Method and system for programmable boundary-scan instruction register
US7073110B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Sep 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flexible architecture for extending the instruction set for a boundary-scan interface. An instruction can be selected from a memory store (308) and decoded by a decoder (310). The instruction can subsequently be shifted into an instruction register (349) where it can be executed. Alternatively, a length of an existing instruction register (382) of a boundary-scan interface can be programmably appended to effectively increase the length of the register. A plurality of serially arranged bit registers (376, 378, 380) can be connected in series with the existing instruction register. By selecting an outer one of the serially arranged bit registers, the length of the existing instruction register can be extended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.