Integrated circuit having configurable cells and a secured test mode
US7568140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jun 2, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31719
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic circuit includes a plurality of configurable cells configured by a control circuit such as a test access controller when it receives a mode command signal: either in a functional state in which the configurable cells are functionally linked to logic cells with which they co-operate to form at least one logic circuit if the mode command signal is in a first state or in a chained state in which the configurable cells are functionally connected in a chain to form a shift register, if the mode command signal is in a second state. The electronic circuit also includes a detection circuit laid out to produce an active state signal if it detects a chained state of the configurable cells while the controller receives the mode command signal in the first state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.