| 摘要 |
<p>PURPOSE:To eliminate useless data writing operation and to shorten the final writing process of a preset data by confirming the preset data stored in a nonvolative memory and performing the rewriting operation in the nonvolative memory only when the rewriting operation of the preset data is necessary. CONSTITUTION:A nonvolative memory reading means 3 is provided to read out the preset data already stored in an inside nonvolative memory 10 corresponding to the preset data to be recorded for each preset data to be recorded. A decision means 4 deciding whether the values of both preset data are the same or not, and a memory rewriting means 5 rewriting the storage contents by the preset data to be recorded only when the unmatch of the both preset data values is decided. For example, this preset data writing controller is constructed by a software means in a CPU directly controlling the inside nonvolative memory. Thus, the data rewriting in the final writing process of the preset data can be kept to an irreducible minimum.</p> |
