Hybrid test compression architecture using multiple codecs for low pin count and high compression devices
US8527821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2010 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Apr 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/263
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention uses multiple codecs to efficiently achieve the right balance between compression and coverage for a given design. This application illustrates a simple example using two codecs including a high compression codec and a low compression codec. The test engineer generates a first set of test patterns using the high compression codec. If this high compression results in unacceptable fault coverage loss, the top-up patterns for additional coverage are generated using the low compression codec. The invention may use multiple codecs serially one after the other. The codecs can be of different types or parameters (such as compression ratio, debug tolerance and combinational codec versus sequential codec).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.