Microcontroller system having security circuitry to selectively lock portions of a program memory address space
US6505279B1 · kind B1 · utility
109Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A microcontroller system includes a security lock circuit to regulate access requests to contents of locations of a program memory. The regulation is selective, based on an operating mode of the security lock circuit, and also based on the source of the access request and the location of the program memory for which the access request is intended. Among other advantages, one major advantage provided by the security lock circuit is that concurrent programming (i.e., programming of one area of memory using instructions executing from another area of memory) can be initiated under predetermined secure conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.