SPRZ496D October   2021  – May 2024 TMS320F280033 , TMS320F280034 , TMS320F280034-Q1 , TMS320F280036-Q1 , TMS320F280036C-Q1 , TMS320F280037 , TMS320F280037-Q1 , TMS320F280037C , TMS320F280037C-Q1 , TMS320F280038-Q1 , TMS320F280038C-Q1 , TMS320F280039 , TMS320F280039-Q1 , TMS320F280039C , TMS320F280039C-Q1

 

  1.   1
  2.   TMS320F28003x Real-Time MCUs Silicon ErrataSilicon Revision 0
  3. 1Usage Notes and Advisories Matrices
    1. 1.1 Usage Notes Matrix
    2. 1.2 Advisories Matrix
  4. 2Nomenclature, Package Symbolization, and Revision Identification
    1. 2.1 Device and Development-Support Tool Nomenclature
    2. 2.2 Devices Supported
    3. 2.3 Package Symbolization and Revision Identification
  5. 3Silicon Revision 0 Usage Notes and Advisories
    1. 3.1 Silicon Revision 0 Usage Notes
      1. 3.1.1 PIE: Spurious Nested Interrupt After Back-to-Back PIEACK Write and Manual CPU Interrupt Mask Clear
      2. 3.1.2 Caution While Using Nested Interrupts
      3. 3.1.3 Security: The primary layer of defense is securing the boundary of the chip, which begins with enabling JTAGLOCK and Zero-pin Boot to Flash feature
    2. 3.2 Silicon Revision 0 Advisories
      1. 3.2.1  Advisory
      2.      Advisory
      3.      Advisory
      4. 3.2.2  Advisory
      5.      Advisory
      6.      Advisory
      7.      Advisory
      8.      Advisory
      9. 3.2.3  Advisory
      10.      Advisory
      11. 3.2.4  Advisory
      12.      Advisory
      13.      Advisory
      14.      Advisory
      15. 3.2.5  Advisory
      16.      Advisory
      17. 3.2.6  Advisory
      18. 3.2.7  Advisory
      19.      Advisory
      20. 3.2.8  Advisory
      21.      Advisory
      22. 3.2.9  Advisory
      23. 3.2.10 Advisory
      24.      Advisory
      25.      Advisory
      26.      Advisory
      27.      Advisory
  6. 4Documentation Support
  7. 5Trademarks
  8. 6Revision History

Advisory

SDFM: Dynamically Changing Threshold Settings (LLT, HLT), Filter Type, or COSR Settings Will Trigger Spurious Comparator Events

Revision Affected

0

Details

When SDFM comparator settings—such as filter type, lower/upper threshold, or comparator OSR (COSR) settings—are dynamically changed during run time, spurious comparator events will be triggered. The spurious comparator event will trigger a corresponding CPU interrupt, CLA task, ePWM X-BAR events, and GPIO output X-BAR events if configured appropriately.

Workaround

When comparator settings need to be changed dynamically, follow the procedure below to ensure spurious comparator events do not generate a CPU interrupt, CLA task, or
X-BAR events (ePWM X-BAR/GPIO output X-BAR events):

  1. Disable the comparator filter.
  2. Delay for at least a latency of the comparator filter + 3 SD-Cx clock cycles.
  3. Change comparator filter settings such as filter type, COSR, or lower/upper threshold.
  4. Delay for at least a latency of the comparator filter + 5 SD-Cx clock cycles.
  5. Enable the comparator filter.