Die-Stacked Memory with Reconfigurable Logic for Bandwidth Offload
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Solution Overview
Problem
Current memory system designs face limitations in flexibility and efficiency due to hard-coded silicon implementations, which restrict the ability to enhance memory performance without redesigning components, leading to increased costs and complexity, and limited access to memory bandwidth by external reconfigurable chips.
Innovation Solution
The integration of a die-stacked memory device with a reconfigurable logic device and a data translation controller, allowing for dynamic configuration and offloading of data manipulation and translation operations, thereby improving processing efficiency and reducing power consumption by leveraging tight integration with memory dies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hard-coded silicon implementation is used in memory systems, then system performance can be improved, but system flexibility deteriorates as additional or different memory performance features require redesigning the logic
Solution Approach 1:
The patent implements reconfigurable logic that can be dynamically programmed after fabrication to provide different memory performance features. The logic portion of the memory device can be reconfigured via configuration data stored in the memory device itself, allowing the system to adapt to different performance requirements without physical redesign.
Solution Approach 2:
The reconfigurable logic device serves multiple functions depending on its configuration. The same hardware structure can be programmed to provide different memory performance enhancements, making a single device universally applicable to various memory optimization needs rather than requiring specialized hardware for each function.
2Adaptability or versatility
If a separate reconfigurable chip is incorporated to introduce flexibility, then system adaptability is improved, but device complexity and cost increase as the system must accommodate the additional chip
Solution Approach 1:
The patent merges the reconfigurable logic device with the memory device into a single integrated package. The logic portion and memory portion are combined in one device, eliminating the need for separate reconfigurable chips and reducing system complexity while maintaining flexibility.
Solution Approach 2:
The reconfigurable logic is nested within the memory device structure. The logic portion is integrated alongside the memory cells, with configuration data stored within the memory device itself, creating a compact nested architecture that reduces the number of discrete components.
3Adaptability or versatility
If a separate reconfigurable chip is used, then system flexibility is improved, but access to memory bandwidth is limited by the bandwidth available on board-level or system-level links
Solution Approach 1:
By merging the reconfigurable logic with the memory device, the logic gains direct access to the memory bandwidth through internal connections rather than external board-level links. This integration eliminates the bandwidth bottleneck of system-level interconnects.
Solution Approach 2:
The integrated logic portion acts as an intermediary between the memory cells and external systems, enabling data manipulation and translation operations to be performed directly within the memory device without requiring external communication through limited bandwidth links.
4Manufacturing precision
If hard-coded silicon implementation is used, then manufacturing precision can be maintained, but ease of manufacture deteriorates as redesigning logic increases design costs and production costs
Solution Approach 1:
The reconfigurable logic allows functional changes without physical redesign. The same manufactured hardware can be reprogrammed via configuration data to provide different functions, eliminating costly redesign cycles while maintaining manufacturing precision.
Solution Approach 2:
The logic is manufactured in a preliminary reconfigurable state, with the capability to be programmed later. This preliminary fabrication approach allows standard manufacturing processes to produce versatile hardware that can be customized through software configuration rather than requiring expensive custom fabrication for each function.
Data Source
AI summary
A die-stacked memory device incorporates a reconfigurable logic device to provide implementation flexibility in performing various data manipulation operations and other memory operations that use data stored in the die-stacked memory device or that result in data that is to be stored in the die-stacked memory device. One or more configuration files representing corresponding logic configurations for the reconfigurable logic device can be stored in a configuration store at the die-stacked memory device, and a configuration controller can program a reconfigurable logic fabric of the reconfigurable logic device using a selected one of the configuration files. Due to the integration of the logic dies and the memory dies, the reconfigurable logic device can perform various data manipulation operations with higher bandwidth and lower latency and power consumption compared to devices external to the die-stacked memory device.