DECODER, METHOD OF OPERATING THE SAME, AND APPARATUSES HAVING THE SAME

PURPOSE: A decoder, an operating method thereof, and apparatuses having the same are provided to prevent power consumption by controlling a frequency of a clock signal provided to a chien search block according to information about the highest degree term of an error locator polynomial. CONSTITUTION: A frequency control logic(62) determines a frequency of a clock signal for being generated from a clock oscillator. The frequency control logic generates frequency information, in other word, information for the frequency of the clock signal generated from the clock oscillator. An oscillator trimming logic(64) receives the frequency information outputted from the frequency control logic. The oscillator trimming logic generates a control signal for controlling the operation of the clock oscillator according to the frequency information received. A frequency DB(66) stores the information about the number of errors and the information about the frequency of the clock signal in a frequency mapping table.