SPRZ342O January   2011  – April 2021 TMS320F28062 , TMS320F28062-Q1 , TMS320F28062F , TMS320F28062F-Q1 , TMS320F28063 , TMS320F28064 , TMS320F28065 , TMS320F28066 , TMS320F28066-Q1 , TMS320F28067 , TMS320F28067-Q1 , TMS320F28068F , TMS320F28068M , TMS320F28069 , TMS320F28069-Q1 , TMS320F28069F , TMS320F28069F-Q1 , TMS320F28069M , TMS320F28069M-Q1

 

  1.   Abstract
  2. 1Usage Notes and Advisories Matrices
    1. 1.1 Usage Notes Matrix
    2. 1.2 Advisories Matrix
  3. 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
  4. 3Silicon Revision B Usage Notes and Advisories
    1. 3.1 Silicon Revision B 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 CAN Bootloader: Internal Oscillator Tolerance is Not Sufficient for CAN Operation at High Temperatures
      3. 3.1.3 FPU32 and VCU Back-to-Back Memory Accesses
      4. 3.1.4 Caution While Using Nested Interrupts
      5. 3.1.5 Flash: MAX "Program Time” and “Erase Time” in Revision G of the TMS320F2806x Piccolo™ Microcontrollers Data Manual are only Applicable for Devices Manufactured After January 2018
    2. 3.2 Silicon Revision B Advisories
      1.      Advisory
      2.      Advisory
      3.      Advisory
      4.      Advisory
      5.      Advisory
      6.      Advisory
      7.      Advisory
      8.      Advisory
      9.      Advisory
      10.      Advisory
      11.      Advisory
      12.      Advisory
      13.      Advisory
      14.      Advisory
      15.      Advisory
      16.      Advisory
      17.      Advisory
      18.      Advisory
      19.      Advisory
      20.      Advisory
      21.      Advisory
      22.      Advisory
      23.      Advisory
      24.      Advisory
      25.      Advisory
      26.      Advisory
      27.      Advisory
  5. 4Silicon Revision A Usage Notes and Advisories
    1. 4.1 Silicon Revision A Usage Notes
    2. 4.2 Silicon Revision A Advisories
  6. 5Silicon Revision 0 Usage Notes and Advisories
    1. 5.1 Silicon Revision 0 Usage Notes
    2. 5.2 Silicon Revision 0 Advisories
      1.      Advisory
      2.      Advisory
      3.      Advisory
  7. 6Documentation Support
  8. 7Trademarks
  9. 8Revision History

Advisory

GPIO: GPIO Qualification

Revision(s) Affected

0, A, B

Details

If a GPIO pin is configured for "n" SYSCLKOUT cycle qualification period
(where 1 ≤ n ≤ 510) with "m" qualification samples (m = 3 or 6), it is possible that an input pulse of [n * m – (n – 1)] width may get qualified (instead of n * m). The occurrence of this incorrect behavior depends upon the alignment of the asynchronous GPIO input signal with respect to the phase of the internal prescaled clock, and hence, is not deterministic. The probability of this kind of wrong qualification occurring is "1/n".

Worst-case example:

If n = 510, m = 6, a GPIO input width of (n * m) = 3060 SYSCLKOUT cycles is required to pass qualification. However, because of the issue described in this advisory, the minimum GPIO input width which may get qualified is [n * m – (n – 1)] = 3060 – 509 = 2551 SYSCLKOUT cycles.

Workaround(s)

None. Ensure a sufficient margin is in the design for input qualification.