Configuration setting circuit and configuration setting method thereof

A configuration setting circuit for setting the configuration of an integrated circuit, the configuration setting circuit comprising:

• a clock generator, for generating a plurality of clock signals, wherein the frequencies of the plurality of clock signals are different;
• a plurality of output terminals, coupled to the clock generator, for respectively outputting the plurality of clock signals;
• a first input terminal, for receiving a first input signal, wherein the first input signal is one of the plurality of clock signals;
• and
• a first frequency detector, coupled to the first input terminal, for detecting the frequency of the first input signal to generate a first configuration data;
• wherein the first configuration data is an at least two-bit configuration data.