SWRZ097D April   2020  – November 2022 AWR6843

 

  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. 6.3 ANA#12A
    25.     ANA#13B
    26.     ANA#14
    27.     ANA#15
    28.     ANA#16
    29.     ANA#17A
    30.     ANA#18B
    31.     ANA#19
    32.     ANA#20
    33.     ANA#21
    34.     ANA#22A
    35.     ANA#27A
  7. 7Trademarks
    1.     Revision History

MSS#26

DMA Requests Lost During Suspend Mode

Revision(s) Affected:

AWR6843 ES2.0

Description:

While the device is halted in suspend mode by the debugger, the DMA is expected to complete the remaining transfers of a block, if the DEBUG MODE bit field of the GCTRL register is configured to '01'. Instead, the DMA does not complete the remaining transfers of a block but, rather stops after two more frames of data are transferred. Subsequent DMA requests from a peripheral to trigger the remaining frames of a block can be lost.

This issue occurs only in the following conditions:

  • The device is suspended by a debugger
  • A peripheral continues to generate requests while the device is suspended
  • The DMA is setup to continue the current block transfer during suspend mode with the DEBUG MODE bit field of the GCTRL register set to '01'
  • The request transfer type TTYPE bit in the CHCTRL registers is set to frame trigger ('0')

Workaround(s):

Workaround #1:

Use TTYPE = block transfer ('1'), when the DEBUG MODE bit field is '01' (finish current block transfer)

or

Workaround #2:

Use the DMA DEBUG MODE = '00' (ignore suspend), when using TTYPE = frame transfer ('0') to complete the block transfer, even after suspend/halt is asserted.