SLAZ577V January   2014  – May 2021 MSP430F6749A

 

  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.      PEU128
      2.      PZ100
    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  AUXPMM2
    6. 6.6  BSL7
    7. 6.7  BSL14
    8. 6.8  COMP10
    9. 6.9  CPU21
    10. 6.10 CPU22
    11. 6.11 CPU36
    12. 6.12 CPU37
    13. 6.13 CPU40
    14. 6.14 CPU46
    15. 6.15 CPU47
    16. 6.16 DMA4
    17. 6.17 DMA7
    18. 6.18 DMA9
    19. 6.19 DMA10
    20. 6.20 EEM17
    21. 6.21 EEM19
    22. 6.22 EEM23
    23. 6.23 JTAG26
    24. 6.24 JTAG27
    25. 6.25 LCDB6
    26. 6.26 PMM11
    27. 6.27 PMM12
    28. 6.28 PMM14
    29. 6.29 PMM15
    30. 6.30 PMM18
    31. 6.31 PMM20
    32. 6.32 PMM26
    33. 6.33 PORT15
    34. 6.34 PORT19
    35. 6.35 PORT26
    36. 6.36 SD3
    37. 6.37 SYS16
    38. 6.38 UCS11
    39. 6.39 USCI36
    40. 6.40 USCI37
    41. 6.41 USCI41
    42. 6.42 USCI42
    43. 6.43 USCI47
    44. 6.44 USCI50
  7. 7Revision History

USCI47

USCI Module

Category

Functional

Function

eUSCI SPI slave with clock phase UCCKPH = 1

Description

The eUSCI SPI operates incorrectly under the following conditions:

1. The eUSCI_A or eUSCI_B module is configured as a SPI slave with clock phase mode UCCKPH = 1

AND

2. The SPI clock pin is not at the appropriate idle level (low for UCCKPL = 0, high for UCCKPL = 1) when the UCSWRST bit in the UCxxCTLW0 register is cleared.

If both of the above conditions are satisfied, then the following will occur:
eUSCI_A: the SPI will not be able to receive a byte (UCAxRXBUF will not be filled and UCRXIFG will not be set) and SPI slave output data will be wrong (first bit will be missed and data will be shifted).
eUSCI_B: the SPI receives data correctly but the SPI slave output data will be wrong (first byte will be duplicated or replaced by second byte).

Workaround

Use clock phase mode UCCKPH = 0 for MSP SPI slave if allowed by the application.

OR

The SPI master must set the clock pin at the appropriate idle level (low for UCCKPL = 0, high for UCCKPL = 1) before SPI slave is reset (UCSWRST bit is cleared).

OR

For eUSCI_A: to detect communication failure condition where UCRXIFG is not set, check both UCRXIFG and UCTXIFG. If UCTXIFG is set twice but UCRXIFG is not set, reset the MSP SPI slave by setting and then clearing the UCSWRST bit, and inform the SPI master to resend the data.