BUS CONTROLLER FOR MULTIPROCESSOR

摘要

PURPOSE:To properly execute data processing by means of a master processor by restricting the access time of a main memory by a processor except a master processor. CONSTITUTION:A master/slave constitution is composed of a main processing unit 1 including the master processor and a sub-processing unit 2 including a slave processor, and the sub-processing unit 2 transmits various control signals to an external processor 15 provided to a peripheral unit 3 through a control bus. Then when the processor except the master processor requests an access to the main memory 4, the master processor is made to be an operation stopping state and restricts the time for delivering an access right to the other processor within the prescribed time. Thus the utilization time of the main memory can be efficiently managed and the operation by the multiprocessor constitution can be accelerated.