Memory Controller Channel Layout for Cleaner Multi-Module Signals
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Solution Overview
Problem
The quality of signals transferred through shared signal lines between memory modules and a memory controller deteriorates due to shared usage, leading to inefficiencies in data communication.
Innovation Solution
A memory system design with separate groups of signal lines and buffer chips for each memory module, allowing for selective data paths and reduced reliance on shared signal lines, thereby improving data transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple memory modules share the same signal lines with the memory controller, then the device complexity is reduced, but the signal quality deteriorates due to increased loading and interference
Solution Approach 1:
The patent divides the memory system into multiple independent channels, where each channel has dedicated signal lines connecting the memory controller to specific memory modules. This segmentation eliminates signal interference between modules while maintaining manageable system complexity through organized channel structures.
Solution Approach 2:
The patent introduces channel-specific buffer chips as intermediary components between the memory controller and memory modules. These buffers isolate signal paths, prevent loading effects from propagating across modules, and maintain signal integrity without requiring complete signal line isolation.
2Reliability
If separate signal lines are provided for each memory module, then the signal quality is improved, but the device complexity increases
Solution Approach 1:
The patent designs channel buffer chips that can serve multiple functions: signal buffering, timing control, and pathway selection. This multi-functionality reduces the need for separate dedicated components for each signal line, thereby limiting the increase in device complexity while maintaining signal quality.
Solution Approach 2:
The patent organizes signal lines into distinct channel groups (first channel group, second channel group) that operate in parallel dimensions. This dimensional organization allows multiple memory modules to have dedicated signal paths without creating a linear complexity increase, as the channels are managed through grouped addressing and control mechanisms.
3Reliability
If buffer chips are added to reduce channel loading, then the signal quality is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple buffer functions into channel-specific buffer units that handle signals for multiple memory chips within a channel. This merging reduces the total number of buffer chips required compared to having individual buffers for each memory chip, while still providing adequate signal isolation and quality improvement.
Solution Approach 2:
The buffer chips are integrated directly into the memory module architecture, allowing them to self-manage signal conditioning for their associated memory chips without requiring external control. This self-service capability reduces the control overhead and simplifies the overall system architecture despite the addition of buffer components.
Data Source
AI summary
A memory system includes a memory controller, a first memory module including first and second groups of first memory chips, a second memory module including first and second groups of second memory chips, and a channel including a first group of signal lines suitable for coupling the memory controller with the first memory module, and a second group of signal lines suitable for coupling the memory controller with the second memory module.