AW_MMC_BWDR
AW_MMC_WRITE_4(sc, AW_MMC_BWDR, AW_MMC_BWDR1);
AW_MMC_WRITE_4(sc, AW_MMC_BWDR, AW_MMC_BWDR4);
AW_MMC_WRITE_4(sc, AW_MMC_BWDR, AW_MMC_BWDR8);