ALARM CIRCUIT

摘要

An alarm circuit includes an audio chip, a basic input and output system (BIOS), a platform controller hub (PCH), and a speaker unit. The audio chip is electrically coupled to the BIOS, the PCH, and the speaker unit. The audio chip receives control signals from the BIOS and the PCH, and controls the speaker unit to alarm according to the control signals.

主权项

1. An alarm circuit comprising:
a platform controller hub configured to send a first control signal when a computer works abnormally; a basic input and output system configured to send a second control signal; an audio chip comprising an input pin coupled to the platform controller hub, an enable pin coupled to the basic input and output system, a first output pin, and a second output pin; and a speaker unit comprising a first data pin coupled to the first output pin, and a second data pin coupled to the second output pin; wherein the audio chip is configured to receive the second control signal from the basic input and output system and the audio chip works, the audio chip is further configured to receive the first control signal from the platform controller hub and control the speaker unit to emit and audio alert in accordance with the control signals.