| 摘要 |
<p>PURPOSE:To continue refresh routines at the reclosing of a power source by performing refreshing according to the storage contents of the specific areas assigned to the refresh buffers and refresh address memories of ROMs. CONSTITUTION:The area of an address 0 of an MNMOS memory 3 is assigned to a refresh buffer memory, and a refresh address signal is stored therein. On the other hand, the area of an address F is assigned to a refresh address memory, and stores a refresh address and a refresh routine state. With this constitution if the F area routine state is read out by way of an I/O 10 at the reclosing of the power source, the instruction including jump operation in succession to the refresh routine cycle of readout, write-in, erasing, output and input modes is formed by the microcomputer 11 of a control circuit 2.</p> |
