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How do I check the MMC or SD cards before the card identification process in STM32?

Carter Lee
Associate III

‎2023-04-05 08:29 PM

In the RM0090 Rev 19 document of the STM32, there is a card identification process explanation,

The card identification process differs for MultiMediaCards and SD cards.

It seems that the card identification process is different for MMC and SD, but since the card identification process is different for each card, it would be more efficient if the user knows which (MMC/SD) card is used in advance and proceeds with the card identification process accordingly, but there is no explanation, only the card identification process description for each card, so it is difficult to understand.

How do I check the MMC or SD cards before the card identification process in STM32?

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AScha.3
Chief III

‎2023-04-06 12:30 AM

the user knows which (MMC/SD) card is used in advance - because if there is a mmc socket, he only can plug in mmc , if there is a micro-sd slot, only sd card can put in.

and you should know , which kind of socket is in your hardware.

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