Patent · US Expired

Circuit configuration and method for authenticating the content of a memory area

US6708890B2 · kind B2 · utility

0Cited by

7References

3Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Markus Gail · Munich, DE
Wolfgang Pockrandt · Pfaffenhofen an der Ilm, DE
Armin Wedel · Mering, DE
Erwin Hess · Ottobrunn, DE

Key dates

Filing date	Mar 30, 2001
Grant date	Mar 23, 2004
Priority date	—
Expiry date	Nov 14, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG11C16/102
WIPO fieldControl
WIPO sectorInstruments

Abstract

A circuit configuration includes at least one nonvolatile, electrically erasable and writable memory area. Each memory area is assigned a nonvolatile, electrically writable and erasable flag memory, which is connected through an address line, a programming line and an authentication line to the assigned memory area, a programming voltage source and a data verification circuit. In the event of an alteration in the content of a memory area, the state of the associated flag memory is changed and, after verification of the programmed memory area content, the flag memory is returned to its basic state.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.