| 摘要 |
<P>PROBLEM TO BE SOLVED: To create history information showing in what manner a system is being operated during abnormality in a device without separately providing a CPU. <P>SOLUTION: A CPU 101 writes information preliminarily written in an internal register of each unit to a Back Up SRAM 105 on switching the operation mode of the image processor 1 between a general operation mode and an energy-saving mode. As a result, even if abnormality is caused in the processor 1, register information showing the operating state just before can be read and used to analyze the cause of the abnormality since the information is stored in the Back Up SRAM 105. <P>COPYRIGHT: (C)2008,JPO&INPIT |
