Method and system for layout and schematic generation for heterogeneous arrays

• US 5,910,733 A
• Filed: 11/12/1997
• Issued: 06/08/1999
• Est. Priority Date: 12/12/1995
• Status: Expired due to Fees

• Current Assignee: GlobalFoundries, Inc.
• Original Assignee: International Business Machines Corporation
• Inventors: Gould, Scott Whitney, Bertolet, Allan Robert, Reny, Timothy Shawn, Clinton, Kim P.N., Keyser, Frank Ray III, Zittritsch, Terrance John
• Primary Examiner(s): Tokar, Michael J.
• Assistant Examiner(s): ROSEEN, RICHARD R
• Application Number:
  US08/968,543
• Time in Patent Office: 573 Days
• Field of Search: 326/39, 326/38, 326/41
• US Class Current: 326/41
• CPC Class Codes: G06F 30/39 Circuit design at the physical level physical level design for reconfigurable circuits G06F30/347

Abstract

A method and system for defining, placing and routing kernels for a family of integrated circuits is provided. The integrated circuits are defined using repeatable row and column circuit types. Kernels are defined by the intersections of the row and column circuit types in the array. The kernels are placed and routed automatically for each member of the family of integrated circuit arrays, each member being generally characterized by a different size, i.e., a different number of repeatable row or column circuit types.

Claims

1. An architecture for a family of differently sized programmable arrays, each member of the family having a plurality of logic cells and support circuitry therein, the logic cells being arranged in four sections, the support circuitry being generally distributed throughout a cruciform-shaped region generally centered in the array which defines the four sections of logic cells therein, such that the length of the arms of the cruciform and the sizes of the sections can be together varied to produce the differently sized members of the family of programmable arrays.

2. The architecture of claim 1, wherein logic cells within each of the four sections are grouped into sectors.

3. The architecture of claim 1, further comprising a plurality of I/O regions about a periphery thereof.

4. The architecture of claim 1, wherein the family of differently sized programmable arrays comprises field programmable gate arrays.

5. The architecture of claim 1, wherein the plurality of logic cells are arranged in column and row regions.

6. A programmable array, comprising:

a plurality of logic cells;

support circuitry for the plurality of logic cells arranged in a cruciform-shaped region including four arms generally centered in the programmable array and separating the plurality of logic cells into four sections, wherein a length of the arms and a size of the four sections can be varied to achieve a desired size for the programmable array; and

I/O circuitry about an outer periphery of the plurality of logic cells.

7. The programmable array of claim 6, wherein the programmable array comprises a field programmable gate array.

8. The programmable array of claim 6, wherein the plurality of logic cells are arranged in rows and columns, each of the rows and columns comprising different circuit types.

9. The programmable array of claim 8, wherein each of the rows and columns has a given sequence of circuit types.