SWRZ098 April   2021 AWR6443

 

  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#36
    11.     MSS#37B
    12.     MSS#38A
    13.     MSS#39
    14.     MSS#40
    15.     MSS#41
    16.     MSS#43A
    17.     MSS#44
    18.     MSS#45
    19.     ANA#11A
    20.     ANA#12A
    21.     ANA#13B
    22.     ANA#14
    23.     ANA#15A
    24.     ANA#16
    25.     ANA#17A
    26.     ANA#18B
    27.     ANA#19
    28.     ANA#20
    29.     ANA#21A
    30.     ANA#22A
    31.     ANA#27A
  7. 7Trademarks
  8. 8Revision History

ANA#16

LVDS Coupling to Clock System

Revision(s) Affected:

AWR6443 ES2.0

Description:

The digital activity in the High-Speed Serial Interfaces (HSI) state machine can couple to the clock system/FMCW synthesizer and can cause spurs in its clock output. The spur frequency is HSI rate dependent (for example, for a 600-MHz HSI clock rate, 6.25-MHz and 12.5-MHz spurs can be observed on TX/RX output, and for a 900-MHz HSI clock rate, 7-MHz and 14-MHz spurs can be observed on the TX/RX output). The spur levels are low (near or below -65 dBc).

Workaround(s):

The spur will not be present, when the LVDS is not used.