Memory System Sleep-State Control for Lower Idle Power
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Solution Overview
Problem
Existing memory systems face challenges in reducing power consumption across different usage scenarios, particularly when there is no data transmission with the host, leading to increased power consumption and reduced standby time.
Innovation Solution
The memory system incorporates a memory controller that controls sequential transitions between activation modes and sleep modes, including an idle mode and first and second sleep modes, with power consumption decreasing from activation mode to sleep mode, and further reducing power by cutting off supplies in deeper sleep modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the memory system maintains data transmission state continuously, then the response speed to host demands is improved, but the power consumption increases significantly during idle periods
Solution Approach 1:
The memory controller dynamically adjusts the operating state of the memory system based on activity detection. When no data transmission is detected with the host, the system transitions from an active data transmission state to a sleep mode, reducing power consumption while maintaining the capability to quickly resume data transmission when needed.
Solution Approach 2:
The system changes operational parameters by switching between different power modes. The memory controller modifies the power state of the memory system from full operational mode during data transmission to reduced power mode during idle periods, thereby optimizing the balance between response speed and power consumption.
2Use of energy by moving object
If the memory system enters deep sleep mode to reduce power consumption, then the power consumption decreases, but the response delay increases
Solution Approach 1:
The memory controller performs preliminary actions by detecting idle conditions and transitioning the memory system to sleep mode in advance before actual data transmission is needed. This proactive approach allows the system to be already in a low-power state when idle, and可以快速 transition back to active mode when data transmission is required, minimizing the perceived response delay.
3Use of energy by moving object
If the memory system uses multiple sleep modes with different power levels, then the power consumption optimization is improved, but the control complexity increases
Solution Approach 1:
The sleep mode is segmented into different depth levels (first sleep mode and second sleep mode) with progressively lower power consumption. The memory controller can select appropriate sleep depth based on the duration and nature of idle periods, allowing fine-grained power optimization without requiring complex control logic for each individual component.
Data Source
AI summary
A memory system includes at least one memory device and a memory controller coupled with the at least one memory device. The memory controller is configured to control the memory system to enter a first activation mode and a transition mode sequentially, and control the memory system to maintain in the transition mode for a first period of time. The transition mode includes an idle mode and a first sleep mode. A power of the memory system in the first sleep mode is less than a power of the memory system in the idle mode. The power of the memory system in the idle mode is less than a power of the memory system in the first activation mode.