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TMS320F28062: TMS320F28062 input I/O port not respond to the input voltage or control signal?

user3830479
Expert 1090 points
Part Number: TMS320F28062


Dear all:

   Customer used TMS320F28062 for BLDC driver.  In mass-produced product testing, it was found that when the DSP may work for several days, It may occur that all input I/O port no longer respond to the input circuit voltage or control signal, and the communication, output, and other parts can work normally. What is the cause? can you give some advice?  

   By the way, Can I provide the output status of the I/O port when the DSP is not programmed or When the power-on, thanks!

  • 0
    TI__Guru* 95315 points
    1. Are you saying the input part of the GPIO pins no longer work, but the output part works fine?
    2. You say communication works. Any communication port has both i/p & o/p signals. Does the i/p part of the communication port work normally?
    3. Specifically, what pins’ i/p circuit no longer works? Have you checked if the V(IH) max levels presented to these pins are within datasheet limits? Can you share the details of external circuit connected to these pins?

    It is possible the input buffers of these are damaged. If that is the case, a few devices may need to be sent to TI for failure analysis.

    Can I provide the output status of the I/O port when the DSP is not programmed or When the power-on

    Sorry, I don’t understand what you mean by this. Please clarify.

  • 0 in reply to Hareesh Janakiraman
    TI__Guru* 95315 points

    Closing thread due to inactivity.