AnsweredAssumed Answered

About eMMC boot failure in i.MX6DL.

Question asked by Keita Nagashima on Aug 21, 2015
Latest reply on Oct 18, 2015 by Yuri Muhin

Dear All,

 

[Overview]

Device : i.MX6DL + PF0100A

OS/Version : Linux L3.0.35_4.1.0

Issue : Repeart the Re-boot

Failure rate : 10 per 22,000units (Very rare units)

Target Board : Custom board

Detail :

The custom board boot-up from eMMC.

But, the failure board repeat the re-boot because of changing the status bit on eMMC (DEVICE is locked).

 

My customer measured the waveform between i.MX and eMMC at boot-up.

The waveform found the different about behavior of SD4_CLK.

*Refer to below waveform.

We want to confirm the whether or not right operation.

 

Waveform_boot(i.MX-eMMC).bmp

 

 

[Question]

Could you give me an advice about the possible causes?

(Does On-chip boot ROM in i.MX6 have an influence?)

 

 

Best Regards,

Keita

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