Voltage detector device having trimming mechanism and voltage detection method

A voltage detector device, comprising:

• a reference voltage selection circuit, outputting a corresponding one of a plurality of first voltages to be an input voltage according to a clock signal, a first detection signal, a reset signal and a plurality of first bits, wherein the first voltages are generated based on a power supply voltage;
• a reset signal generation circuit, generating the reset signal according to the clock signal and a plurality of currents, wherein the currents are generated based on the power supply voltage;
• a voltage detector, comparing the input voltage with a reference voltage to generate a second detection signal, and generating the first detection signal according to the second detection signal and an enable signal;
• and
• a digital circuit, adjusting the first bits according to the second detection signal to determine values of the first bits during a trimming phase, and outputting the first bits and selectively reset according to the first detection signal during a voltage detection phase.