SPRZ295Q April   2009  – January 2019 TMS320F28030 , TMS320F28030-Q1 , TMS320F28031 , TMS320F28031-Q1 , TMS320F28032 , TMS320F28032-Q1 , TMS320F28033 , TMS320F28033-Q1 , TMS320F28034 , TMS320F28034-Q1 , TMS320F28035 , TMS320F28035-EP , TMS320F28035-Q1

 

  1.   TMS320F2803x Piccolo MCUs Silicon Revisions A, 0
    1. 1 Introduction
    2. 2 Device and Development Support Tool Nomenclature
    3. 3 Device Markings
    4. 4 Usage 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
        2. 4.1.2 CAN Bootloader: Internal Oscillator Tolerance is Not Sufficient for CAN Operation at High Temperatures
        3. 4.1.3 Flash: MAX "Program Time” and “Erase Time” in Revision L of the TMS320F2803x Piccolo™ Microcontrollers Data Manual are only Applicable for Devices Manufactured After April 2017
      2. 4.2 Known Design Exceptions to Functional Specifications
    5. 5 Documentation Support
  2.   Trademarks
  3.   Revision History

4.1.2 CAN Bootloader: Internal Oscillator Tolerance is Not Sufficient for CAN Operation at High Temperatures

Revision(s) Affected: 0, A

The CAN bootloader in the device's boot ROM uses the internal oscillator as the source for the CAN bit clock. At high temperatures, the frequency of the internal oscillator can deviate enough to prevent messages from being received.

Workaround: Recalibrate the internal oscillator before invoking the CAN bootloader. This can be done in application code. For more flexibility, a wrapper function may be programmed into the device's OTP memory. See the Using the Piccolo™ CAN Bootloader at High Temperature Application Report for details on how to implement this workaround.