A computer automatic boot circuit

Abstract

The invention discloses an automatic startup circuit for a computer, which is used to automatically turn on the computer, including a south bridge chip, a super input and output chip connected with the south bridge chip, a first electronic switch, a second electronic switch, a first capacitor , a first resistor, a second resistor and a third resistor; the first electronic switch and the second electronic switch respectively comprise a first terminal, a second terminal and a third terminal; the third terminal of the first electronic switch passes through the first capacitor Connect the reset signal end RSMRST# of the south bridge chip, the first end connects the reset signal end RSMRST# of the south bridge chip through the delay module, and the second end connects the first end of the second electronic switch through the first resistor; The second terminal of the electronic switch is grounded, and the third terminal is respectively connected to the power-on trigger signal terminal FP_PWRBTN# of the super input and output chip, and connected to the standby power supply of the computer through the third resistor. The realization mode of the computer automatic booting circuit of the present invention is an all-hardware structure, and the circuit structure is simple and the cost is low.

Description

technical field [0001] The present invention relates to an automatic start-up circuit, and more specifically relates to a computer automatic start-up circuit which can be used to restart the computer system after the computer system is powered on again. Background technique [0002] Computers are more and more widely used in people's lives, such as personal computers and industrial computers. During the operation of the computer system, if the mains power failure occurs, the computer is shut down. When the mains power comes back on, it is often required that the computer can be turned on immediately to resume work. The general practice of computer motherboards at this stage is that the super input and output chip provides hardware circuit control, and the BIOS provides software control. For example, the BIOS needs to set the AC POWER FAIL function to POWER ON, so that it will automatically turn on every time the mains power comes on. However, the above method needs to be co...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a computer automatic boot circuit with simple circuit structure only through hardware circuits in view of the defects in the prior art that hardware and software jointly control the automatic boot of the computer and that the software boot program is complicated.

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