Array of configurable logic blocks including cascadable lookup tables
US5586044A · kind A · utility
95Cited by
14References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17744
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable integrated circuit includes configurable logic blocks (CLB's), configurable input/output blocks (IOB's) and a configurable interconnect network for providing program-defined routing of signals between the CLB's and IOB's. Each CLB includes a plurality of function lookup tables (LUT's) each defined by a bit storage area and a select means responsive to input signals for selecting a stored bit. The design includes first and second LUT's that share a same plurality of input signals where the output of one of the LUT's is connectable by direct connect means to an input of a further pair of LUT's.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.