DDR stress test failed on DQS gating calibration!

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DDR stress test failed on DQS gating calibration!

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oliverkuo
Contributor IV

Hi,

 

I'm working on a custom board with i.MX6Q and facing some problem, system hang while bootloader booting.

I use DDR Stress Test 2.20 to check DDR3 stability and failed on DQS gating calibration(log attached).

Is there any way I can debug this problem?

Thanks for any suggestion.

 

Best regards,

Oliver

Original Attachment has been moved to: ddr_calibration_20160628-11'39'47_SMA-IMX6CS-V0.3.log.zip

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Yuri
NXP Employee
NXP Employee

Hello,

please try to check the design, using section 1.1 (Schematic and Layout

Design Rules) of the DDR3 Porting Guide

Freescale i.MX6 DRAM Port Application Guide-DDR3

In particular, there is an Excel page named “MX6 DRAM Bus Length Check” in

“HW Design Checking List for i.Mx6”. Designer can use it for layout self-checking.

Input trace length of the design into cells in pink circle then, the bottom cell in same

column may change to red color if layout breaks the rule.

Recent design checklist may be found at

HW Design Checking List for i.MX6DQSDL

Have a great day,
Yuri

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