Apparatus and method for protecting data stored in memory
US5430882A · kind A · utility
10Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1992 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Jul 14, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.