AND Flash 在嵌入式系统中的地位与PC机上的硬盘是类似的。用于保存系统运行所必需的操作系统，应用程序，用户数据，运行过程中产生的各类数据，系统掉电后数据不会护丢失.本文主要介绍关于NAND Flash的组织结构和编写程序的方法。-The status of Flash AND in the embedded system is similar to the hard disk on the PC.. Operating system to save the system required, application, user data, generated during the operation of various types of data. The system is out of power data will not protect the loss. This paper mainly introduces the NAND flash on the organizational structure and programming method.