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United States Patent
(io) Patent No.: (45) Date of Patent:
US 7,839,169 B2 Nov. 23, 2010
(54) PROGRAMMABLE LOGIC DEVICE WITH EMBEDDED SWITCH FABRIC
(75) Inventor: David K Murotake, Nashua, NH (US)
(73) Assignee: SCA Technica, Inc., Nashua, NH (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl.No.: 12/795,789
(22) Filed: Jun. 8, 2010
(65) Prior Publication Data
US 2010/0244896 Al Sep. 30, 2010
Related U.S. Application Data
(63) Continuation of application No. 12/177,175, filed on Jul. 22, 2008, now Pat. No. 7,733,125, which is a continuation of application No. 10/618,950, filed on Jul. 14, 2003, now Pat. No. 7,404,074.
(60) Provisional application No. 60/395,871, filed on Jul. 12, 2002.
(51) Int. CI.
H01L 25/00 (2006.01)
(52) U.S. CI 326/47; 326/41; 326/101
(58) Field of Classification Search None
See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
The invention in the simplest form is a programmable logic device comprising logic blocks configured substantially in a plane, external I/O endpoints, and embedded switched fabrics which provide non-contentious connection between the logic blocks and between logic blocks and I/O endpoints, the switch fabrics being offset from the plane of the logic blocks. The logic blocks are organized into logic groups, whereby a plurality of primary embedded switch fabrics are configurable for connecting logic blocks within logic groups, and at least one secondary switch fabric provides non-contentious connection between primary switch fabrics. The switch fabrics can employ non-blocking crossbar switches. A hierarchy of secondary switch fabrics can be included for providing non-contentions connection between both primary and other secondary switch fabrics.
19 Claims, 12 Drawing Sheets
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* cited by examiner