Electronic apparatus having voltage drop management mechanism and voltage drop management method

Abstract

A voltage drop management method that includes steps outlined below. One of node voltages of a functional circuit block is detected to drop below a threshold value to generate a voltage drop signal. A voltage drop event is determined to occur and is record in a system state. Circuit signals are analyzed according to the system state to select a candidate signal related to the voltage drop event and a signal variation pattern thereof is recorded. A verification process is performed on the signal variation pattern and the occurrence of the voltage drop event to generate prediction reliability. The candidate signal having the prediction reliability within a reliable range is set to be a target signal. A predicted voltage drop signal is generated according to the target signal having the signal variation pattern to drive a power management circuit to perform a voltage stabilizing process on a target circuit.

Images