SLAZ498H January   2013  – March 2021 MSP430G2544

 

  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  BCL16
    3. 6.3  CPU19
    4. 6.4  CPU45
    5. 6.5  EEM20
    6. 6.6  FLASH24
    7. 6.7  FLASH27
    8. 6.8  FLASH36
    9. 6.9  PORT10
    10. 6.10 SYS15
    11. 6.11 TA12
    12. 6.12 TA16
    13. 6.13 TA21
    14. 6.14 TAB22
    15. 6.15 TB2
    16. 6.16 TB16
    17. 6.17 TB24
    18. 6.18 USCI20
    19. 6.19 USCI21
    20. 6.20 USCI22
    21. 6.21 USCI23
    22. 6.22 USCI24
    23. 6.23 USCI25
    24. 6.24 USCI26
    25. 6.25 USCI27
    26. 6.26 USCI30
    27. 6.27 USCI34
    28. 6.28 USCI35
    29. 6.29 USCI40
    30. 6.30 XOSC5
  7. 7Revision History

6.20 USCI22

USCI Module

Category

Functional

Function

I2C Master Receiver with 10-bit slave addressing

Description

Unexpected behavior of the USCI_B can occur when configured in I2C master receive mode with 10-bit slave addressing under the following conditions:

1) The USCI sends first byte of slave address, the slave sends an ACK and when second address byte is sent, the slave sends a NACK.
2) Master sends a repeat start condition (If UCTXSTT=1).
3) The first address byte following the repeated start is acknowledged.

However, the second address byte is not sent, instead the Master incorrectly starts to receive data and sets UCBxRXIFG=1.

Workaround

Do not use repeated start condition instead set the stop condition UCTXSTP=1 in the NACK ISR prior to the following start condition (USTXSTT=1).