Scan chain partition for reducing power in shift mode
US7406639B2 · kind B2 · utility
3Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2004 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Aug 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318575
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A scan chain partition includes a serial input coupled to a scan input signal pin of a module under test. A plurality of scan sub-chains is coupled to the serial input. A scan sub-chain output multiplexer is coupled to the plurality of scan sub-chains for sequentially selecting only one of the scan sub-chains in response to a scan sub-chain control signal. A scan sub-chain controller generates the scan sub-chain control signal and gates a scan clock signal to only a scan clock input of the selected scan sub-chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.