SLAZ246Z October   2012  – May 2021 MSP430F5131

 

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

6.37 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