Method and control apparatus for generating power management sig

Details Method and control apparatus for generating power management sig Method and control apparatus for generating power management sig

1994-08-01

1996-12-17

Harvey, Jack B.

G06F 1300

Patent

active

055863337

ABSTRACT:
There is disclosed a power management signal generated from a computer for saving power of computer peripheral equipment by alternatively controlling a power supply or an operating state of the computer peripheral equipment, corresponding to a use state of a computer system, which the computer system has the computer peripheral equipment performing any one power management state among an on state, stand-by state, suspend state and off state. For generation of the power management signal, the power management state is checked every time a timer interrupt signal is generated, and the present power management state is maintained unchanged if the present power management state is the off state, and if the present power management state is not the off state, it is checked whether or not a count time value counted becomes a determined value after counting the count time value for counting the time lapse as much as the predetermined time unit, and then the present power management state is maintained as it is if the count time value is not the determined value, or the present power management state is changed to next power management state if the count time value becomes the determined value. Also the present power management state is determined as on state each time there is a signal inputted from an input device, and then the count time value is set according to a predetermined stand-by time value.

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