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TMS320F28234: Power on Reset problem in the DSP boards. After power on DSP does not start working. it is in some start. After hard reset it start working.

Dnyaneshwar Sahane
Prodigy 150 points
Part Number: TMS320F28234

Dear TI Team,

I would request you to provide the solution on priority as we facing the problems in production.

We have developed the TMS320F28234 based boards for mask productions. in the beginning it is working properly but after more used of boards processor start fails on power on. it required a hard reset after power on. we are looking for the solution. what can be the problem.

Regards,

Dnyaneshwar Sahane

8655879300

Tata Power 

  • 0
    TI__Expert 7885 points
    Hello,

    Have you scoped the supply rails of the F28234 during power up to make sure there is not an overstress occurring on the device? Also have you scoped the external clock to see if the clock is starting? What is the state of the XRSn pin when the device is not working?

    Best Regards,
    Adam Dunhoft
  • 0 in reply to Adam Dunhoft
    Prodigy 150 points
    Thanks Adam for quick reply. Supply is fine . I will check both Clock and XRSn pin.
    Every time if you we give the hard reset it works fine. What can be the reason. can you just elaborate the things which u have noted........

    Regards,
    Dnyanesh
    India
  • 0 in reply to Dnyaneshwar Sahane
    Prodigy 150 points
    what do you mean by overstress occurring on device?
  • 0 in reply to Dnyaneshwar Sahane
    TI__Expert 7885 points
    By over-stress I mean supply voltages could be reaching magnitudes higher than the device can handle before it gets damaged or goes into an unknown/locked state where it needs to be power cycled before working again.

    Does this happen to all boards? Are boot pins set properly?

    Best Regards,
    Adam Dunhoft