Table 26-29: Get eMMC EXT CSD Task Register Register Field Register Offset Bits Value Set block size to desired value. reg_blocksize xfer_blocksize 0x04 11:0 Block size value Set up ADMA2 descriptor table (see Table: Setup ADMA2 Descriptor Table). Data cache invalidate range. Set transfer mode with data direction and DMA enable. reg_transfermode xfermode_dmaenable | xfermode_dataxferdir 0x0C 4 and 1 0x11