How to enable SDIO of SAMA5D2?

Discussion around products based on ARM Cortex-A5 core.

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arudzins
Posts: 10
Joined: Tue Oct 03, 2017 11:29 am

How to enable SDIO of SAMA5D2?

Tue Oct 10, 2017 11:21 am

Hello,

I can't find that in documentation: how to tell SDMMC interface of SAMA5D2 to operate in SDIO mode?

Best regards,
Adam
blue_z
Location: USA
Posts: 1560
Joined: Thu Apr 19, 2007 10:15 pm

Re: How to enable SDIO of SAMA5D2?

Tue Oct 10, 2017 11:06 pm

> I can't find that in documentation: how to tell SDMMC interface of SAMA5D2 to operate in SDIO mode?

In what "documentation" are you looking?
There's a section on that topic in the SoC datasheet that seems clear enough:
51.9 SD/SDIO Operating Mode

The SDMMC is fully compliant with the “SD Host Controller Simplified Specification V3.00” for SD/SDIO devices.
Refer to this specification for SDMMC configuration.

iOW you need to fetch another document from sdcard.org.

Regards
arudzins
Posts: 10
Joined: Tue Oct 03, 2017 11:29 am

Re: How to enable SDIO of SAMA5D2?

Thu Oct 12, 2017 9:54 am

Microchip's support has explained to me, that the controller automatically enters SDIO mode based on the current command. That's what I needed to know.
Best regards,
Ada,
lz6661
Posts: 25
Joined: Thu Oct 31, 2013 10:47 am

Re: How to enable SDIO of SAMA5D2?

Tue Oct 24, 2017 11:52 am

On our MYD-JA5D27 board, the SDIO is through MMC interface, it needs to add SDIO device and relative driver.
http://www.myirtech.com/list.asp?id=554

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