SPRZ572B April   2024  – February 2025 TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SG-Q1 , 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

ADC: Degraded ADC Performance With ADCCLK Fractional Divider

Revisions Affected

0, A

Details

Using fractional SYSCLK-to-ADCCLK dividers (controlled by the ADCCTL2.PRESCALE field) has been shown to cause degradation in ADC performance on this device. See Table 3-1.

Table 3-1 ADCCTL2 Register
REDUCED PERFORMANCE
BITFIELDVALUEDESCRIPTION
3–0PRESCALE0001ADCCLK = SYSCLK/1.5
0003ADCCLK = SYSCLK/2.5
...
NORMAL PERFORMANCE
BITFIELDVALUEDESCRIPTION
3–0PRESCALE0000ADCCLK = SYSCLK/1.0
0002ADCCLK = SYSCLK/2.0
...

Workaround

Use even PRESCALE clock divider values. Even PRESCALE values result in integer clock dividers which do not impact the ADC performance.