SWRZ162 May   2024 IWR2944

 

  1.   1
  2. 1Introduction
  3. 2Device Nomenclature
  4. 3Device Markings
  5. 4Advisory to Silicon Variant / Revision Map
  6. 5Known Design Exceptions to Functional Specifications
    1.     MSS#25
    2.     MSS#27
    3.     MSS#28
    4.     MSS#29
    5.     MSS#30
    6.     MSS#33
    7.     MSS#40
    8. 5.1  MSS#46
    9. 5.2  MSS#48
    10. 5.3  MSS#49
    11. 5.4  MSS#52
    12. 5.5  MSS#53
    13. 5.6  MSS#54
    14. 5.7  MSS#55
    15. 5.8  MSS#56
    16. 5.9  MSS#57
    17. 5.10 MSS#58
    18. 5.11 MSS#59
    19. 5.12 MSS#60
    20. 5.13 MSS#61
    21. 5.14 MSS#62
    22. 5.15 ANA#12A
    23.     ANA#32A
    24.     ANA#33A
    25.     ANA#34A
    26.     ANA#35A
    27.     ANA#36
    28.     ANA#37A
    29.     ANA#38A
    30.     ANA#39
    31.     ANA#43
    32.     ANA#44
    33.     ANA#45
    34.     ANA#46
    35.     ANA#47
  7.   Trademarks
  8. 6Revision History

MSS#57

Loss of data observed on Flush/Marker or completion of packet over MDO interface.

Revision(s) Affected:

IWR2944 ES1.0, ES2.0

Description:

421-24008 IWR2944: Data frames sent over MDO discards the last 6 bytes at the end of the frame

It is observed that data transfer over the MDO having data_size = 6 get dropped. To ensure complete data gets transferred, the data size needs to adhere to 4byte and 8byte aligned data. If not done, a loss of the last 6 bytes of data on Flush/Marker trigger or completion of packet could be observed.

Data Flow: EDMA -> SNIFFER -> FIFO --> AGGREGATOR -> STM -> TPIU -> AURORA TX.

With Data transfer using MSS_TPCC to MDO_DSS_FIFO having data size of 6 bytes results in the 6 bytes getting dropped. STM module has cxstm500_axislvif_write block which samples data based on WSTRB. There is no case inside the STM which can handle 6 bytes of incoming data.

Design Limitation in STM module to handle 6 bytes of data.

1, 2, 4, 8 bytes of data get handled. But 6 bytes results in data getting dropped.

Workaround(s):

It is recommended to include 2 dummy bytes during transfer to make the WSTRB handle 8 bytes.