Intelligence is achieved by Panasonic’s in-house developed SD Controller. As NAND flash die shrink takes place, reliability such as write endurance, data retention, read disturbance, and program time degrades. Panasonic SD controller, which has been established through various automotive applications, offers reliability and smart functions. To retain reliability, avoiding intensive write by static wear leveling becomes critical. Improving retention, achieving faster transfer speed is also dependent on the controller. Finally, protection and recovery process from power fail becomes very important to secure customer’s data.