DMAC_TXADRLO
dmac_write(host, DMAC_TXADRLO, address);
dmac_write(host, DMAC_TXADRLO, address);
dmac_write(host, DMAC_TXADRLO, 0);
dmac_write(host, DMAC_TXADRLO, transferred);
dmac_read(host, DMAC_TXADRLO);