Hi,
If you want to save the data at run time use the simple files. All the user data can be easily saved to nand using FileSystem support. If you are looking to save some data at some predefined addres, you can refer the partition structure or FS structure of the AM335X FS. Here You will get the idea of NAND memory utilization and Organization. Also you can use nand read write utilities to write to the predefined memory location.
Please elaborate your exact requirement.
