Optimized buffering for JTAG boundary scan nets

US7000163B1 · kind B1 · utility

Assignee

• LSI Logic Corporation · US

Inventors

• Juergen Dirks · Holzkirchen, DE
• Juergen Lahner · معلمی نژاد, US
• Ludger F. Johanterwage · San Jose, US
• Benjamin Mbouombouo · San Jose, US
• Human Boluki · Munich, DE
• Weidan Li · San Jose, US

Key dates

• Filing date: Feb 25, 2002
• Grant date: Feb 14, 2006
• Expiry date: Mar 23, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/318541
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus comprising one or more groups of boundary scan cells, one or more group buffers, one or more repeater buffers and a controller. The group buffers may be coupled to each of the groups of boundary scan cells. The repeater buffers may be coupled in series with the group buffers. The controller may be coupled to the groups of boundary scan cells through the group buffers and the repeater buffers. The apparatus may be configured to buffer the groups of boundary scan cells to reflect an order of I/Os around the apparatus.