SPRZ171T December   2004  – September 2020 SM320F2801-EP , SM320F2808-EP , TMS320F2801 , TMS320F2801-Q1 , TMS320F28015 , TMS320F28016 , TMS320F28016-Q1 , TMS320F2802 , TMS320F2802-Q1 , TMS320F2806 , TMS320F2806-Q1 , TMS320F2808 , TMS320F2808-Q1 , TMS320F2809 , TMS320F2809-Q1

 

  1. 1Introduction
  2. 2Device and Development Tool Support Nomenclature
  3. 3Device Markings
  4. 4Silicon Change Overview
  5. 5Usage Notes and Known Design Exceptions to Functional Specifications
    1. 5.1 Usage Notes
      1. 5.1.1 PIE: Spurious Nested Interrupt After Back-to-Back PIEACK Write and Manual CPU Interrupt Mask Clear Usage Note
    2. 5.2 Known Design Exceptions to Functional Specifications
      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
  6. 6Documentation Support
  7. 7Trademarks
  8. 8Revision History

Advisory

WD: Change to Watchdog Module: Bad Key Writes to WDKEY No Longer Cause RESET/Interrupt to be Generated

Revision(s) Affected

0, A on F2809 silicon

A on C280x silicon

C on F2801, F2802, F2806, F2808, and F2801x silicon

Details

The “Bad Key Detect” function of the WDKEY register has been disabled. When using the Watchdog (WD) module, a write of anything other than 0x55 or 0xAA to the WDKEY register will have no effect. See the TMS320x280x, 2801x, 2804x DSP System Control and Interrupts Reference Guide for more information.

Workaround(s)

To trigger an immediate reset or interrupt, perform an invalid write to the WDCHK bits in the WDCR register.