| 摘要 |
PURPOSE:To improve a use efficiency of a memory element of a large capacity and to make a memory access highly speedy by installing plural shared/local memories, etc., and placing a shared memory part and a local memory part onto the same memory bank. CONSTITUTION:When a processor 1 issues a writing memory access request, an access deciding circuit 11 refers to the address information, and in case of an access for a local memory area, the data are written in a shared/local memory 9. In case of the access for a shared memory area, the circuit 11 writes the data in the memory 9, and simultaneously, sends a shared memory area writing request signal and the data through a communicating bus 15 to an access deciding circuit 12. The circuit 12 writes the data to a shared/local memory 10 and sends to a completing signal to the circuit 11. Thus, since the shared memory part and the local memory part can be placed on the same memory bank, the memory element of a large capacity can be used with a good efficiency and the memory access can be made highly speedy. |
