Apparatus and method for protecting data stored in memory

Details Apparatus and method for protecting data stored in memory Apparatus and method for protecting data stored in memory

1992-07-14

1995-07-04

Harvey, Jack B.

Boots, shoes, and leggings

395575, 395425, 364422, G06F 130

Patent

active

054308828

ABSTRACT:
An apparatus and method provide data security for battery backed memory during power up and power down. A reversing sequential power up and power down process is used to control the write process for the memory during the operating voltage transitions of power up and power down. The apparatus is combined in a housing with a microprocessor and a memory to provide an instrument for an oil or gas well.

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patent: 4611289 (1986-09-01), Coppola
patent: 4827149 (1989-05-01), Yabe
patent: 5175845 (1992-12-01), Little

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