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

3.2.2 Advisory

Analog Subsystem: Writes to Bit 1 of the ADCDACLOOPBACK Register are not Functional

Revisions Affected

0

Details

The register bit ADCDACLOOPBACK.ENLB2ADCB is non-functional, and writes to the bit have no effect. Consequently, the ADC-DAC loopback functionality for ADCB cannot be activated using this register.

Workaround

  • To test the functionality of the ADC as a diagnostic safety measure, use one of the two buffered DACs to output a known voltage, and sample the DAC voltage using ADCB. The output of DACA is on the same pin as channel B15, and the output of DACB is on B7.
  • Use the INTERNALTEST/ADC gain balancing mechanism to sample 0.9*VREFHI. For more details, see the Internal Test Mode section in the Analog-to-Digital Converter (ADC) chapter of the TMS320F28003x Real-Time Microcontrollers Technical Reference Manual .