Application specific integrated circuit with dual-mode system for externally accessible data buses and visibility buses
US6625684B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Feb 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/318505
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An application specific integrated circuit includes a multiplicity of operational blocks each of which includes at least one respective data bus and at least one respective visibility bus and a respective addressable multiplexer for selecting between those buses to provide an output on a to respective block bus. An interface block includes a first addressable multiplexer for selecting output data from a selected one of the blocks and providing an output; a register coupled to the output of the first addressable multiplexer; and a second addressable multiplexer for selecting between data provided by the output of the first addressable multiplexer and data in the register. Different portions of externally supplied address words are applied to the first addressable multiplexer and the respective addressable multiplexer, and a decoder is responsive to the address words for controlling the second addressable multiplexer. The arrangement provides a common multiplexing system for data buses and visibility buses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.