Programmable logic integrated circuits with partitioned logic element using shared lab-wide signals
US5815003A · kind A · utility
78Cited by
16References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17728
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A programmable logic device (10) has a number of programmable logic elements (LEs) (12) which are grouped together in a plurality of logic array blocks (LABs) (14). An LE incorporates a plurality of partitioned look-up tables (40a, 40b) that may be selectively connected to its inputs and outputs by means of a number of multiplexers (44a-d, 46). Shared LAB-wide input lines (43a, 43b) provide a shared input line into a number of LEs in a LAB. A digital information processing system (500) incorporating the invention is disclosed. A wide-input AND gate (74) combining the outputs of a number of LEs is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.