US5338984A
Expired / Lapsed
US
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Local and express diagonal busses in a configurable logic array
Assignee: National Semiconductor Corp
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Filing: 1993-02-05
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Granted: 1994-08-16
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Expires: 2013-02-05
Abstract
Abstract The present invention provides a configurable logic array that includes a plurality of individually configurable logic cells arranged in a matrix that includes a plurality of horizontal rows of logic cells and a plurality of vertical columns of logic cells. The array further includes at least one horizontally aligned express bus running between adjacent rows of logic cells, the logic cells in the adjacent rows being connectable thereto, and at least one vertically aligned express bus running between adjacent columns of logic cells, the logic cells in the adjacent columns being connectable thereto. The array further includes at least one generally diagonally aligned local and/or express bus running between adjacent diagonally aligned logic cells, the adjacent diagonally aligned logic cells being connectable thereto.
Inventors
- 👤 Jim Sutherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:38
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/173; H03K19/177; H03K19/17736; H03K17/00; H03K17/22; H03K17/223; H03K19/003; H03K19/00346; H03K19/00361; H03K19/1733; H03K19/1735; H03K19/1736; H03K19/17704; H03K19/17724; H03K19/17728
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A configurable logic array comprising: a plurality of individually configurable logic cells arranged in a matrix that includes a plurality of horizontal rows of logic cells and a plurality of vertical columns of logic cells; at least one horizontally aligned express bus running between adjacent rows of logic cells, said logic cells in said adjacent rows being selectively connectable thereto; at least one vertically aligned express bus running between adjacent columns of logic cells, said logic cells in said adjacent columns being selectively connectable thereto; and at least one generally diagonally aligned express bus running between adjacent diagonally aligned logic cells, said adjacent diagonally aligned logic cells being selectively connectable thereto.
Claim 2
Dependent Claim
111 words
A configurable logic array comprising: a plurality of individually configurable logic cells arranged in a matrix that includes a plurality of horizontal rows of logic cells and a plurality of vertical columns of logic cells; at least one horizontally aligned express bus running between adjacent rows of logic cells, said logic cells in said adjacent rows being selectively connectable thereto; at least one vertically aligned express bus running between adjacent columns of logic cells, said logic cells in said adjacent columns being selectively connectable thereto; and at least one generally diagonally aligned express bus running between adjacent diagonally aligned logic cells, said adjacent diagonally aligned logic cells being selectively connectable thereto.
Claim 3
Dependent Claim
76 words
A configurable logic array as in claim 1, and wherein said at least one generally diagonally aligned express bus runs between adjacent logic cells aligned diagonally in a first direction, and further comprising at least one generally diagonally aligned express bus running between adjacent logic cells aligned diagonally in a second direction different from the first direction, said adjacent logic cells being selectively connectable to said generally diagonally aligned express bus running in said second direction.
Claim 4
Dependent Claim
47 words
A configurable logic array as in claim 2, and wherein individual logic cells in said configurable logic array are selectively connectable both to a first diagonally aligned express bus running in the first direction and to a second diagonally aligned express bus running in the second direction.
References Cited (Backward Citations)
US4642487A
Cited
US5144166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |