| 摘要 |
PROBLEM TO BE SOLVED: To provide a shared memory of constitution that eliminates the need to transfer data from the shared memory to a local memory and can improve a processing speed. SOLUTION: In the shared memory 3 used by an inter-CPU communication system which communicates with a plurality of CPUs while using the shared memory, a plurality of memory blocks 4-1 to 4-n are provided; and each memory block from 4-1 to 4-n is provided with a plurality of memory cells 5 and 6 to which each CPU 1 and 2 can perform random access separately. Then the shared memory is provided with a transfer control circuit 7 which enables data transfer between a plurality of memory cells 5 and 6 with transfer commands from each CPU.
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