| 摘要 |
PURPOSE:To avoid failure in an operation processing, by fetching an input data before a sequence operation processing, storing it and renewing outputted data just after the end of the sequence operation processing. CONSTITUTION:An input processing section 11 of an operation device 1 fetches a data on a common data bus 2 to an input storage area 11B. On the other hand, an input data storage section 14 makes processing in synchronizing with an operation processing section 13 and transfers a data stored in an area 11B to an input data storage area 14B before the processing section 13 makes processing. When this transfer is finished, the processing section 13 picks up a data stored in the area 14B, makes sequence operation and the result is stored in an output data storage area 15B. When this operation processing is finished, an output data storage section 15 transfers the data stored in the area 15B to an output data storage area 12B. When this transfer is finished, an output processing section 12 outputs the data stored in the area 12B to a bus 2 in asynchronizing with the processing section 13. |
