SLAZ105Z October   2012  – May 2021 CC430F6147

 

  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.      RGC64
    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  AES1
    5. 6.5  BSL7
    6. 6.6  BSL14
    7. 6.7  COMP10
    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 DMA10
    17. 6.17 EEM17
    18. 6.18 EEM19
    19. 6.19 EEM23
    20. 6.20 JTAG26
    21. 6.21 JTAG27
    22. 6.22 LCDB5
    23. 6.23 LCDB6
    24. 6.24 PMM11
    25. 6.25 PMM12
    26. 6.26 PMM14
    27. 6.27 PMM15
    28. 6.28 PMM18
    29. 6.29 PMM20
    30. 6.30 PMM26
    31. 6.31 PORT15
    32. 6.32 PORT19
    33. 6.33 PORT29
    34. 6.34 RF1A1
    35. 6.35 RF1A2
    36. 6.36 RF1A3
    37. 6.37 RF1A5
    38. 6.38 RF1A6
    39. 6.39 RF1A8
    40. 6.40 SYS12
    41. 6.41 SYS16
    42. 6.42 UCS11
    43. 6.43 USCI26
    44. 6.44 USCI30
    45. 6.45 USCI34
    46. 6.46 USCI35
    47. 6.47 USCI39
    48. 6.48 USCI40
  7. 7Revision History

6.47 USCI39

USCI Module

Category

Functional

Function

USCI I2C IFGs UCSTTIFG, UCSTPIFG, UCNACKIFG

Description

Unpredictable code execution can occur if one of the hardware-clear-able IFGs UCSTTIFG, UCSTPIFG or UCNACKIFG is set while the global interrupt enable is set by software (GIE=1). This erratum is triggered if ALL of the following events occur in following order:

1. Pending Interrupt: One of the UCxIFG=1 AND UCxIE=1 while GIE=0

2. The GIE is set by software (e.g. EINT)

3. The pending interrupt is cleared by hardware (external I2C event) in a time window of 1 MCLK clock cycle after the "EINT" instruction is executed.

Workaround

Disable the UCSTTIE, UCSTPIE and UCNACKIE before the GIE is set. After GIE is set, the local interrupt enable flags can be set again.

Assembly example:

   bic #UCNACKIE+UCSTPIE+UCSTTIE, UCBxIE ; disable all self-clearing interrupts
   NOP
   EINT
   bis #UCNACKIE+UCSTPIE+UCSTTIE, UCBxIE ; enable all self-clearing interrupts