MICROPROCESSOR AND DYNAMIC RAM SYSTEM WITH SOFTWARE REFRESHING AND APPLICATION TO A DISTURBANCE RECORDER

摘要

-10-ABSTRACT OF THE DISCLOSUREThe invention relates to data processing systemsusing one or more microprocessors having access to adynamic RAM. During access to the ROM, the addressesof the steps of the program stored in the ROM, outputtedby the ordinal counter of the microprocessing, are usedfor forming the addresses of the rows of the RAM to berefreshed This latter is thus refreshed regularly bythe software of the system. Control of the memory isprovided by a sequencer, itself controlled by a clockgenerator and the microprocessor. A multiplexer is usedfor addressing the RAM.