Power supply and method for use in a computer system to confirm a save operation of the computer system and to stop a supply of power to the computer system after confirmation

摘要

A power supply for use in a computer system according to this invention has a one-chip microcomputer having a built-in A/D converter. The microcomputer, which has a communication function, performs a power off sequence for a computer system and a power off sequence for a hard disk drive built in the computer system, while communicating with the computer system. Further, the microcomputer detects the voltage and current of a chargeable battery, discriminates a low battery state, monitors a power switch, a hard disk drive switch and a reset switch, and monitors an input/output voltage.