SPRZ572A April   2024  – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-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 A Usage Notes and Advisories
    1. 3.1 Silicon Revision A 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 A Advisories
      1.      Advisory
      2.      Advisory
      3.      Advisory
      4.      Advisory
      5.      Advisory
      6. 3.2.1 Advisory
      7.      Advisory
      8. 3.2.2 Advisory
      9.      Advisory
      10. 3.2.3 Advisory
      11.      Advisory
      12.      Advisory
      13. 3.2.4 Advisory
      14.      Advisory
      15.      Advisory
      16.      Advisory
      17.      Advisory
      18.      Advisory
  6. 4Silicon Revision 0 Usage Notes and Advisories
    1. 4.1 Silicon Revision 0 Usage Notes
    2. 4.2 Silicon Revision 0 Advisories
      1.      Advisory
      2.      Advisory
      3.      Advisory
      4.      Advisory
      5. 4.2.1 Advisory
  7. 5Documentation Support
  8. 6Trademarks
  9. 7Revision History

Advisory

ePWM: An ePWM Glitch can Occur if a Trip Remains Active at the End of the Blanking Window

Revisions Affected

0, A

Details

The blanking window is typically used to mask any PWM trip events during transitions which would be false trips to the system. If an ePWM trip event remains active for less than three ePWM clocks after the end of the blanking window cycles, there can be an undesired glitch at the ePWM output.

Figure 3-2 illustrates the time period which could result in an undesired ePWM output.

TMS320F28P550SJ TMS320F28P559SJ-Q1 Undesired Trip Event and Blanking Window ExpirationFigure 3-2 Undesired Trip Event and Blanking Window Expiration

Figure 3-3 illustrates the two potential ePWM outputs possible if the trip event ends within 1 cycle before or 3 cycles after the blanking window closes.

TMS320F28P550SJ TMS320F28P559SJ-Q1 Resulting Undesired ePWM Outputs PossibleFigure 3-3 Resulting Undesired ePWM Outputs Possible

Workaround

Extend or reduce the blanking window to avoid any undesired trip action.