Apparatus for accelerating through-the-pins LBIST simulation

US7478304B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Tilman Gloekler · Schrobenhausen, DE
• Christian Habermann · Stuttgart, DE
• Naoki Kiryu · Tokyo, JP
• Joachim Kneisel · Stuttgart, DE
• Johannes Koesters · Holzgerlingen, DE

Key dates

• Filing date: Nov 8, 2007
• Grant date: Jan 13, 2009
• Expiry date: Nov 8, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/318357
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention provides an apparatus and a computer program product for applying external clock and data patterns for TTP-LBIST. A simulation model for the logic under test is set up in a simulator. Next, a user sets up an external LBIST block, which comprises pre-verified internal clock and data pattern logic, and connects this block to the logic in the simulation model. The internal clock and data pattern logic provides the input patterns used in OPCG modes of LBIST. This internal clock and data pattern logic is already verified through the design effort. Therefore, the internal pattern generators become the external pattern generators in the simulation model. The external LBIST block applies the external clock and data patterns, and subsequently, the user receives and processes these output patterns to determine if the logic operates correctly.