As NAND flash continues to increase in density and decrease in cost per gigabyte, it has enabled more cost-effective storage. This benefits a wide (and constantly growing) range of digital consumer products. Selecting the most appropriate high performance NAND architecture for any given application is of increasing importance as the ECC requirements for NAND continue to increase. This paper will explore the attributes of and differences between-MMC and NAND with built-in ECC (such as Toshiba’s SmartNAND) and go into detail about the applications that are best suited for each.