limitation in Imx6- for setting SDR12 up to 25Mhz.

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limitation in Imx6- for setting SDR12 up to 25Mhz.

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nagamaheshg
Contributor III

We have enabled sdhci to work at 1.8V at the Device tree level, there is level translator for 1.8v switching.

 

We are able to see the signal levels at 1.8v for clock setting from the Imx6  for 50Mhz and we can see data transfers working.

Issue here is when we go for 25Mhz setting from Imx sdhci host with 1.8v level, we see only 22 Mhz on the SD CLK line.

So we wanted to know if there is any limitation in Imx for setting SDR12 up to 25Mhz.

Note: I have tried setting 20Mhz, 30Mhz and 50Mhz at 1.8V from Imx sdhci host and it works.

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2 Replies

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Bio_TICFSL
NXP TechSupport
NXP TechSupport

Hi Nagamahesh,

Look at the previus test https://community.nxp.com/message/459408

Hope it helps

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nagamaheshg
Contributor III

Hi,

When I click on the link which you have shared, it shows unauthorized.

https://community.nxp.com/thread/331667?commentID=459408#comment-459408 

Regards

Nagamahesh Gamidi

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