Шаблон duplex для дле 9,2

Low-Speed SDIO cards are allowed to also support the four-bit SD bus; Full-Speed SDIO cards are required to support the four-bit SD bus. To use an SDIO card as a «combo card» (for both memory and I/O), the host device must first select four-bit SD bus operation. These card readers present a standard USB mass storage interface to memory cards, thus separating the operating system from the details of the underlying SD interface.

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