Scan and boundary scan disable mechanism on secure device
US7228440B1 · kind B1 · utility
16Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2002 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Mar 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318591
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit generally comprising a logic module and a security module is disclosed. The logic module may be configured to set a plurality of values to a plurality of predetermined values respectively while in a scan mode. The security module may be configured to (i) disable a scan capability of the values while in a non-lowest security mode of at least three security modes and (ii) enabling the scan capability while in a lowest security mode of the security modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.