| 摘要 |
PURPOSE:To eliminate a noise and to decide an arrival signal by sampling odd times a signal which has arrived at a port of a microcomputer, and deciding it by a majority. CONSTITUTION:In one chip microcomputers CPU1, CPU2, sampling groups SP1-SP5 are formed by sampling an arrival data, for instance, five times each. Subsequently, 'H' and 'L' are determined by a decision by majority of the sampling groups SP1-SP5, also 'H' and 'L' are determined by a decision by majority of the generation frequency of 'H' and 'L', and an arrival signal is determined. |
