Question, i.MX6SoloLite SD Card Interface

[Aemj]

Dear team,

I would like to ask about SPEED and SRE bit field setting of i.MX6SoloLite IOMUXC_SW_PAD_CTL_PAD_xxx register.

My customer is facing the issue that they sometimes saw CRC error on SD Card data transfer between i.MX6SoloLite. And they think SPPED and SRE setting of IOMUXC_SW_PAD_CTL_PAD_xxx registers might affect it.

(1)

What values should be set to SPEED bit field of IOMUXC_SW_PAD_CTL_PAD_xxx registers?

The customer is using SD Card interface of i.MX6SL as SDR-50.

(2)

What values should be set into SRE field of IOMUXC_SW_PAD_CTL_PAD_xxx registers for related pads? And could you show me what is changed actually by the setting of SRE bit?

Thanks,

Miyamoto

[Yuri]

Hello,

  I hope app note AN5078 (Influence of Pin Setting on System Function
and Performance) clarifies the issue.

http://cache.freescale.com/files/32bit/doc/app_note/AN5078.pdf 

Have a great day,

Yuri

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