Circuit protection system and method

摘要

A circuit protection system for an electronic system includes a platform control hub (PCH), a PCH power chip connected to the PCH, a basic input output system (BIOS), a control unit, and a power supply. The control unit determines the potential of a PW_OK signal from the PCH power chip to get the current state of the electronic system through the BIOS, thereby determining whether the current status of the PW_OK signal corresponds to a predetermined status of the PCH power chip which is defined in the current state of the electronic system. If the current status of the PW_OK signal does not correspond to the predetermined status, the control unit outputs a system PW_OK signal of low potential to disable the PCH power chip, and outputs an enable signal to the PCH which outputs a PS_ON signal of high potential to the power supply to shutdown the electronic system.

主权项

1. A circuit protection system for an electronic system, the circuit protection system comprising:
a control unit; a platform control hub (PCH) connected to the control unit; a PCH power chip connected to the control unit and the PCH to power the PCH; a basic input output system (BIOS) connected to the control unit; and a power supply connected to the PCH; wherein the control unit determines the status of the potential of a PW_OK signal output from the PCH power chip, and gets the current state of the electronic system through the BIOS, thereby outputting an enable signal to disable the PCH power chip and outputting a system PW_OK signal to the PCH when the current status of the PW_OK signal of the PCH power chip does not correspond to a predetermined status for the PCH power chip defined in the current state of the electronic system, and the PCH outputs a PS_ON signal to the power supply to shut down the electronic system in response to receiving the system PW_OK signal.