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nand flash读到的ID与datasheet中不一样!

chengyuan ma
Intellectual 291 points


我所用nand的型号与id在附件中，但是我读到的是C010203，请问这个可能是什么原因造成的？

而且这个读到的ID是不是每一位有什么含义啊？

谢谢您的解答

  • 0
    TI__Guru**** 357097 points

    看一下下面的wiki网站说明，可以更好地理解ID的含义。

    http://processors.wiki.ti.com/index.php/Determining_compatibility_between_ROM_Bootloader_(RBL)_and_Raw_NAND_devices#Methods_used_by_NAND_manufacturers

  • 0 回复 Shine
    Intellectual 291 points

    非常感谢！！！

    还有就是在做擦写操作的时候，下面的ALE是怎么算出来的？

    NANDFLASH_CLE = CMD_ERASE;
    NANDFLASH_ALE = (blocknum & 0x0003) << 6;
    NANDFLASH_ALE = (blocknum & 0x03fc) >> 2;
    NANDFLASH_ALE = (blocknum & 0x0c00) >> 10;

    NANDFLASH_CLE = CMD_ERASE_CONFIRM;

    NANDFLASH_CLE = CMD_PROGRAM;
    NANDFLASH_ALE = 0x00;
    NANDFLASH_ALE = 0x00;
    NANDFLASH_ALE = pagenum & 0xff;
    NANDFLASH_ALE = (pagenum & 0x00ff00) >> 8;
    NANDFLASH_ALE = (pagenum & 0x030000) >> 16;