Memory Controller Block Locking for Multi-Interface Transitions
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Solution Overview
Problem
In computer processing systems, the mismatch in read/write request rates between processors and memory systems leads to inefficiencies, prompting the need for techniques to manage block locking across multiple interfaces in memory devices to optimize throughput.
Innovation Solution
A memory device with a controller that manages block locking states across different interfaces based on priority schemes and write protect logic, using a locking register to preserve locking states during interface transitions, ensuring seamless access and protection of memory cells across parallel channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple parallel channels are used to increase memory throughput, then productivity is improved, but device complexity increases due to the need to manage multiple interfaces and their associated locking states
Solution Approach 1:
The memory device is divided into multiple independent channels, each with its own interface and locking state management. This segmentation allows each channel to operate independently, increasing overall throughput while maintaining manageable complexity through modular design. The controller manages each channel's locking state separately, preventing state conflicts between interfaces.
Solution Approach 2:
The controller is designed to universally manage locking states across multiple different interfaces (parallel and serial). By implementing a unified locking state management mechanism that works across various interface types, the system achieves multi-functionality without proportionally increasing complexity. The same locking principles apply regardless of which interface is active.
2Adaptability or versatility
If interface transitions are implemented to balance processor and memory request rates, then adaptability is improved, but reliability may worsen due to potential loss of locking states during transitions
Solution Approach 1:
Before an interface transition occurs, the controller proactively saves the current locking state from the first interface. This preliminary action ensures that the locking state is preserved and can be restored after the transition, preventing any loss of state information. The saving operation completes before the interface switch, ensuring reliability during adaptability operations.
Solution Approach 2:
The controller acts as an intermediary between different interfaces, managing the transfer of locking state information during transitions. It mediates the transition by saving the state from the outgoing interface and restoring it to the incoming interface, ensuring that no locking state is lost during the adaptation process.
3Reliability
If locking states are saved and restored during interface transitions, then reliability is improved, but device complexity increases due to additional state management operations
Solution Approach 1:
The locking state management operations are merged into the existing interface transition protocol. Rather than adding separate save/restore operations, the state management is integrated into the transition sequence itself. This combining approach improves reliability without proportionally increasing complexity, as the operations share existing control structures and resources.
Data Source
AI summary
Subject matter disclosed herein relates to an apparatus comprising memory and a controller, such as a controller which determines block locking states in association with operative transitions between two or more interfaces that share at least one block of memory. The apparatus may support single channel or multi-channel memory access, write protection state logic, or various interface priority schemes.