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Migrating from Micron to Samsung DDR

Question asked by Durgesh Saxena on Oct 4, 2017
Latest reply on Oct 4, 2017 by Yuri Muhin

Dear All,

My board is based on sabreSD design. Frist generation of the board has same components used in the sabreSD board. 

 

Now I have changed DDR from Micron to Samsung. DDR details are as follows.

 

MICRON

MT41K256M16TW 

MT41K256M16TW

My board works perfectly fine with Micron RAM. 

 

SAMSUNG

K4B4G1646D-BMK0

K4B4G1646D-BMK0

My board is giving strange results with Samsung RAM.

Following are the observations:

1. U-boot boots fine.

2. I can use all u-boot commands and till u-boot everything looks fine.

3. Many times, splash screen from u-boot is distorted.

4. Board crashes after u-boot. no specific place of a crash. The crash is random.

5. Linux kernel also boots up 1 out of 30 times but the display looks noisy and board works for some time before the crash.

 

I need your expert comments to locate Root cause. If required I can provide logs and board schematics for review.

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