SLAZ417I October   2012  – May 2021 MSP430G2231 , MSP430G2231-EP , MSP430G2231-Q1

 

  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.      PW14
      2.      N14
      3.      RSA16
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BCL12
    2. 6.2  BCL14
    3. 6.3  CPU4
    4. 6.4  EEM20
    5. 6.5  FLASH16
    6. 6.6  SYS15
    7. 6.7  TA12
    8. 6.8  TA16
    9. 6.9  TA21
    10. 6.10 TAB22
    11. 6.11 USI4
    12. 6.12 USI5
    13. 6.13 XOSC5
    14. 6.14 XOSC8
  7. 7Revision History

6.12 USI5

USI Module

Category

Functional

Function

SPI master generates one additional clock after module reset Bug

Description

Initalizing the USI in SPI MASTER mode with the USICKPH bit set generates one additional clock pulse than defined by the value in the USICNTx bits on the SCLK pin during the first data transfer after module reset. For example, if the USICNTx bits hold the value eight, nine clock pulses are generated on the SCLK pin for the first transfer only.

Workaround

Load USICNTx with a count of N-1 bits (where N is the required number of bits) for the first transfer only.