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EP0600608A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Design verification method for programmable logic design

Assignee: Altera Corp
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Filing: 1993-10-29
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Granted: —
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Expires: 2013-10-29
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Abstract

Abstract A technique for checking a logic design for compliance with a set of design rules in a computer-aided logic design system. An initial logic design is provided in computer-readable form in a logic design file. A set of design rules expressing permitted and prohibited structural and functional logic device relationships is provided as a portion of a logic design simulation system capable of synthesizing the initial design into a simulated network list. The initial design is checked against the various design rules incorporated into the set, and any violation of the design rules by the initial logic design is visibly displayed to the user. In one mode of operation, a list of user selectable optional rules is visibly displayed. A hierarchy of levels of design compliance is also displayed for user selection. For some design rules, a comparison can be made with the synthesized version of the initial logic design in order to spot design rule violations introduced by the synthesis process.

Inventors

  • 👤 Brent Alan Fairbanks

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 07:00
CPC Classifications
G; G06; G06F; G06F30/00; G06F30/30; G06F30/32; G06F30/33

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 109 words
In a computer-aided logic design system for designing and testing logic circuitry prior to physical implementation, a method for verifying compliance of an initial logic design with a pre-selected set of design rules, said method comprising the steps of: (a) providing a set of design rules expressing permitted and prohibited structural and functional logic device relationships; (b) providing a logic design file incorporating the initial logic design in computer-readable form; (c) comparing at least portions of the initial logic design to at least some of the design rules in the set; and (d) providing a user-discernable indication of any violation of the design rules by the initial logic design.
Claim 2
Dependent Claim 22 words
The invention of claim 1 wherein said method further includes the step (e) of providing a user-selectable list of optional rules selections.
Claim 3
Dependent Claim 22 words
The invention of claim 2 wherein step (e) of providing includes the step of visibly displaying the list of optional rule selections.
Claim 4
Dependent Claim 30 words
The invention of any preceding claim wherein said method further includes the step (f) of enabling a user to select among a hierarchy of levels of design rule compliance .
Claim 5
Dependent Claim 25 words
The invention of claim 4 wherein said step (f) of enabling includes the step of visibly displaying the hierarchy of levels of design rule compliance.
Claim 6
Dependent Claim 41 words
The invention of any preceding claim further including the steps of performing a logic synthesis of the initial logic design and repeating said steps (c) of comparing and (d) of providing with the logic synthesis version of the initial logic design.

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