tCKELCK issue on mscale_ddr_tool of IMX8M EVK

[mikesu]

Topic :  tCKELCK issue on mscale_ddr_tool of IMX8M EVK .

When I run mscale_ddr_tool on imx8m EVK and found out that

1. some lpddr4 can't pass mscale_ddr_test stress test by version 2.1 but pass version beta.

    This failure would happen at hot temperature only. All samples could pass at room temperature.

2.  After comparing btween V2.1 and beta version , we found out that

     a. V2.1 (V1.1 are the same) : CKE toggle 2 times at the beginning of stress test

         While CKE  toggle, its tCKELCK is 0ns and against its specification.

         Even we changed setup value of tCKELCK of ds file, tCKELCK still kept 0ns

     b. V beta: CKE always keep high within stress test

3. Please see the attached file for the detailed waveforms and information

Request : could you fix up this tCKELCK issue of mscale_ddr_tool?

[Yuri]

Hello,

  The issue will be fixed in the next release.

Regards,

Yuri.

[oliver_chen]

Hi YuriMuhin_ng‌,

This issue is only happened in DDR tool stress test function, not in timing parameters, generated code and uboot/Linux. Customer can use current DDR tool in their projects without any problems.

B.R

Oliver

[oliver_chen]

Hi,

Now I'm working with customers to find the root cause.

B.R

Oliver