Integrated structure microcomputer provided with non-volatile RAM memory
US4638465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1984 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Jan 31, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An integrated structure composed of a processing unit (CPU), ROM memory, RAM memory and other optional functions, such as input/output etc., is arranged as a microcomputer, in which all or part of the RAM is a non-volatile memory which carries out during normal operation all the functions of a RAM while also being able, through suitable circuit structures, to store in a permanent (non-volatile) way the data contained therein, retaining the data when the power feed to the circuit is cut off, and recalling the same data at power turn-on. The structure provides for the handling of the non-volatile memory in its different functions, and its arrangement and compatibility with the processing unit, through suitable circuitry and control signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.