| 摘要 |
PURPOSE:To improve processing efficiency by changing the bus use ratios of plural controllers in accordance with the contents of processings. CONSTITUTION:A main processor 14 executes a program on a memory 16 and starts a bus-processor 11 if need be. If the processing of the main processor 14 needs to be taken precedence in such a case, the set value of a delay time setting circuit 15, namely, a delay time is set to maximum before the sub- processor 11 is started. If the processing of the sub-processor 11 needs to be executed at the highest speed on the other hand, the set value of the delay time setting circuit 15 is set to '0' before the sub-processor 11 is started and the processing is executed. |
