JTAGchain bus switching and configuring device

US7454664B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Mike C. Duron · Pflugerville, US
• Robert Allan Faust · Austin, US
• Forrest Clifton Gray · Austin, US
• Ajay Kumar Mahajan · Austin, US
• Glenn Rueban Miles · Austin, US

Key dates

• Filing date: Jun 30, 2003
• Grant date: Nov 18, 2008
• Expiry date: Nov 1, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F13/4022
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Commanding a JTAG bus cross point switching device by the same bus which it configures. Adding, omitting, or rearranging devices on a JTAG bus with a cross point switching device that is included in a JTAG chain. Controlling the switching device with commands on the JTAG bus which it configures.