Realization of huge data storage with MMC in environment parameter measuring system

Considering the difficulty of huge data storage in environment parameter system,a new storage method with MMC was presented.The principle and SPI protocol of MMC were discussed in this paper,hardware interface between AT89S53 and MMC was designed,realization of software of data storage based on self defining file system was discussed as well.The method is effective to solution to the difficult question in application.