IEEE Transactions on Computers - Special issue on fault-tolerant computing
Proceedings of the conference on Design, automation and test in Europe
Test volume and application time reduction through scan chain concealment
Proceedings of the 38th annual Design Automation Conference
Tailoring ATPG for embedded testing
Proceedings of the IEEE International Test Conference 2001
Scan chain design for test time reduction in core-based ICs
ITC '98 Proceedings of the 1998 IEEE International Test Conference
A novel test methodology for core-based system LSIs and a testing time minimization problem
ITC '98 Proceedings of the 1998 IEEE International Test Conference
Test vector decompression via cyclical scan chains and its application to testing core-based designs
ITC '98 Proceedings of the 1998 IEEE International Test Conference
Reducing Test Application Time for Full Scan Embedded Cores
FTCS '99 Proceedings of the Twenty-Ninth Annual International Symposium on Fault-Tolerant Computing
Test Transformation to Improve Compaction by Statistical Encoding
VLSID '00 Proceedings of the 13th International Conference on VLSI Design
Scan Vector Compression/Decompression Using Statistical Coding
VTS '99 Proceedings of the 1999 17TH IEEE VLSI Test Symposium
Virtual Scan Chains: A Means for Reducing Scan Length in Cores
VTS '00 Proceedings of the 18th IEEE VLSI Test Symposium
REDUCING TEST DATA VOLUME USING EXTERNAL/LBIST HYBRID TEST PATTERNS
ITC '00 Proceedings of the 2000 IEEE International Test Conference
Dynamic Test Compression Using Statistical Coding
ATS '01 Proceedings of the 10th Asian Test Symposium
Proceedings of the conference on Design, automation and test in Europe
Frequency-Directed Run-Length (FDR) Codes with Application to System-on-a-Chip Test Data Compression
VTS '01 Proceedings of the 19th IEEE VLSI Test Symposium
Hybrid BIST Based on Weighted Pseudo-Random Testing: A New Test Resource Partitioning Scheme
VTS '01 Proceedings of the 19th IEEE VLSI Test Symposium
Test Vector Compression Using EDA-ATE Synergies
VTS '02 Proceedings of the 20th IEEE VLSI Test Symposium
VTS '02 Proceedings of the 20th IEEE VLSI Test Symposium
A cocktail approach on random access scan toward low power and high efficiency test
ICCAD '05 Proceedings of the 2005 IEEE/ACM International conference on Computer-aided design
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
A Test Data Compression Scheme for Reducing Power Based on OLELC and NBET
ICIC '08 Proceedings of the 4th international conference on Intelligent Computing: Advanced Intelligent Computing Theories and Applications - with Aspects of Theoretical and Methodological Issues
Low-power scan testing for test data compression using a routing-driven scan architecture
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Time-multiplexed compressed test of SOC designs
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
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This paper presents a design-for-test (DFT) technique to implement a "virtual scan chain" in a core that looks (to the system integrator) like it is shorter than the real scan chain inside the core. A core with a "virtual scan chain" is fully compatible with a core with a regular scan chain in terms of both the external test interface and tester program. The I/O pins of a core with a virtual scan chain are identical to the I/O pins of a core with a regular scan chain. For the system integrator, testing a core with a virtual scan chain is identical to testing a core with a regular scan chain (no special modes, control signals, or timing sequences are needed). The only difference is that the virtual scan chain is much shorter so the size of the scan vectors and output response is smaller resulting in less test data as well as less test time (fewer scan shift cycles). The process of mapping the virtual scan vectors to real scan vectors is handled inside the core and is completely transparent to the system integrator.