Memory Controller Scrambling Seed and Modular ECC Design
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Solution Overview
Problem
Existing memory controllers face limitations in data integrity and security due to the use of a single memory address as the scrambling/descrambling seed, leading to predictable data patterns and signal integrity issues. Additionally, they lack a modular error correcting code (ECC) implementation capable of supporting various DRAM interface widths and protocols.
Innovation Solution
A memory controller with a data scrambling/descrambling implementation using multiple seeds, including an address and a fixed seed, and a modular ECC implementation that supports any DRAM interface widths or protocols. This design enhances data security and integrity by reducing predictability and supporting diverse DRAM interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single memory address is used as the scrambling/descrambling seed, then the device complexity is reduced, but data security and signal integrity deteriorate due to predictable data patterns causing resonance
Solution Approach 1:
The seed generation is segmented into multiple independent components: a first seed derived from memory address and a second seed derived from data. This segmentation eliminates the predictability of using a single address-based seed while maintaining manageable device complexity through modular seed generation components.
2Reliability
If multiple seeds are used for scrambling/descrambling, then data security and signal integrity improve, but device complexity increases due to additional seed management requirements
Solution Approach 1:
Both seeds are preliminarily generated before the actual scrambling operation: the first seed is prepared from the memory address and the second seed is prepared from the data itself. This preliminary action allows the complex multi-seed process to be organized in advance, reducing the operational complexity during the scrambling/descrambling execution.
3Device complexity
If a non-modular ECC implementation is used, then the device complexity is reduced, but adaptability deteriorates as it cannot support various DRAM interface widths or protocols
Solution Approach 1:
The ECC implementation is designed as a modular universal structure that can function across multiple DRAM interface widths and protocols. The modular design allows the same ECC component to be configured for different interface requirements, achieving multi-functionality without increasing fundamental device complexity.
4Adaptability or versatility
If a modular ECC implementation is implemented, then adaptability improves to support any DRAM interface widths or protocols, but device complexity increases due to modular architecture requirements
Solution Approach 1:
The modular ECC implementation employs dynamic configuration capabilities where the ECC structure can be adapted to different DRAM interface widths and protocols as needed. This dynamic adaptability allows the system to optimize its ECC configuration for each specific interface requirement, achieving versatility while managing complexity through runtime configuration rather than fixed hardware for each interface type.
Data Source
AI summary
A memory controller for improving data integrity and providing data security. The memory controller including a transmit data path to transmit write data to a memory device, the transmit data path comprising a scrambling component, wherein the scrambling component includes a scrambling logic and an exclusive OR logic, wherein the write data is divided into a first portion and a second portion, wherein input of the scrambling logic comprises the first portion of the write data and an address associated with the write data to generate a pseudo-random output, and wherein input of the exclusive OR logic comprises the second portion of the write data, the pseudo-random output and a fixed seed corresponding to the first portion of the write data to generate a scrambled data.