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Question, i.MX6SoloLite uSDHC

Question asked by AVNET JAPAN FAE (team share account) on Feb 20, 2017
Latest reply on Feb 26, 2017 by Artur Petukhov

Dear team,

 

I would like to ask about uSDHC of i.MX6SoloLite.

[Q1]

The following statements are written in your i.MX6SL reference manual(IMX6SLRM, Rev.2) at the description of SDCLKFS.

"If setting SDCLKFS and DVS can generate same clock frequency,(For example, in SDR mode, SDCLKFS = 01h is same as DVS = 01h.) SDCLKFS is highly recommended. "

My customer’s understanding for your recommendation is to use only SDCLKFS than to use both of SDCLKFS and DVS.

Could you show me the actual difference between using only SDCLKFS and using both?

Can I understand the value of SDCLKFS should be larger among some combinations of SDCLKFS and DVS values?

[Q2]

After looking at the following thread of i.MX community;

https://community.nxp.com/message/555761

My customer thinks that DLL Enable will be automatically adjusted in the case of DLL_CTRL_SLV_OVERRIDE="0" & DLL_CTRL_ENABLE="1".

Is it true?

 

Thanks,

Miyamoto

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