Electric power measurement circuit

An electric power measurement circuit that calculates power consumption in an integrated circuit including a plurality of processing circuits, the electric power measurement circuit comprising:

• a period measurement circuit that measures a measurement period;
• a first measurer that measures, in the measurement period, (i) a first toggle number that is a number by which a signal value indicated by a first input signal to a first target circuit among the plurality of processing circuits has changed and (ii) a first operation period that is a period during which the first input signal is valid;
• a second measurer that measures, in the measurement period, (i) a second toggle number that is a number by which a signal value indicated by a first output signal from the first target circuit has changed and (ii) a second operation period that is a period during which the first output signal is valid;
• and
• a calculator that calculates a first power consumption of the first target circuit based on the first toggle number and the first operation period measured in the measurement period by the first measurer and the second toggle number and the second operation period measured in the measurement period by the second measurer.