DDR Stress Test Questions

bcstewart — Tue, 28 Nov 2017 00:20:19 GMT

Hi,

I am running DDR Stress Tester V2.7 on a iMX6DQ. I am using the GUI version.

I have some questions.

1. Both the calibration and stress tests report the CPU clock frequency is 1GHz. I tried using the pull-down menu to change to 800MHz, but it doesn't change the value in the result window. I am using a industrial version of iMX6 so max CPU speed is 800MHz. How can I verify the CPU runs at 800MHz? Will this affect the calibration values? Does it matter?

2. Calibration and Stress report V2.6. I am using 2.7. https://community.nxp.com/docs/DOC-105652 Why is there a difference? Is it an error?

============================================
        DDR Stress Test (2.6.0)
        Build: Aug 1 2017, 17:33:25
        NXP Semiconductors.
============================================

3. What does setting the MR1 value do? Does it change SRC_SBMR1 or SRC_SBMR2?

4. Is there more documentation available to explain what some of the numbers mean during calibration and test beyond this post: i.MX6/7 DDR Stress Test Tool V2.70

Re: DDR Stress Test Questions

Yuri — Tue, 28 Nov 2017 03:48:17 GMT

Hello,

I just check "the pull-down menu to change to 800MHz" of the i.MX6/7 DDR Stress Test Tool V2.70.

It works with my i.MX6 SDP.

I used https://community.nxp.com/servlet/JiveServlet/download/105652-32-407585/ddr_stress_tester_v2.70.exe.zip

Look at the following regarding MR1

https://community.nxp.com/message/562332

You may look at
Freescale i.MX6 DRAM Port Application Guide-DDR3

Have a great day,
Yuri

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DDR Stress Test Questions

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