40
      3.      YFF49
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BCL12
    2. 6.2  BCL13
    3. 6.3  BCL16
    4. 6.4  CPU14
    5. 6.5  CPU19
    6. 6.6  CPU45
    7. 6.7  EEM20
    8. 6.8  FLASH21
    9. 6.9  FLASH22
    10. 6.10 FLASH24
    11. 6.11 FLASH26
    12. 6.12 FLASH27
    13. 6.13 FLASH36
    14. 6.14 JTAG13
    15. 6.15 JTAG14
    16. 6.16 PORT10
    17. 6.17 SYS15
    18. 6.18 TA12
    19. 6.19 TA16
    20. 6.20 TA21
    21. 6.21 TAB22
    22. 6.22 TB2
    23. 6.23 TB16
    24. 6.24 TB24
    25. 6.25 USCI16
    26. 6.26 USCI20
    27. 6.27 USCI21
    28. 6.28 USCI22
    29. 6.29 USCI23
    30. 6.30 USCI24
    31. 6.31 USCI25
    32. 6.32 USCI26
    33. 6.33 USCI27
    34. 6.34 USCI30
    35. 6.35 USCI34
    36. 6.36 USCI35
    37. 6.37 USCI40
    38. 6.38 XOSC5
    39. 6.39 XOSC8
  7. 7Revision History

6.3 BCL16

BCL Module

Category

Functional

Function

SMCLK clock source selection from XT1/VLO to DCO

Description

When the MCLK and the SMCLK do not use the DCO, the DCO is off. The DCO does not start if the clock source for SMCLK is changed from XT1/VLO to DCO. As a result, the SMCLK remains high. Note: This is only true for SMCLK. The DCO starts if the clock source of MCLK is set to DCO.

Workaround

Set clock source of MCLK to DCO by either:

1)setting the selection bits SELMx of BCSCTL2 register to '00' or '01'.

OR

2)setting the OFIFG bit of IFG1 register. Note: This triggers the oscillator fault logic that automatically starts the DCO. Reset the OFIFG bit to further use the XT1/VLO.


For both options, if the XT1/VLO is still required to source MCLK, revert the clock source of MCLK back to XT1/VLO afterwards.