DATA REWRITING SYSTEM, NEW VERSION DATA CREATION DEVICE, DIFFERENTIAL DATA CREATION DEVICE, NEW VERSION DATA CREATION PROGRAM AND DIFFERENTIAL DATA CREATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To implement high speed program compression on an embedded device having a low throughput about software updating.;SOLUTION: A differential data input part 220 receives differential data and compression rule information from a computer in a development environment for compressing new version data and creating compression state information representing rules of compression of the new version data when compressing the new version data. A data expansion part 230 reads in and expands in a RAM 210 compressed old version data 270 stored in a NAND flash memory 260. A differential application part 240 applies the differential data input into the differential data input part 220 to the expanded old version data 270 to create new version data (new expanded data 212). An embedded side compression part 250 compresses the new version data created by the differential application part 240 according to the compression state information input into the differential data input part 220, and stores the compressed new version data in the NAND flash memory 260.;COPYRIGHT: (C)2010,JPO&INPIT