| 摘要 |
PURPOSE:To decrease the in-service (INS) processing time and also to relieve the processing load to the software by applying copy of a holding memory by means of the hardware. CONSTITUTION:When the content of a holding memory MEM0 is copied to other holding memory MEM1, a selector SEL0 is selected to the position ''0''. A selector SEL1 is selected from the position ''1'' to the ''0'' and a holding memory control circuit CTL1 is switched from the read mode to the write mode. Then the holding memory control circuit CTL1 and a counter CNT1 are activated by a clock signal CLK0 and a frame signal FRM0 through a delay circuit DL1, and the holding memory MEM1 is written by a sequential address from the counter CNT1 and a memory write signal from the holding memory control circuit CTL1. That is, the holding memories MEM0, MEM1, the holding memory control circuits CTL0, CTL1 and the counters CNT0, CNT1 are operated synchronizingly completely by the clock signal CLK0 and the frame signal FRM0, and the read from the one holding memory MEM0 and the write to the other holding memory MEM1 are performed at the same time.
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