Electronic circuit comprising a test mode secured by insertion of decoy data in the test chain, associated method
US7930605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2007 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Feb 15, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31719
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic circuit includes configurable cells each having a test input and an output. The configurable cells are connected to one another in a chain in a predefined order via their test input and their output to form a test register based on receiving a chaining command signal. The electronic circuit also includes a detection circuit activated by the chaining command signal to produce a state signal representing a state of initialization of a first set of configurable cells A multiplexing circuit selectively connects the test input of each configurable cell to a second set of the configurable cells either to the output of a preceding configurable cell or to an output of a decoy data generator based on the state signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.