Patent ID: 7397271
Filing Date: 2008-07-08
Classification: H03K

Abstract:
1. A semiconductor integrated circuit device comprising: a combinational logic circuit including one or plural logic cells connected in series, wherein at least one of the logic cells includes a first flip-flop circuit including a data input terminal to which an output signal of the combinational logic circuit is inputted and a clock input terminal to which a clock signal is inputted; a second flip-flop circuit to which a clock control signal controlling whether the clock signal is supplied is inputted, the second flip-flop circuit outputting the clock control signal as an output signal in synchronization with a system clock signal; an OR circuit to which the output signal of the second flip-flop circuit and the system clock signal are inputted, the OR circuit outputting the clock signal; and an inverter circuit to which the output signal of the second flip-flop circuit is inputted, the inverter circuit outputting a signal obtained by inverting the inputted signal as the circuit control signal.