| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit that receives no noise signal in mistake, even under a multi-noise environment or in a state where noise tends to be produced in synchronism with the sampling period. <P>SOLUTION: The semiconductor integrated circuit includes a sampling section a delay section, a first arithmetic section, and a second arithmetic section. The sampling section samples an input signal received externally synchronously with a clock signal and outputs the sampled signal as a first signal. The delay section delays the first signal, on the basis of the clock signal and outputs the result as a second signal. The first arithmetic section calculates whether the level of the input signal lasts for a prescribed time or over, on the basis of the first and the second signals. When the signal level continues for the prescribed time or over, the first arithmetic section outputs an output signal with a signal level consecutive for a prescribed time or over synchronously with the clock signal. The second arithmetic section asynchronously controls the sampling section, on the basis of the input signal and the output signal. <P>COPYRIGHT: (C)2007,JPO&INPIT |
