| 摘要 |
<p>The present invention includes a plurality of input/output processors (72,74,76) communicating with a master processor (70). Each of the input/output processors has a filtering mechanism (128) to filter the inputs (B, C, D) before transmission to the master (70) over the communication channel (80) precluding the necessity of filtering at the master. More importantly, the shared communications sys- item is not loaded down with every change of an input. Because of this feature, only meaningful changes are put on the communication line, thus substantially reducing its load which makes its effective response time stay high. The inputs when received at the master can be immediately handled to improve the central processor response time. Two types of filtering are provided, in particular, transition and debounce filtering to respond to switch and sensor inputs. Also, there is provided a means to programmabty select the type of filter and the time period of filtering.</p> |
