System-on-chip and debugging method thereof

PURPOSE: A system on chip and debugging method therefor is provided to improve the reliability of a system on chip by providing a debugging means for the power control circuit of the system on chip. CONSTITUTION: A system on chip includes a core(120), power area blocks(141-14n), a power control circuit(160), and input and output interface(150). The power control circuit controls power in which is provided to the core and the power are blocks. The power control circuit includes a debugging circuit and is debugged through a debugging circuit. The debug circuit and the input and output interface communicates with outside through an input and an output pin, and shares information with the input and output pin.