Memory Controller Frequency Scaling for Sequential Power Reduction
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Solution Overview
Problem
Flash memory systems experience excessive power consumption during sequential read and write operations, leading to increased temperature and inefficient energy usage.
Innovation Solution
A memory controller adjusts the core frequency and voltage of processors in response to command thresholds to reduce power consumption while maintaining operational speed and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the memory system operates at high frequency and voltage to maintain high operational speeds, then productivity is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the frequency and voltage of the memory system adjustable rather than fixed. The controller dynamically changes operating parameters based on command sequences: it operates at high frequency/voltage during random read/write operations to maintain speed, and reduces frequency/voltage during sequential operations to save power, thus resolving the contradiction between productivity and energy consumption
Solution Approach 2:
The patent directly changes physical parameters (frequency and voltage) to resolve the contradiction. By detecting command sequences and adjusting these parameters accordingly, the system achieves high productivity when needed while minimizing power consumption during less demanding operations, effectively balancing the two opposing requirements
2Productivity
If the memory system operates at high power to maintain high operational speeds, then productivity is improved, but temperature increases excessively
Solution Approach 1:
The patent implements periodic action by alternating between high-power and low-power operating states based on detected command sequences. During random operations, the system operates at high power for speed; during sequential operations, it switches to low power to reduce heat generation. This periodic switching between operational modes prevents excessive temperature buildup while maintaining productivity when required
3Use of energy by moving object
If the frequency or voltage is reduced to minimize power consumption, then energy efficiency is improved, but operational speed decreases
Solution Approach 1:
The system resolves this contradiction through dynamic parameter adjustment based on operational context. The controller detects command sequences and adaptively changes frequency and voltage: reducing them during sequential operations when high speed is less critical, and restoring them during random operations when performance is prioritized. This dynamic approach ensures energy efficiency without permanently sacrificing operational speed
Data Source
AI summary
Example memory systems, methods, and controllers for reducing power consumption in memory systems are disclosed. One example method includes determining, by a controller of a memory system and based on multiple commands received by the memory system during a first period of time, that a condition is met. A frequency or a voltage applied to one or more processors of the controller is reduced by the controller in response to determining that the condition is met.