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

6.1 MSS#50

Occasional EDMA self-test failures

Revisions Affected

AWR6843AOP ES2.0

Details

During the first powerup, there could be occasional failures in the EDMA self-test. It is reported as part of the "AWR_AE_MSS_BOOTERRORSTATUS_SB" flag during bootup. This is due to the undefined states of certain flops during first powerup. This blocks the EDMA channel and eventually fails any subsequent EDMA transfers as well.

EDMA is also used to transfer out ADC/CP/CQ data on the CSI or LVDS interface as well, so this data transfer would also fail in that case.

Note: This failure is not seen with subsequent nReset cycles after powerup.

Workaround

The host application needs to monitor the BOOTERRORSTATUS flag. If the EDMA_Self Test flag is set to ‘1’, indicating failure, it should issue an nReset to the mmWave device. This should be done without power cycling the device, i.e. disabling the power supplies to the mmWave device.