Patent ID: 6240520
Filing Date: 2001-05-29
Classification: G06F

Abstract:
A power on/off control device for computer, having a first power supply means for outputting predetermined first electric power upon receiving input power and a second power supply means for outputting main electric power to operate the computer being on power-on, which is turned on and off according to power driving signals of a first level or a second level, comprising:a power switch for outputting a first level while the power switch is being pressed down, and a second level while not pressed down;a power driving signal output means for outputting a power driving signal of the first level or of the second level alternatively according to pulse signals inputted from a microprocessor;said microprocessor, having a first port connected with the power switch and a second port coupled with the power driving signal output means, for controlling power on/off according to signal levels from the first port and the second port;a data output means for forwarding data outputted from the microprocessor to a system data bus; anda data input means for sending data inputted through the system data bus to the microprocessor,the microprocessor detects on/off status of computer according to signal levels inputted through the second port and outputs pulse signals to the power driving output means according to the signal levels from the power switch and command data from the data input means.