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5509A--SDHC卡SPI模式的读写

daozhang song
Prodigy 10 points


5509A--SDHC卡SPI模式的读写,  有没有相关的程序根历程啊 ！我弄了半个月都没弄好!!!那个SPI模式是怎么配置呢？？DAT3的片选怎么实现？？？？求帮忙！！有相关方面资料的给我发一个！！我的邮箱adao3056@126.com   万分感谢 ！！！！

  • 0
    TI__Guru 64206 points

    请问你是要用SPI模式，还是要读写SDHC卡？C5509A的SD接口不支持SPI协议。

    1.1 Overview
    The MMC controller includes:
    Support for a MultiMediaCard (MMC) or a Secure Digital Memory Card
    (SD card)
    A programmable frequency for the operation of the MMC controller
    A programmable frequency for the clock that controls the timing of
    transfers between the MMC controller and the memory card
    The MMC controller does not support the SPI protocol. It cannot communicate
    with a memory card that is in its SPI mode.