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[#1]

imx93 lpddr4x config for JSL4BAG16 unstable

hi experts:

    I have a problem about lpddr4x config for  JSL4BAG16,  after config , it passes "functional" test,  but sometimes fail at "Optimization->Vref for CA optimization",  not fail all the time, but sometimes.

    When test "vTSA ->CA eye",  it shows pass, but some "error log" shows also.

    I have a question about how to tune the "Vref DQ config" and "Vref CA config" ? JSL4BAG16's Vref  value  is difference with "Microns which used in EVK", does it need to set rang 0 or rang 1 ?  

   And as I know, the Vref DQ is config according to "eye diagram" test result , but there are "read diagram" and "write diagram" , which one should I use? 

    I have attached the datasheet of JSL4BAG and "CA eye" test log and mex file.

   Best Regards.

Re: imx93 lpddr4x config for JSL4BAG16 unstable

Hello,

The LPDDR4X is part of the https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-93-Memory-Compatibility-Guide/ta-p/...

For Vref DQ tuning use Range 1 (default) for JSL4BAG16 and use the write eye diagram, not read.

Do not reuse Micron/EVK settings, always retune Vref for your JSL4BAG16.

Re: imx93 lpddr4x config for JSL4BAG16 unstable

HI Oswalag:

       Thanks for reply . I have passed the test with "i.MX config tool",  and use the "Vref" of DQ and CA in the "Optimization" test result. 

     But still has two problem:

    1. some board , it could not show "CA Charts" , "CA Eye" test has some error, but it shows pass

    2. After update the lpddr4x_timing.c which generated by "i.MX config tool" with all passed board,  when I run "memtest" in system, it will fail at "Stuck Address" , not always, but sometimes.

    Best Regards. 

Re: imx93 lpddr4x config for JSL4BAG16 unstable

I have the same chip on my frdm-imx93 board that doesn't boot properly with the off the shelf images. How to solve it?