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DM3730 SDIO/MMC Interface Layout Guide?

Hi~~!!

My processor is DM3730CBP.

I use SDIO/MMC2(8bits) for eMMC, and SDIO/MMC1(4bits) for SD-Card.

May I ask

What is the maximum length of these SDIO/MMC trace?

Is it need impedance matching?

Is it need equal length of these trace?

Why pull high resistor need to close to device not processor?

Thanks!!!