PURPOSE: To surely reset a circuit applying reset by holding the reset signal and releasing the reset signal stored at a point of time when reset is applied to a circuit to be reset.

CONSTITUTION: With a reset signal Reset given to an RS flip-flop 2, a noninverting input of the RS flip-flop 2 goes to a high level, then the output of an inverter 3 goes to a low level and each T flip-flop of a counter 4 is reset. Then all bits of the counter 4 go to a low level, and all the flip-flops of the counter 4 is reset. The output of a NOR gate 1 goes to a high level and the RS flip-flop 2 is reset and the stored reset signal Reset is released. Thus, the circuit to be reset is surely reset.