Modular ECC Circuitry for Scalable Multi-Channel IO Links
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Solution Overview
Problem
High-bandwidth semiconductor chips with programmable logic face challenges in timely error detection and handling due to reconfiguration complexities, leading to issues with wire routing and routing congestion in existing error handling schemes.
Innovation Solution
A modular Error Correction Code (ECC) scheme is implemented, where ECC encoders and decoders are deployed close to reconfigurable components outside the FPGA, performing local computations and transmitting only parity bits to reduce wire routing congestion and improve scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ECC encoders and decoders are deployed inside the FPGA, then error handling is integrated, but wire routing congestion increases
Solution Approach 1:
The parity check matrix H is divided into multiple block matrices, and ECC processing is segmented into multiple distributed modules. Each module handles a subset of parity bits locally, eliminating the need for all data bits to be routed to a single centralized ECC unit. This segmentation directly reduces wire routing congestion while maintaining error handling capability.
2Adaptability or versatility
If reconfiguration is performed to support new applications, then adaptability improves, but compatibility with existing error handling schemes deteriorates
Solution Approach 1:
The modular ECC architecture with distributed block matrix processing provides a universal error handling framework that works with various reconfiguration scenarios. The system can adapt to different application requirements while maintaining consistent error protection, as the block matrix structure can be configured to match different data widths and reconfiguration patterns.
3Device complexity
If a centralized ECC scheme is used, then error handling is simplified, but scalability to high-bandwidth multi-channel links deteriorates
Solution Approach 1:
The patent transitions from a centralized single-die ECC architecture to a distributed multi-die ECC architecture. By distributing ECC modules across multiple dies and utilizing inter-die communication channels, the system achieves scalability for high-bandwidth applications while maintaining manageable complexity through the block matrix partitioning approach.
Data Source
AI summary
A modular Error Correction Code (ECC) scheme in a multi-channel IO link of an integrated circuit device is provided. The integrated circuit device may include core logic circuitry that may be configured after manufacturing. To accommodate the resulting variation, the modular ECC scheme may allow for partitioning a parity check matrix associated with the configuration of the core logic and peripheries coupled to the core logic. The parity check matrix is partitioned into smaller block matrices that is programmable. Multiple ECC modules corresponding to the block matrices are used to provide error detection and correction in the multi-channel IO link. The modular ECC scheme combined with programmable matrices (configurability) enables multi-channel IO link to be flexible to form different IO topologies.