| 摘要 |
PURPOSE:To prevent an access competition, and also, to reduce an overhead of a processor by constituting the circuit so that an access by one of two sets of processors is allowed, whenever the other, processor ends an access of one cycle. CONSTITUTION:Two processors are supplied to a memory shared controlling circuit 3 through the respective buses, and the controlling circuit concerned 3 is provided with gate switches 31, 32 for coupling each bus of control, address and data between a memory 4 and the processors 1, 2. When one processor starts write or read-out, the other processor is brought to a pause, and when it is ended, flip-flops 37, 38 are reset, and also, the processor itself is brought to a pause by the time which is set to monostable multivibrators 315, 316, and when a control signal of the other processor is generated during that time, the pause is continued. |
