DDR_Stress_Tester_V1.0.3 RUN FAILD

[Harris]

Dears：

We had designed a custom board based on iMX6-sdb

IMX6Q5EYM10AD  We have using 4 parts DDR3 1GB   4pcs

Hynix H5TQ2G63GFR-RD。

DDR_Stress_Tester_v1.0.3  test  3pcs board ,   result is below.

please tell me the result is which  is wrong .and i need do 。

or tell me data was means what?

pattern was what?

source  is wrong means ?

and address of source failure is what ?

Thank you very much.

[igorpadykov]

Hi Harris

from log memory test writes to address 0x11000000 all "1" but reads

back "0" on some pads, like E9CFFFFF e.t.c. One can attach jtag

debugger and manually write/read to that address data, checking waveforms

with oscilloscope. Changing drive strength on these pads may help.

Varying temperature is one method to narrow down the root cause

- If cooling down the part causes more failures, then it is likely the drive strength

is too high causing more overshoots and undershoots

- If heating up the part causes more failures, then the drive strength is too low and

the signals may not rise/fall fast enough

Best regards

igor

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