Power supply control apparatus and power supply control method

A power supply control method for use in an electronic device that runs a particular shutdown process when the power supply of the electronic device turns off comprising

• detecting an operation that turns the power supply to the electronic device on or off;
• continuing to supply power to the electronic device until a specified time has elapsed or until the output voltage of the power supply drops to a predetermined reset voltage in response to when an operation turning the device power supply off is detected;
• and
• outputting a command to reset and restart the electronic device if an operation turning the device power supply on is detected during the time period from when an operation turning the device power supply off is detected to when said specified time has been reached or when the power supply reset voltage is reached.

A power supply control apparatus for controlling the operation of a power supply in an electronic device that runs a program for shutdown and/or start up when the power supply in the device turns on or off, comprising:

• means for detecting when the power supply of the electronic device is turned on or off;
• means responsive to when said on/off operation detection circuit detects turn off of said power supply for causing said power supply to continue to supply power to the electronic device for a specified time or until said power supply output drops to a predetermined power supply reset voltage;
• and
• means responsive to said power maintenance circuit for asserting a command to reset and restart the electronic device if said on/off operation detects the power supply being turned on during the interval of time following detection of turn off of the power supply to the electronic device to detection of when said predetermined reset voltage is reached.