Internal tristate bus with arbitration logic
US6154050A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1998 |
| Grant date | Nov 28, 2000 |
| Priority date | — |
| Expiry date | Apr 27, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00361
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable logic device having an internal tristate bus is provided. The internal tristate bus may be driven by a plurality of driving elements. Such a tristate bus, and the circuitry for supporting it, can be implemented on less surface area than the multitude of unidirectional buses, and supporting circuitry, which would otherwise be required for the same plurality of driving elements. Accordingly, the amount of surface area that is required to move information within a programmable logic device is reduced. Furthermore, in one embodiment, a arbitration logic circuit is provided for each driving element. These arbitration logic circuits cooperate to prevent the different elements from simultaneously driving the internal tristate bus. Accordingly, the integrity of the information on such bus is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.