SLAZ242O October   2012  – May 2021 MSP430F4784

 

  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
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  COMP3
    2. 6.2  CPU19
    3. 6.3  CPU44
    4. 6.4  EEM20
    5. 6.5  FLASH19
    6. 6.6  FLASH24
    7. 6.7  FLASH25
    8. 6.8  FLASH27
    9. 6.9  FLASH36
    10. 6.10 FLL4
    11. 6.11 FLL5
    12. 6.12 FLL6
    13. 6.13 FLL7
    14. 6.14 JTAG23
    15. 6.15 LCDA5
    16. 6.16 LCDA7
    17. 6.17 SDA4
    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 USCI15
    26. 6.26 USCI19
    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 USCI28
    35. 6.35 USCI30
    36. 6.36 USCI34
    37. 6.37 USCI35
    38. 6.38 USCI40
    39. 6.39 XOSC5
    40. 6.40 XOSC8
    41. 6.41 XOSC9
  7. 7Revision History

6.22 TB2

TB Module

Category

Functional

Function

Interrupt is lost (slow ACLK)

Description

Timer_B counter is running with slow clock (external TBCLK or ACLK) compared to MCLK. The compare mode is selected for the capture/compare channel and the CCRx register is incremented by 1 with the occurring compare interrupt (if TBR = CCRx).
Due to the fast MCLK, the CCRx register increment (CCRx = CCRx + 1) happens before the Timer_B counter has incremented again. Therefore, the next compare interrupt should happen at once with the next Timer_B counter increment (if TBR = CCRx + 1). This interrupt is lost.

Workaround

Switch capture/compare mode to capture mode before the CCRx register increment. Switch back to compare mode afterward.