Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1997-06-11
1999-07-27
Robertson, David L.
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
39518204, 365229, 711162, G06F 1300
Patent
active
059308168
ABSTRACT:
A memory back-up apparatus and method and an audio and/or video data recording and reproducing apparatus with which the loss of significant data is prevented where an abnormality occurs in the apparatus. The significant data to be backed up is copied to a SRAM from an external RAM. Where writing occurs in the significant data before completion of the copying, the copying is tried again from the first. Further, periodically, the data is copied from the SRAM to the other SRAM via the data. At the restart processing, the power supply status signal of a voltage detection device is inspected, and where the battery is consumed, the data backed up to a nonvolatile memory is copied to an original address of an external RAM, and where it is not consumed, the data stored in the SRAM is copied to the original address of the external RAM.
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Frommer William S.
Robertson David L.
Sony Corporation
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