| 摘要 |
PURPOSE:To prevent easily the memory access conflict between processors by securing such a system where a processor at one side performs an access to a memory device after stopping the actuation of a processor at the other side. CONSTITUTION:When a processor A given an access to a memory device 33, an action stop indicating signal 38a is sent to a processor B in case an action stop indicating signal 38b is not given from a control circuit 34. Then the processor A confirms a stop state by an answer signal 39a and a busy signal 40a given from the processor B and executes a memory access 41a. When the processor B gives an access to the device 33, the processor B decides an idle state of the device 33 when the action stop indicating signals 38a and 38c are not given from the processor A and the circuit 34 respectively and then executes a memory access 41b. Thus the access conflict can be completely prevented with a simple constitution. |
