Fails to boot on i.MX6SL custom board. not working

[jasperkim]

@

Hi all.

I am using IMX6 solo lite our custom board based on the MCIMX6SLEVK Board.

MCU and LPDDR2 was used part of reference board below.

• MCU: MCIMX6L8DVN10AB
• LPDDR2: MT42L256M32D2

Now I am having some problems on booting the processor.

I have been trying to get booting SD card on a our custom board.

But when I boot, my SD card isn't booting.

And e-Ink display doesn't work with no response.

Of course I was used release EVK SD Card and default DIP switches settings. (SD2)

Booting is not in progress, the results measured in the Signal SD2 Connector CMD & CLK Signal is not output after the output once after the power input.

(The same in the Board MCIMX6SLEVK was confirmed that the output is continuously measured.)

If you don’t mind, please answer below questions.

Q1. Booting error whether the reason is due to the difference between Version of the MCU?

Q2. To a boot should I any work on MCU or LPDDR2?

Q3. Is there a reason why this boot error is related to Impedance matching?

Q4. Is there any other reason, estimated to see the phenomenon? Or check to see if we have made?

Q5. If I want to use eMMC, do I need to do?

Any pointers would be of great help.

[igorpadykov · Accepted solution]

Hi Junsil

EVK SD Card will not work on custom board as it may have different

MMDC configuration (including Impedance matching/drive strength settings).

So first necessary to run ddr test and find new ddr settings for custom board

and update them in uboot/../mx6slevk/imximage.cfg file

i.MX6/7 DDR Stress Test Tool V2.40

This is described in attached Porting Guide, also pay attention to

Chapter 2 Configuring the IOMUX Controller, if custom board uses different

pads than MCIMX6SLEVK Board.

Best regards

igor

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[jasperkim]

Hi igor

First of all, I appreciate your kind help,

And I'm sorry to bother you for more asking to you.

Now I am testing to the Android 4.0.4 IMX6 custom board (with e-ink display).

But Our custom board S/W version and you mentioned version (i.MX_BSP_Porting_Guide.pdf) are different,

I can not follow that document.

Below is the information that I'm referencing to the development board.

• Android User Guide - Document Number : AUG, Rev. 13.5.0_GA, 11/2012
• Android 4.0.4
  
• Ubuntu 11.04 64bit

So, Is there any other BSP porting guide document for this version?

Thanks.