| 摘要 |
<p>PURPOSE: To eliminate the occurrence of time loss due to connection with a CPU and to improve the data processing efficiency of the entire system. CONSTITUTION: Corresponding to a program stored in a program RAM 60, data are read from data RAMs 30-33, an arithmetic processing is executed and the arithmetic result is stored in the data RAMs 30-33. Also, at the time of replacing the data to be served for an arithmetic processing and the arithmetic result by DMA transfer between an external device and the data RAMs 30-33, a DMA instruction is provided along with an arithmetic instruction in the program stored in the program RAM 60 and the DMA transfer is directly activated without the CPU in the execution process of the program.</p> |
