Signal Processing Accelerator Architecture for Lower FPGA Area Waste
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Solution Overview
Problem
The challenge in FPGA architectures is the inefficiency and cost-effectiveness of incorporating specialized blocks, as they often go unused and require a large variety of variations, making it difficult to determine which blocks to include in a design until late in the development process, leading to wasted resources and increased complexity.
Innovation Solution
A hybrid architecture that includes a network of coarse-grained signal processing accelerators (SPAs) connected through a statically configured interconnect network, allowing for flexible configuration and reduced power consumption, while maintaining programmability and functionality similar to FPGAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If specialized blocks are added to FPGA architectures, then performance of speed-critical blocks is improved, but device area increases and cost-efficiency decreases
Solution Approach 1:
The patent implements a unified interconnect network that serves both as a routing fabric for logic cells and as a direct connection path for specialized blocks. This multi-functional interconnect structure allows the same physical infrastructure to support both general-purpose programmable logic and dedicated high-speed functions, eliminating the need for separate specialized interconnect structures that would increase area.
Solution Approach 2:
The patent merges the interconnect network for logic cells with the interconnect network for specialized blocks into a single unified structure. By combining these previously separate functions into one shared interconnect fabric, the patent reduces overall device area while maintaining the performance benefits of direct specialized block connections.
2Ease of manufacture
If specialized blocks are added to FPGA architectures, then timing closure effort is reduced, but device complexity increases
Solution Approach 1:
The unified interconnect network provides a consistent routing paradigm for both logic cells and specialized blocks, allowing the same timing closure methodologies and tools to be applied throughout the device. This universal approach simplifies the design process by eliminating the need to handle separate timing domains and interconnect structures.
3Adaptability or versatility
If specialized blocks are added to FPGA architectures, then functionality is improved, but resource waste increases when blocks are unused
Solution Approach 1:
The unified interconnect network allows specialized blocks to be dynamically configured and activated based on actual design needs. When specialized functionality is required, these blocks can be directly integrated into the logic fabric through the shared interconnect. When not needed, the same interconnect resources continue to serve general-purpose logic cell routing, ensuring no resources are wasted regardless of usage patterns.
4Adaptability or versatility
If FPGAs are made with many different members and variations to include specialized blocks, then functionality is improved, but manufacturing cost-efficiency decreases
Solution Approach 1:
The patent implements a universal FPGA architecture with a unified interconnect network that can accommodate specialized blocks of various types and configurations within the same device family. This approach allows a single base architecture to serve multiple market segments and application requirements, eliminating the need to manufacture multiple specialized FPGA variants and improving manufacturing cost-efficiency.
Data Source
AI summary
Systems and methods for configuring a SPA are disclosed. The SPA comprises a plurality of input ports, a plurality of data memory units, signal processing circuitry, and an enable block including at least two counters. Each counter determines an amount of unprocessed data that is stored in a respective one of the plurality of data memory units, and the enable block is configured to disable the signal processing circuitry until a predetermined amount of data is received over the input ports.