Freescale的MQX操作系统增加yaffs2文件系统，支持NAND Flash的接口移植源码及移植接口说明文档，在K70平台验证按移植说明操作后可正常工作，供开发参考使用。(Freescale's MQX operation system adds yaffs2 file system, supports NAND Flash's interface transplant source code and transplant interface descr iption document. It can work normally on K70 platform after transplant, and can be used for development reference.)