| 摘要 |
PURPOSE:To surely remove a noise pulse loaded on a clock signal without generating any delay at the clock input part of a microcomputer. CONSTITUTION:The clock signal is inputted to an edge detection part 102 controlled so as to detect only one of rise and fall edge signals corresponding to a control signal from an edge detection control part 105 and when the selected edge signal is generated, the edge detection part 102 inverts an output 103. Afterwards, the output is not changed until the control signal is inverted. After the lapse of fixed time from the inversion of the output, a timing generation part 104 generates a signal meaning control signal inversion timing to the edge detection control part 105. Then, the edge detection part 102 reacts to the edge signal in the opposite direction. |
