米6体育平台手机版

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

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1Introduction
2Device and Development Tool Support Nomenclature
3Device Markings
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
5Known Design Exceptions to Functional Specifications
1. Advisory
2. Advisory
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27. Advisory
28. Advisory
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30. Advisory
31. Advisory
6Documentation Support
7Trademarks
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.