| 摘要 |
<p>PURPOSE:To realize the transfer of data among the central processing circuits without affecting the process of each central processing circuit by transferring the contents of data on a writing action area received from the central processing circuits set opposite to each other within a dual port memory to the same address area of another dual port memory. CONSTITUTION:When a central processing circuit 1 transfers data to other central processing circuits 2 and 3, the data are written into the read/write area in a dual port memory 10. The dual port memories 10 - 30 are connected in common to each other via an external address bus 102 and an external data bus 101. Then the data are transferred with the external read control signals 113 - 133 and the external write control signals 114 - 134 from the data transfer control circuit 100. As a result, the circuits 1 - 3 own the same data and each of these circuits requires no special process for transfer of the data. Thus it is possible to minimize the influence of the transfer of data to the normal process of each central processing circuit and to carry out the transfer of data among the central processing circuits.</p> |
