Patent US6287946B1 successfully refreshed from Google Patents.
US5452227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for converting a programmable logic device designed into a selectable target gate array design
Assignee: Northrop Grumman Corp
•
Filing: 1991-11-13
•
Granted: 1995-09-19
•
Expires: 2011-11-13
Abstract
Abstract The present invention is a translation system that translates a definition of a prototyped programmable device defined in a programmable device specification into a generic behavioral model of the device and into lists of logic blocks and connections for implementing the device as a non-programmable device in an application specific target technology. The lists and behavioral models are used to create command files that drive logic synthesis and network connection list processing operations to generate a generic list of logic and network connections. The generic list and commands are used to create device test vectors for testing the behavior of the model and the target device design. The target technology lists and command files are processed to reduce redundant logic and are mapped into logic blocks and connection lists in the target technology. The operation of the target technology design is simulated using the target logic blocks and connections and the test vectors. The behavioral model is compiled to allow behavioral simulation of the operation of the device using the same test vectors. When the simulation of the target technology and the behavioral model produce identical outputs, the target non-programmable design exactly matches the operation of the prototype programmable device and the target technology design can then be used in mass production of the logic device.
Inventors
- 👤 Randy J. Kelsey
- 👤 Larry D. Aschliman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:14
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/3181; G01R31/3183; G01R31/318342; G06; G06F; G06F30/00; G06F30/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A method of logic device specification from a programmable device specification for a programmable device, comprising the steps of: (a) producing a hierarchical behavioral model from the programmable device specification; (b) producing a generic device design from the programmable device specification; (c) simulating operation of the generic device design responsive to the hierarchical behavioral model; (d) producing a specific device design from the programmable device specification; (e) simulating operation of the specific device design; and (f) comparing the simulations of steps (c) and (e) and indicating the specific device design is correct when the simulations match.
Claim 2
Independent Claim
96 words
A method of logic device specification from a programmable device specification for a programmable device, comprising the steps of: (a) producing a hierarchical behavioral model from the programmable device specification; (b) producing a generic device design from the programmable device specification; (c) simulating operation of the generic device design responsive to the hierarchical behavioral model; (d) producing a specific device design from the programmable device specification; (e) simulating operation of the specific device design; and (f) comparing the simulations of steps (c) and (e) and indicating the specific device design is correct when the simulations match.
Claim 3
Dependent Claim
30 words
A method as recited in claim 1, further comprising producing test vectors for the generic device design and using the test vectors in the simulations of steps (c) and (d).
Claim 4
Dependent Claim
14 words
A method as recited in claim 1, wherein step (d) includes performing logic reduction.
Claim 5
Dependent Claim
32 words
A method as recited in claim 1, wherein step (b) comprises creating a complete set of hierarchical behavioral models for the programmable device and step (c) comprises simulating the hierarchical behavioral models.
Claim 6
Dependent Claim
16 words
A method as recited in claim 4, wherein step (b) creates behavioral models of input/output blocks.
Claim 7
Dependent Claim
18 words
A method as recited in claim 1, wherein the programmable device specification is a programmable device configuration file.
Claim 8
Independent Claim
54 words
A method of logic device specification from a programmable device specification for a programmable device, comprising the steps of: (a) simulating the programmable device using a complete hierarchical behavioral model of the device; (b) simulating the programmable device as a target technology device; and (c) verifying the target technology device when the simulations match.
Claim 9
Independent Claim
54 words
A method of logic device specification from a programmable device specification for a programmable device, comprising the steps of: (a) simulating the programmable device using a complete hierarchical behavioral model of the device; (b) simulating the programmable device as a target technology device; and (c) verifying the target technology device when the simulations match.
Claim 10
Independent Claim
223 words
A method of specifying an application specific integrated circuit logic device in a target technology from a programmable device configuration file for a programmable device, comprising the steps of: (a) translating the programmable device configuration file into a behavioral model having delays and timings of the programmable device, and device lists; (b) creating netlist processing, logic synthesis, target and compiler commands from the device lists; (c) performing logic synthesis from the behavioral model responsive to the logic synthesis commands; (d) processing the synthesized logic to produce a hierarchical behavioral model and a generic network list responsive to the netlist processing commands; (e) reducing the generic network list; (f) generating a test vector from the reduced generic network list; (h) compiling the behavioral model; (i) simulating operation of the behavioral model using the compiled behavioral model, the hierarchical behavioral model and the test vector; (j) producing a generic/target technology network list responsive to the target commands; (k) mapping the generic/target technology network list to a target technology network list and optimizing the target technology network list; (l) simulating operation of the target technology network list; (m) comparing the behavioral model simulation with the target technology network list simulation; and (n) manufacturing the integrated circuit logic device from the target technology network list when the behavioral model simulation matches the target technology network list simulation.
Claim 11
Independent Claim
223 words
A method of specifying an application specific integrated circuit logic device in a target technology from a programmable device configuration file for a programmable device, comprising the steps of: (a) translating the programmable device configuration file into a behavioral model having delays and timings of the programmable device, and device lists; (b) creating netlist processing, logic synthesis, target and compiler commands from the device lists; (c) performing logic synthesis from the behavioral model responsive to the logic synthesis commands; (d) processing the synthesized logic to produce a hierarchical behavioral model and a generic network list responsive to the netlist processing commands; (e) reducing the generic network list; (f) generating a test vector from the reduced generic network list; (h) compiling the behavioral model; (i) simulating operation of the behavioral model using the compiled behavioral model, the hierarchical behavioral model and the test vector; (j) producing a generic/target technology network list responsive to the target commands; (k) mapping the generic/target technology network list to a target technology network list and optimizing the target technology network list; (l) simulating operation of the target technology network list; (m) comparing the behavioral model simulation with the target technology network list simulation; and (n) manufacturing the integrated circuit logic device from the target technology network list when the behavioral model simulation matches the target technology network list simulation.
Claim 12
Independent Claim
74 words
An apparatus for converting a programmable logic device design into an application specific logic device design, comprising: means for producing and performing a simulation of a hierarchical behavioral device design from the programmable logic device design; means for producing and performing a simulation of the application specific logic device design from the programmable logic device design; and means for comparing the simulations and verifying the application specific logic device design when the simulations match.
Claim 13
Independent Claim
74 words
An apparatus for converting a programmable logic device design into an application specific logic device design, comprising: means for producing and performing a simulation of a hierarchical behavioral device design from the programmable logic device design; means for producing and performing a simulation of the application specific logic device design from the programmable logic device design; and means for comparing the simulations and verifying the application specific logic device design when the simulations match.
References Cited (Backward Citations)
US4571724A
Cited
US4942536A
Cited
US4937770A
Cited
US4922432A
Cited
US5067091A
Cited
US5005136A
Cited
US4967367A
Cited
US5276855A
Cited
US5263149A
Cited
US5084824A
Cited
US5258932A
Cited
US5339262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-18 | 1999-03-20 | 1999-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-18 | 2003-03-20 | 2003-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-18 | 2007-03-20 | 2007-09-19 | $7700.00 | Window Closed / Lapsed |