Read-protected semiconductor program memory
US5377137A · kind A · utility
0Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Sep 8, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A read protected semi-conductor program memory that can be used for protection of read-only memories built in microhandler of microcomputers comprising a first program memory area intended for storing the program data and a second encryption memory area intended for storing encryption data. A logical operator in intercoupled with the program and encryption memory areas making thus possible, on simultaneous reading of the program and encryption memory areas, to obtain encrypted program data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.