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MicroZed randomly resetting

Former Member

Microzed randomly resets.  Rarely running more than 24 hours.  Sometimes resetting every few minutes. 

Reset frequency possibly a function of activity.  MicroZed powered from USB.  Maybe some power valid sensor is triggering a reset??

Anybody else seen this?

llj

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  • 0

    Does your carrier board supply power to the MicroZed board? Have you estimated the power requirements of the MicroZed including the FPGA image you are loading. Have you monitored the power rails during the restart event to see if they are staying stable?

     

    There are a couple of signals on the microheaders to the carrier card that can cause a reset. Take a look at the MicroZed Carrier Design Guide here for details: http://www.zedboard.org/documentation/1519

     

    If you are able to share your design I can try it on a MicroZed powered by our IO Carrier Card to see if we can observe the restart event in this configuration.

     

    -Gary

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  • 0

    Does your carrier board supply power to the MicroZed board? Have you estimated the power requirements of the MicroZed including the FPGA image you are loading. Have you monitored the power rails during the restart event to see if they are staying stable?

     

    There are a couple of signals on the microheaders to the carrier card that can cause a reset. Take a look at the MicroZed Carrier Design Guide here for details: http://www.zedboard.org/documentation/1519

     

    If you are able to share your design I can try it on a MicroZed powered by our IO Carrier Card to see if we can observe the restart event in this configuration.

     

    -Gary

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  • 0 in reply to Former Member

    Yes, my carrier card supplies power to the microzed.  I have a 24V->5V 3A Texas Instruments power supply that I supply to the Vin headers.  I have not done a formal power estimation yet, as informally I calculated 3A as overkill.  (Note that the resets I'm seeing also occur when booting from QSPI with the manufacturer-installed boot image.)  I have monitored the power rails, but not when I've seen a reset.  What levels of fluctuation could cause a reset? 

    I've looked through the documentation.  It seems that PG_MODULE, PWR_ENABLE, and CARRIER_SRST# and possibly INIT# could cause a reset.  (Am I missing any?) PG_MODULE, INIT# and CARRIER_SRST# are floating.  PWR_ENABLE is coming off my 5V power quality monitor.  I just noticed that my VCCO34 and VCCO35 are not enabled by PG_1V8 as recommended.  Could that cause this problem? 

  • 0 in reply to rconraduw

    Having the VCCO34 or VCCO35 supplied before the PG_1V8 may cause a situation where the Zynq device can be damaged over repeated power cycles, but I don't think it is likely to be the caues of the restarts you are seeing.

     

    I will contact you offline to discuss your specfic MicroZed + carrier board.

     

    -Gary