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I.MX6Q  DDR3 calibration pass but DDR stress test failed

Question asked by wu guodong on Mar 19, 2019
Latest reply on Mar 20, 2019 by wu guodong
  • Hi,

     

  • We are facing an issue with the DDR3 on our imx6Q board.

  •  

    Our configuration
    =================

     I.MX6Q with 2GB DDR3(528MHz)    total 4pcs DDR3(  ISSI   IS43TR16256A  -15HBLI

Our results
===========

DDR Calibration pas;

BUT DDR stress test failed;

 

First time DDR stress test failed log

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

DDR Freq: 528 MHz

t0.1: data is addr test

Address of failure(step2): 0x5a6465d4

Data was: 0x5a646554

But pattern  should match address

Error: failed to run stress test!!!

 

Second time DDR stress test failed log

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

DDR Freq: 528 MHz

t0.1: data is addr test

Address of failure(step2): 0x5a8666cc

Data was: 0x5a86664c

But pattern  should match address

Error: failed to run stress test!!!

 

Third time DDR stress test failed log

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

DDR Freq: 528 MHz

t0.1: data is addr test

Address of failure: 0x5a5b6594

Data was: 0x5a5b6514

But pattern  should match address

Error: failed to run stress test!!!

 

Our questions:
=========
- is it a calibration issue, layout issue, or manufacturing issue?
- can anybody please tell us where to look at to diagnose the problem?

- how can we know the wrong data line quickly though DDR stress test ?

 

Thanks and Regards

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