SWRZ099B April   2020  – March 2022 AWR6843AOP

 

  1. 1Introduction
  2. 2Device Nomenclature
  3. 3Device Markings
  4. 4Usage Notes
    1. 4.1 MSS: SPI Speed in 3-Wire Mode Usage Note
  5. 5Advisory to Silicon Variant / Revision Map
  6. 6Known Design Exceptions to Functional Specifications
    1.     MSS#25
    2.     MSS#26
    3.     MSS#27
    4.     MSS#28
    5.     MSS#29
    6.     MSS#30
    7.     MSS#31
    8.     MSS#32
    9.     MSS#33
    10.     MSS#34
    11.     MSS#36
    12.     MSS#37B
    13.     MSS#38A
    14.     MSS#39
    15.     MSS#40
    16.     MSS#41
    17.     MSS#42A
    18.     MSS#43A
    19.     MSS#44A
    20.     MSS#45
    21. 6.1 MSS#50
    22. 6.2 MSS#51
    23.     ANA#11B
    24.     ANA#12A
    25.     ANA#13B
    26.     ANA#14
    27.     ANA#16
    28.     ANA#17A
    29.     ANA#18B
    30.     ANA#19
    31.     ANA#20
    32.     ANA#22A
    33.     ANA#27A
    34.     ANA#30
    35.     ANA#31
    36.     PACKAGE#02
  7. 7Trademarks
  8. 8Revision History

MSS#27

MibSPI in Slave Mode in 3- or 4-Pin Communication Transmits Data Incorrectly for Slow SPICLK Frequencies and for Clock Phase = 1

Revision(s) Affected:

AWR6843AOP ES2.0

Description:

The MibSPI module, when configured in multibuffered slave mode with 3-functional pins (CLK, SIMO, SOMI) or 4-functional pins (CLK, SIMO, SOMI, nENA), could transmit incorrect data when all the following conditions are met:

  • MibSPI module is configured in multibuffered mode,
  • Module is configured to be a slave in the SPI communication,
  • SPI communication is configured to be in 3-pin mode or 4-pin mode with nENA,
  • Clock phase for SPICLK is 1, and
  • SPICLK frequency is MSS_VCLK frequency / 12 or slower

Workaround(s):

The issue can be avoided by setting the CSHOLD bit in the control field of the TX RAM (Multi-Buffer RAM Transmit Data Register). The nCS is not used as a functional signal in this communication; hence, setting the CSHOLD bit does not cause any other effect on the SPI communication.