Programmable LFSR Pipeline Architecture for High-Speed Multi-Mode Logic
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Solution Overview
Problem
Existing programmable logic devices (PLDs) face challenges in efficiently implementing linear-feedback shift register (LFSR) circuits, particularly in achieving high-speed operation and flexible configuration to support various applications such as pseudorandom number generation, error detection, and high-speed communication standards, while minimizing area and power consumption.
Innovation Solution
The implementation of programmable LFSR circuits with configurable architecture types (type 1 and type 2) and pipeline stages, allowing for programmable multi-mode operation, parallelization, and latency balancing to support high data rates and timing closure, along with standalone resources for specialized LFSR functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional PLD configurations are used to implement LFSR circuits, then basic functionality is achieved, but high-speed operation and flexibility are limited
Solution Approach 1:
The patent implements dynamically reconfigurable LFSR circuits where the architecture type (type 1 or type 2), pipeline stage count, and parallelization degree can be changed at runtime through configuration data. This dynamic reconfiguration capability allows the circuit to adapt its structure to meet different speed and flexibility requirements for various communication standards and applications.
Solution Approach 2:
The patent creates a universal LFSR platform that can implement multiple communication standards (PCIe, USB 3.0, SATA, SAS, NVLink, CXL) and different LFSR architectures (type 1, type 2, and hybrid) within a single device. The configurable resources include programmable logic gates, lookup tables, and embedded hardware that can be programmed to support various LFSR configurations, making one device serve multiple functions.
2Adaptability or versatility
If more configurable resources are added to support high-speed and flexible LFSR operation, then performance and adaptability improve, but device area and power consumption increase
Solution Approach 1:
The patent segments the LFSR circuit into multiple pipeline stages that can be independently configured and optimized. Each pipeline stage contains configurable logic elements that can be selectively enabled or disabled based on the required LFSR architecture type. This segmentation allows the device to allocate resources efficiently, activating only the necessary segments for a given application rather than provisioning resources for all possible configurations simultaneously.
Solution Approach 2:
The patent employs dynamic resource allocation where configuration data selectively activates specific logic paths, pipeline stages, and feedback connections based on the desired LFSR mode. This dynamic activation allows the same physical hardware to serve different logical configurations, reducing the effective area required for any single configuration while maintaining support for multiple configurations over time.
Data Source
AI summary
Various techniques are provided to implement programmable linear-feedback shift register (LFSR) circuits. In one example, the LFSR circuit includes state storage elements. Each state storage element is configured to store a state signal. The LFSR circuit further includes programmable logic stage circuits each configured to selectively receive an input signal and a set of state signals, determine an output signal based at least on the set of state signals, and provide the output signal. Each programmable logic stage circuit is connected to at least one other programmable logic stage circuit. The LFSR circuit further includes pipeline elements. Each pipeline element is configured to selectively connect at least two programmable logic stage circuits. The LFSR circuit further includes sets of latency balance elements. Related systems and methods are provided.