Representative Bitstream Validation for Programmable Logic Devices
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Solution Overview
Problem
Programmable logic devices (PLDs) are complex and prone to defects, leading to high production costs and inefficient validation processes due to the need for extensive testing of multiple configuration bitstreams to meet varying timing requirements, which is time-consuming and costly for customers.
Innovation Solution
A method to analyze multiple implementations of a circuit design, determine minimum timing constraints, generate a representative implementation that meets these constraints, and optimize timing performance to ensure validation across all configurations, thereby reducing the need for extensive testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple configuration bitstreams are tested to ensure timing requirements are met, then validation reliability is improved, but validation time and cost increase significantly
Solution Approach 1:
The patent creates a representative bitstream that copies the essential timing characteristics of multiple actual bitstreams. This representative bitstream serves as a surrogate for testing, allowing validation of timing requirements without testing every possible bitstream configuration. The representative bitstream is generated by analyzing multiple implementations and synthesizing a single bitstream that meets all timing constraints.
Solution Approach 2:
The patent performs preliminary analysis of multiple bitstream implementations before actual validation testing. By determining minimum timing constraints in advance and creating a representative bitstream that satisfies these constraints, the system prepares validation data beforehand, eliminating the need for extensive runtime testing of multiple bitstreams.
2Manufacturing precision
If comprehensive testing of all bitstream combinations is performed, then timing constraint compliance is improved, but manufacturing cost increases
Solution Approach 1:
Instead of manufacturing and testing multiple physical bitstream variants, the patent creates a single representative bitstream that models the timing behavior of all variants. This reduces manufacturing complexity and cost while maintaining timing constraint compliance through careful synthesis of the representative bitstream from multiple implementation analyses.
3Adaptability or versatility
If the number of programmable logic devices is increased to handle multiple configurations, then design flexibility is improved, but device complexity and defect probability increase
Solution Approach 1:
The patent makes a single programmable logic device universal by enabling it to handle multiple configuration bitstreams through a unified validation approach. The representative bitstream mechanism allows one device to satisfy multiple design requirements without needing separate validation infrastructure for each configuration, reducing device complexity while maintaining flexibility.
Data Source
AI summary
Methods of enabling the validation of an integrated circuit adapted to receive one of a plurality of configuration bitstreams for a circuit design is disclosed. The method comprises analyzing a plurality of implementations for the circuit design; determining minimum timing constraints based upon all of the implementations for the circuit design; generating a representative implementation, based upon the plurality of implementations, which meets the determined minimum timing constraints for all of the implementations of the circuit design; and outputting the representative implementation.