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

An electronic system having a voltage drop management mechanism,

• comprising:
• a functional circuit block;
• a power management circuit;
• a plurality of voltage detectors configured to detect a plurality of node voltages of the functional circuit block to generate a voltage drop signal to the functional circuit block when any one of the node voltages drops to a threshold value, such that the functional circuit block determines an occurrence of a voltage drop event and document a system state;
• a voltage drop analysis circuit configured to perform analysis on a plurality of circuit signals transmitted by the functional circuit block according to the system state, to select one of the circuit signals related to the occurrence of the voltage drop event to be a candidate signal, document a signal variation pattern of the candidate signal corresponding to the voltage drop event and perform a verification process on the signal variation pattern of the candidate signal and the occurrence of the voltage drop event within a period of operation time of the functional circuit block to generate a prediction reliability of the candidate signal corresponding to the voltage drop event;
• and
• a voltage drop processing circuit configured to set the candidate signal having the prediction reliability within a reliable range to be a target signal so as to generate a predicted voltage drop signal according to the target signal having the signal variation pattern to drive the power management circuit to generate a power mode control signal to the functional circuit block to perform a voltage stabilizing process on a target circuit related to the target signal in the functional circuit block.