SPRZ569B November   2024  – September 2025 F29H850TU , F29H859TU-Q1

 

  1.   1
  2.   F29H85x, F29P58x, and F29P32x MCUs Silicon Errata Silicon Revisions A, 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 B Usage Notes and Advisories
    1. 3.1 Silicon Revision B Usage Notes
    2. 3.2 Silicon Revision B Advisories
      1.      Advisory
      2. 3.2.1  Advisory
      3.      Advisory
      4. 3.2.2  Advisory
      5. 3.2.3  Advisory
      6. 3.2.4  Advisory
      7. 3.2.5  Advisory
      8. 3.2.6  Advisory
      9. 3.2.7  Advisory
      10.      Advisory
      11. 3.2.8  Advisory
      12.      Advisory
      13.      Advisory
      14.      Advisory
      15. 3.2.9  Advisory
      16. 3.2.10 Advisory
  6. 4Silicon Revision A Usage Notes and Advisories
    1. 4.1 Silicon Revision A Usage Notes
      1. 4.1.1 Security: New TI Keys Programmed on Silicon Revision B Devices
    2. 4.2 Silicon Revision A Advisories
      1. 4.2.1 Advisory
      2. 4.2.2 Advisory
      3. 4.2.3 Advisory
      4. 4.2.4 Advisory
      5. 4.2.5 Advisory
  7. 5Silicon Revision 0 Usage Notes and Advisories
    1. 5.1 Silicon Revision 0 Usage Notes
    2. 5.2 Silicon Revision 0 Advisories
      1. 5.2.1 Advisory
      2. 5.2.2 Advisory
  8. 6Documentation Support
  9. 7Trademarks
  10. 8Revision History

3.2.2 Advisory

ePWM: ePWM TZFRC and TZCLR Events may be Missed When PERCLKDIVSEL.EPWMCLKDIV = 1

Revisions Affected

0, A, B

Details

The TZFRC bit is used for software-forced trip events, while the TZCLR bit is used for clearing the trip-zone events. On devices with EPWMCLKDIV, the TZFRC and TZCLR write may be missed and leave the output unaffected if PERCLKDIVSEL.EPWMCLKDIV is programmed to 1. This bit is programmed to 1 by default (EPWMCLK is PLLSYSCLK/2).

Workaround

  1. Configure EPWMCLK = PLLSYSCLK (PERCLKDIVSEL.EPWMCLKDIV = 0).
  2. If the user has to configure EPWMCLK = PLLSYSCLK/2 (PERCLKDIVSEL.EPWMCLKDIV = 1), select one of the reserved mux inputs of EPWMXBAR to be used for the trip using the following driverlib software sequence.

PWMXBAR → Digital Compare → Trip Zone

  1. Configure both trip zone actions for Digital Compare Output A Event 1/2 Action On EPWMxA and Digital Compare Output B Event 1/2 Action On EPWMxB.
    • EPWM_setTripZoneAction()
  2. Configure the input signals for TRIPIN1-15 or the ORed Combinational logic of TRIPIN1-15.
    • EPWM_selectDigitalCompareTripInput()
  3. Configure the Digital Compare condition for DCAEVT1/2 and DCBEVT1/2.
    • EPWM_setTripZoneDigitalCompareEventCondition()
  4. Configure the PWMXBAR Input to the Digital Compare Submodule to reserved.
    • XBAR_selectEpwmXbarInputSource()

Application Code

To trip the PWMs, you can invert the PWMXBAR state using XBAR_invertOutputSignal().