Method and apparatus for the protection of non-volatile memory zones
US5812446A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C8/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to integrated circuits and methods in which it is desired to implement a partition of a memory between a protected zone and a non-protected zone, the dimensions of the protected zone being defined by a customer of the memory. A disclosed method avoids the use of special instructions to define these dimensions. The method includes writing sensitive information elements by starting at an address ADP, and ending at an address ADFM dictated by the circuit. The writing in the address ADFM automatically triggers a sequence for storing, in a non-volatile register RV, the first written address, and a sequence for the activation of a system for the protection of the zone between the addresses ADP and ADFM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.