LPDDR4 Stresstest fails with three frequency points but passes with single, yet highest frequency

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LPDDR4 Stresstest fails with three frequency points but passes with single, yet highest frequency

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NikJur
Contributor II

Hello everyone,

I am currently working on a board bring-up with the following combination of SOC, RAM and Software for the RAM-Stresstest:

- i.MX 8M Plus (1600 MHz) + Micron LPDDR4 4GB (MT53D1024M32D4DS)

- DDR Stresstest "mscale_ddr_tool_v3.21"

I have used the NXP RPA Excel sheet for generating the according ".ds"-file for the Stresstest program.

The question is as following:

Why does the Stresstest run smoothly and without errors, even under temperature fluctuations, when chosing 2000 MHz as the single frequency for the test, but fails when i chose the same parameterset, but now with three frequency points enabled. In that case the default, additional 200 MHz and 50 MHz, are tested as well. 

Thats especially strange, because the first frequency point under test is 2000 MHz and the test fails immediately at the first iteration during the "memcpy SSN armv8_x32 test", where the 2000 MHZ frequency point is used (?!?!). 

Bottomline:

1)How can it be that the same parameterset in the RPA sheet functions perfectly when only testing the highest, most layout/time critical frequency, but fails when i only enable the additional much lower frequency testpoints?

 

Any help is hugely appreciated

Greetings

Niko

 

 

 

 

 

 

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1 Solution
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Manuel_Salas
NXP TechSupport
NXP TechSupport

Hello @NikJur 

I hope you are doing well.

 

Could you please try again but now use the Config tools instead or mscale tool?

 

Config tools V15 works well for me.Also you can see the user guide for config tools in section 4 that is about of how to use DDR tool.

 

Best regards.

 

Salas.

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1,068 Views
NikJur
Contributor II

Hello @Manuel_Salas ,

its working now! Ergo i am doing well and hope that you do too:)

The solution was indeed the change of the testtool. 

Thank you very much!

 

Niko

1,088 Views
Manuel_Salas
NXP TechSupport
NXP TechSupport

Hello @NikJur 

I hope you are doing well.

 

Could you please try again but now use the Config tools instead or mscale tool?

 

Config tools V15 works well for me.Also you can see the user guide for config tools in section 4 that is about of how to use DDR tool.

 

Best regards.

 

Salas.