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Random DDR3 Write Failures

Visitor
Posts: 7
Registered: ‎12-20-2016

Random DDR3 Write Failures

I am bringing up a new Ultrascale design using DDR3.  The design always passes calibration but randomly has write failures.   Some of the bytes in the calibration margin window are highlighted orange.  I'm wondering if this may be contributing to my random write failures.  Should I be concerned by these orange highlights?

 

mig_cal.jpg
Moderator
Posts: 4,463
Registered: ‎08-01-2008

Re: Random DDR3 Write Failures

which device and core version.
check this ARs in case helps
https://www.xilinx.com/support/answers/35094.html
Thanks and Regards
Balkrishan
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Visitor
Posts: 7
Registered: ‎12-20-2016

Re: Random DDR3 Write Failures

I'm using an Ultrascale XCKU035.  The DDR3 core is DDR3 SDRAM  (MIG) (1.1) in Vivado 2015.4.

Moderator
Posts: 5,128
Registered: ‎09-20-2012

Re: Random DDR3 Write Failures

Hi @jduchez

 

What is the memory clock frequency? Are you following all design guidelines from PG150?

Thanks,
Deepika.
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