DDR test failure with 2Gb RAM

[liangchai]

E:\soloX\Broad Bring up\DDR test\Sol SoloX larger RAM\DDR_Stress_Tester_V1.0.3_ENCORE\Binary>DDR_Stress_Tester.exe -t mx6x -df scripts\my.txt

MX6SX opened.

HAB_TYPE: DEVELOP

Image loading...

download Image to IRAM OK

Re-open MX6x device.

Running DDR test..., press "ESC" key to exit.

******************************

    DDR Stress Test (1.0.3) for MX6SX

    Build: Jun 25 2014, 12:09:14

    Freescale Semiconductor, Inc.

******************************

=======DDR configuration==========

DDR type is DDR3

Data width: 16, bank num: 8

Row size: 14, col size: 10

Chip select CSD0 is used

Density per chip select: 256MB

==================================

What ARM core speed would you like to run?

Type 0 for 650MHz, 1 for 800MHz, 2 for 1GHz

  ARM set to 800MHz

Please select the DDR density per chip select (in bytes) on the board

Type 0 for 2GB; 1 for 1GB; 2 for 512MB; 3 for 256MB; 4 for 128MB; 5 for 64MB; 6

for 32MB

  DDR density selected (MB): 256

Calibration will run at DDR frequency 400MHz. Type 'y' to continue.

If you want to run at other DDR frequency. Type 'n'

  DDR Freq: 396 MHz

Would you like to run the write leveling calibration? (y/n)

  You have chosen not to run the write level calibration

Would you like to run the DQS gating, read/write delay calibration? (y/n)

Starting DQS gating calibration...

. . . . . . . . . . . . . . ERROR FOUND, we can't get suitable value !!!!

dram test fails for all values.

The DDR stress test can run with an incrementing frequency or at a static freq

To run at a static freq, simply set the start freq and end freq to the same valu

e

Would you like to run the DDR Stress Test (y/n)?

[CommunityBot · Accepted solution]

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NXP Community!

[igorpadykov]

Hi Liang

you can check common guidelines

Freescale i.MX6 DRAM Port Application Guide-DDR3

regarding "DQS gating calibration.... . . . . . . . . . . . . . ERROR FOUND, we can't get suitable value !!!!"

first time you can just ignore it and continue to run remaining tests, just check if they will work.

This error is caused by excessive board noise, one can try to play with

drive strength settings (both i.MX6 and DDR memory), try different DDR_SEL options, use WALAT=1

and decrease operating frequency as much as possible.

Best regards

igor