Electronic device and camera

An electronic device, comprising:

• an arithmetic circuit for controlling said electronic device;
• a first voltage detecting circuit for detecting that a power source voltage supplied to said arithmetic circuit drops below a first voltage value guaranteeing an operation of said arithmetic circuit at a first operating frequency;
• a second voltage detecting circuit for detecting that said power source voltage drops below a second voltage value guaranteeing an operation of said arithmetic circuit at a second operating frequency higher than said first operating frequency;
• an operating frequency changeover circuit for changing the operating frequency of said arithmetic circuit;
• and
• a reset circuit for resetting a program operation of said arithmetic circuit,
• wherein, if it is detected that said power source voltage drops below said second voltage value, said arithmetic circuit causes said operating frequency changeover circuit to change the operating frequency of said arithmetic circuit from said second operating frequency to said first operating frequency, and if it is detected that said power source voltage drops below said first voltage value, said reset circuit for resetting the program operation of said arithmetic circuit.

An electronic device, comprising:

• an arithmetic circuit for controlling said electronic device;
• a first voltage detecting circuit for detecting that a power source voltage supplied to said arithmetic circuit drops below a first voltage value guaranteeing an operation of said arithmetic circuit at a first operating frequency;
• a second voltage detecting circuit for detecting that said power source voltage drops below a second voltage value guaranteeing an operation of said arithmetic circuit at a second operating frequency higher than said first operating frequency;
• an operating frequency changeover circuit for changing the operating frequency of said arithmetic circuit;
• and
• a determination circuit for determining whether a processing operation that cannot be continued at said first operating frequency is being performed when the operating frequency of said arithmetic circuit is changed to said first operating frequency;
• wherein, if it is detected that said power source voltage drops below said second voltage value, said arithmetic circuit causes said operating frequency changeover circuit to change the operating frequency of said arithmetic circuit from said second operating frequency to said first operating frequency, and if said determination circuit determines that the processing operation that cannot be continued at said first operating frequency is being performed, said arithmetic circuit stops the processing operation being executed.