| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely store data in an external storage medium even when a power switch is turned off before data is completely transferred to the external storage medium. <P>SOLUTION: A battery power source 28 is provided in a processor unit 12A together with an AC-DC power source 27. A power source monitoring and switching circuit 29 switching the power source of a sub CPU 26, an internal memory 19, and the external storage medium 24 between the AC-DC power source 27 and the battery power source 28 is provided. The power source monitoring and switching circuit 29 detects that the AC-DC power source 27 has been turned off and selects the battery power source 28 as a power source. Data temporarily stored in the internal memory 19 is transferred to the external storage medium 24 by driving the sub CPU 26 by electric power from the battery power source 28. <P>COPYRIGHT: (C)2012,JPO&INPIT |
