Modular FPGA Logic Tiles for In-Situ Reconfiguration
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Solution Overview
Problem
Existing FPGA technologies lack the ability to efficiently reconfigure logic tiles in situ while operational, limiting their flexibility and adaptability for diverse computing tasks.
Innovation Solution
The FPGA is designed with a modular computing architecture that allows logic tiles to be functionally partitioned and reconfigured independently, enabling them to perform multiple operations without re-initialization, facilitated by a common interface with resources like high-speed local RAM and external circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If logic tiles are reconfigured in situ while operational, then adaptability and flexibility are improved, but device complexity increases
Solution Approach 1:
The FPGA is divided into multiple independent logic tiles that can be individually reconfigured. Each logic tile contains programmable logic components and configurable interconnects, allowing selective reconfiguration of specific tiles without affecting the entire device. This segmentation enables partial reconfiguration, improving adaptability while managing complexity through modular design.
Solution Approach 2:
The patent implements dynamic reconfiguration capability where logic tiles can be reconfigured in situ during operational periods. The system transitions from static configuration to dynamic reconfiguration, allowing the FPGA to adapt its functionality during runtime. This is achieved through configuration memory elements that can be updated without resetting the entire device, enabling flexible adaptation to changing computational requirements.
2Productivity
If logic tiles are reconfigured independently, then productivity and resource utilization are improved, but device complexity increases
Solution Approach 1:
The FPGA architecture segments the logic array into independently reconfigurable tiles. Each tile can be configured for different functions simultaneously or sequentially, allowing parallel operation of multiple logic functions. This segmentation enables higher productivity by utilizing different portions of the FPGA for different tasks without requiring full reconfiguration of the device.
Solution Approach 2:
Each logic tile is designed with universal programmable components including logic elements, memory resources, and configurable interconnects. These universal building blocks can be programmed to perform multiple different functions, allowing the same physical hardware to serve multiple purposes. This multi-functionality improves resource utilization and productivity while maintaining a relatively simple underlying device structure.
3Loss of time
If reconfiguration is performed without re-initialization, then loss of time is reduced, but reliability may worsen
Solution Approach 1:
The patent implements configuration memory elements and control circuitry that are prepared in advance to support in situ reconfiguration. Configuration data can be loaded into buffer memory before reconfiguration is needed, and control logic is pre-configured to manage the reconfiguration process. This preliminary preparation reduces reconfiguration time while maintaining reliability through controlled transition sequences.
Solution Approach 2:
The system maintains continuous operational capability during reconfiguration events. While some logic tiles are being reconfigured, other tiles continue to perform their designated functions without interruption. The architecture supports seamless transition between configuration states, ensuring that the FPGA remains productive throughout the reconfiguration process rather than requiring complete shutdown and re-initialization.
Data Source
AI summary
An integrated circuit comprising an FPGA including programmable/configurable logic circuitry having a periphery, wherein resources (e.g., memory (e.g., high-speed local RAM), one or more busses, and/or circuitry external to the FPGA (e.g., a processor, a controller and/or system/external memory), is/are disposed outside the periphery of the programmable/configurable logic circuitry which includes a plurality of logic tiles, wherein at least one logic tile is located completely within the interior of the periphery and wherein each logic tile of the array of logic tiles includes a plurality of I/Os located on the perimeter of the logic tile wherein a first portion of the I/Os are located on a perimeter of the logic tile that is interior to the periphery, and the first portion of I/Os of each logic tile of the plurality of the logic tiles are directly connected to the bus to provide communication between the resources and the logic tiles.