Shared FPGA Control Signal Muxing for Lower Tile Area
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing FPGA architectures face inefficiencies in control signal muxing due to the limited supply of less resistive metal for global routing wires, leading to increased chip area and costs for implementing control signal muxing in each tile.
Innovation Solution
Implementing a shared control signal muxing circuitry between FPGA tiles, either by adding muxing in a separate tile or distributing it among tiles in a cascaded configuration, to reduce the need for muxing in each individual tile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control signal muxing is implemented in each FPGA tile, then each tile can independently route control signals, but chip area increases and costs increase due to limited less resistive metal supply
Solution Approach 1:
The patent merges control signal muxing resources from multiple tiles into a shared pool. Specifically, control signal muxing circuitry that would traditionally be replicated in each tile is instead consolidated into a shared resource that can be accessed by multiple tiles, reducing redundant circuitry and chip area while maintaining routing capability.
Solution Approach 2:
The shared control signal muxing circuitry serves multiple tiles simultaneously, making it a universal resource. The muxing logic is designed to accept control signals and distribute them to multiple destination tiles through the inter-tile routing network, allowing one set of muxing resources to perform the function that would otherwise require separate muxing in each tile.
2Ease of operation
If control signal muxing is implemented in each FPGA tile, then each tile has full control signal routing capability, but device complexity increases due to replication of muxing circuitry
Solution Approach 1:
The patent merges control signal muxing resources from multiple tiles into a shared pool. Specifically, control signal muxing circuitry that would traditionally be replicated in each tile is instead consolidated into a shared resource that can be accessed by multiple tiles, reducing redundant circuitry and chip area while maintaining routing capability.
3Area of stationary object
If shared control signal muxing is implemented between tiles, then chip area is reduced, but routing flexibility may be limited
Solution Approach 1:
The shared control signal muxing circuitry acts as an intermediary between the control signal sources and the destination tiles. It provides a centralized point for signal distribution that can dynamically route signals to different tiles based on routing requirements, maintaining flexibility while reducing area.
Solution Approach 2:
The shared muxing circuitry is designed to be dynamically configurable, allowing it to adapt its routing behavior based on design requirements. The muxing logic can be programmed or configured to route control signals to different tile destinations, providing routing flexibility comparable to having dedicated muxing in each tile.
Data Source
AI summary
Methods and apparatuses to provide FPGA inter-tile control signal sharing are described. In one embodiment, the FPGA inter-tile muxing for control signals is added in a separate tile. In another embodiment, the control signal muxing is distributed among FPGA tiles and shared using a cascaded configuration.