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DRA750: I am having trouble, troubleshooting on why processor is not booting up

Ray Vincent Aranzaso
Genius 13535 points
Part Number: DRA750

Hi,

Good Day. I have a customer who is working with DRA752BPGABCQ1. Please see below his query for your reference. Thank you very much.

I am having trouble, troubleshooting on why processor is not booting up

I checked all power and clocks at XI_OS0, XI_OSC1, RTC_OSC_XI_CLKIN32. I am not seeing the RSTOUT_N not coming up. Is there anything else I could check?

we have multiple boards and this is the only one that stopped working

i'd like to know if there's a list of pins I c an check in order to lgocially make RSTOUT_N, HIGH

I was performing other test and noticed it had stopped working

Best Regards,

Ray Vincent

  • 0
    TI__Mastermind 39520 points

    With only single board failing and other boards working, design likely ok, just a manufacturing or component failure issue.  First thing to check is all power supplies.  Some of the supplies may be filtered (in-line component) - so make sure to check on the processor side of the filter (since the filter could be the failed component).  There are lots of supplies rails, and some are filtered separately - make sure to check all.  Input clock is the next item.  OSC0 is the required boot clock, make sure it is the correct frequency (must be 20, 27, or 19.2MHz.  The other clock inputs are optional, and not required to bring device out of reset.  Lastly is reset inputs.  Make sure the RTC_PORz and PORz are both held low during power-up, and driven high after power has stabilized.  Also ensure the reset inputs are valid logic levels (can be either 1.8V or 3.3V depending on other design aspects.  When all of those items are satisfied, the device should exit is internal reset mechanism and drive RSTOUTn high to indicate reset has exited.