| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the generation of hazard in switching a clock signal, and to arbitrarily set a timing of switching a clock signal. <P>SOLUTION: Setting signals for setting the periods of stopping the output of a first clock signal and a second clock signal are generated from a clock selection signal for selecting a clock signal and a reference clock signal, and when the first clock signal is switched to the second clock signal based on these setting signals, a period to inhibit output of the clock signal is set. <P>COPYRIGHT: (C)2008,JPO&INPIT |
