JTAG component description via nonvolatile memory
US5325368A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1991 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Nov 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31702
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Nonvolatile memory is provided on each module of a computer system including one or more modules with each module including a plurality of components including JTAG technology. A test bus operable in accordance with the 1149.1 standard is included in the computer system and is arranged to access the nonvolatile memory. Boundary scan information for the components on a module and also additional information, preferably fully describing all JTAG related characteristics and operations, is stored in the nonvolatile memory. A JTAG bus system is then able to access the module memory and obtain all information required to fully implement JTAG operations for the module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.