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Linux/66AK2G12: U-Boot: SD Card boot Chip Detect

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Part Number:66AK2G12

Tool/software: Linux

Hello,

My company is working on the production PCB layout for a new design using the K2G.  We had initially hoped to use the GPMC NAND interface, but discovered that was not supported.  We are now trying to use the SD interface; however, we are using every MCASP0 pin and this conflicts with SD/MMC0 Card Detect line. 

In the TRM, table 11-1877 states that the card detect input signal is optional and depends on the system integration and type of connector housing that accomodates the card.

We know that not using the card detect line would make us unable to tell if the card has been inserted or removed, but since this will be the boot media and filesystem storage for the system, we are not worried about a hot-swap condition.

Is the Card Detect line optional for SD Boot (ROM Bootloader AND U-Boot) on MMC/SD Peripheral Zero, and are there any special considerations we need to be aware of?

Thank you,

Jeff


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