Regarding SDIO as I/O device

[ashutoshnahar]

Hi

I am using SMARC card based on iMX6 solo platform.

The pin outs from  the SMARC based card has CD and WP(as GPIO pins from iMX6) along with CLK ,CMD and 4 Data lines.

So what will be the state of CD and WP if i am not using these line for my application.

If i am using SDIO as an I/O device is there any recommendation for data lines , cmd lines and clk .

because as per SDIO spec Data3 line need pull up.

I have attached the pins from SMARC card for your reference.

Kindly please confirm.

Regards

Ashutosh

[art]

Q. So what will be the state of CD and WP if i am not using these line for my application.

A. Both these pins should be tied to GND on the i.MX6 side.

Q. If i am using SDIO as an I/O device is there any recommendation for data lines , cmd lines and clk .

A. No external pull-ups/pull-downs are required on the data/cmd/clk lines for normal SDIO operation.

Have a great day,
Artur

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