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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?

Re: imx93 lpddr4x config for JSL4BAG16 unstable

No, I haven't. We are using the off-the-shelf frdm-imx93 boards with the off-the-shelf images as provided by the flex-installer.

the getting started manual does not mention an "i.Mx config tool".

what would be the procedure? Is there a manual and what steps do need to be replaced in the getting started?

does this also mean we cannot use 1 standard image for all frdm-imx93 boards but need to check each board or have two or three image versions depending on the on-board ddr?

do mind, we're expecting an off-the-shelf behavior for us and our (shared) customers.

Re: imx93 lpddr4x config for JSL4BAG16 unstable

HI SynchronicIT :

Have you passed the DDR test with "i.MX config tool" ? You need to pass it first, and then use the lpddr4x_timging.c generated by "i.MX config tool".

Re: imx93 lpddr4x config for JSL4BAG16 unstable

HI :

I seems that you are using the NXP official "FRDM i.MX 93 development board" and the official release. It should be ok. You don't need to do "DDR test". I don't have the "FRDM board". Maybe you can reference to the document from NXP of how to use the board.