SPRZ193T January   2003  – December 2023 SM320F2812 , SM320F2812-EP , SMJ320F2812 , TMS320F2810 , TMS320F2810-Q1 , TMS320F2811 , TMS320F2811-Q1 , TMS320F2812 , TMS320F2812-Q1

 

  1.   1
  2. 1Introduction
  3. 2Device and Development Tool Support Nomenclature
  4. 3Device Markings
  5. 4Usage Notes and Known Design Exceptions to Functional Specifications
    1. 4.1 Usage Notes
      1. 4.1.1 PIE: Spurious Nested Interrupt After Back-to-Back PIEACK Write and Manual CPU Interrupt Mask Clear Usage Note
  6. 5Known 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
    23.     Advisory
    24.     Advisory
    25.     Advisory
    26.     Advisory
    27.     Advisory
    28.     Advisory
    29.     Advisory
    30.     Advisory
    31.     Advisory
  7. 6Documentation Support
  8. 7Trademarks
  9. 8Revision History

Advisory

SCI: Bootloader Does Not Clear the ABD Bit After Auto-Baud Lock

Revision(s) Affected

0, A, B, C, D, E, F and G

Details

The SCI ROM bootloader code does not clear the auto-baud detect (ABD) bit in the SCIFFCT register after the auto-baud process completes. If the SCI-A port is used after the bootloader is executed, transmit interrupts (SCITXINTA) will not be able to occur, nor will the auto-baud lock feature of SCI-A work correctly.

Workaround(s)

If the SCI bootloader has been executed, the user’s application code should clear the ABD bit by writing a 1 to ABD CLR (bit 14) in the SCIFFCT register before enabling the SCITXINTA interrupt, and before using the auto-baud feature.