| 摘要 |
PROBLEM TO BE SOLVED: To shorten a data rewrite time in an electronic control device.SOLUTION: A non-volatile memory in an electronic control device has secured a reserved region used when rewriting data including a program and a control constant written there. When rewriting data in the non-volatile memory, the electronic control device obtains differential data constituting at least a part of rewritten object data by communication (S6), generates new data by combining the rewritten object data stored in the non-volatile memory and the differential data, and writes the new data in the reserved region (S7).SELECTED DRAWING: Figure 6 |
