Programmable logic device with embedded switch fabric

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US007839169B2

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United States Patent

Murotake

(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)
H03K19/173 (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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Fewer, Colm, "Cross Bar Switch Implemented in FPGAs", Xilinx
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Xilinx, "Software Designed Radio & 4G Development", pp. 1-67.
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tion Signal Processing", pp. 1-6.

* cited by examiner