Memory Temperature Readout for Adaptive Refresh Control
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Solution Overview
Problem
Existing memory systems face high power consumption and performance bottlenecks due to inefficient refresh operations, which are influenced by temperature changes in memory devices, leading to suboptimal refresh intervals and increased energy demands.
Innovation Solution
Implementing a temperature sensor data readout system that provides precise temperature data to the memory controller for fine-tuning refresh intervals, reducing power consumption by adjusting refresh operations based on real-time temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If refresh operations are performed frequently to maintain data integrity, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic refresh interval adjustment based on real-time temperature monitoring. The system transitions from static, fixed refresh intervals to dynamic intervals that adapt to temperature conditions. When temperature is high, refresh intervals are shortened to maintain data integrity; when temperature is low, intervals are extended to reduce power consumption. This dynamic adaptation resolves the contradiction by making the refresh operation frequency flexible rather than fixed.
Solution Approach 2:
The patent introduces a feedback mechanism where temperature sensor data is continuously monitored and fed back to the controller, which then adjusts refresh operations accordingly. The temperature information serves as feedback that triggers appropriate refresh interval modifications. This closed-loop feedback system enables the memory device to automatically balance between reliability and power consumption based on actual thermal conditions.
2Reliability
If refresh operations are performed more frequently, then data retention is improved, but performance deteriorates due to increased latency
Solution Approach 1:
The system dynamically adjusts refresh intervals based on temperature conditions rather than using a fixed schedule. Under normal temperature conditions, longer refresh intervals maintain data retention while minimizing interruptions to memory access operations. When temperature rises, the system automatically shortens intervals to preserve retention. This dynamic scheduling resolves the contradiction by making refresh operations more intelligent and less disruptive to performance.
Solution Approach 2:
The patent changes the temporal parameter of refresh operations based on temperature measurements. By adjusting the refresh interval parameter dynamically according to thermal conditions, the system optimizes the balance between data retention and access performance. This parameter adaptation allows the system to maintain reliability when needed while preserving productivity during normal operating conditions.
3Device complexity
If fixed refresh intervals are used, then device complexity is reduced, but adaptability to temperature changes deteriorates
Solution Approach 1:
The patent introduces a temperature sensor and controller as intermediary components between the physical temperature environment and the refresh operation control. This intermediary layer monitors temperature conditions and translates them into appropriate refresh interval adjustments. The intermediary mechanism adds minimal complexity while enabling significant temperature adaptability, resolving the contradiction by using a simple sensing and control interface.
Solution Approach 2:
The memory device performs self-monitoring of temperature conditions and autonomously adjusts refresh operations without external intervention. The integrated temperature sensor and control logic enable the device to self-regulate based on thermal conditions. This self-service capability provides temperature adaptability while keeping the overall system relatively simple, as the device manages its own optimization without requiring complex external control systems.
Data Source
AI summary
Providing temperature sensor data to a memory controller is described herein. An example system includes a memory apparatus comprising a memory device, a controller coupled to the memory device and configured to receive a temperature status of the memory device from a first register coupled to the memory device, determine whether the temperature status is above a threshold value, retrieve a temperature alert associated with the memory device when the temperature status is above a threshold value from a second register coupled to the memory device, retrieve a temperature sensor value associated with the memory device stored in a third register coupled to the memory device in response to retrieving the temperature alert, and set a refresh interval of the memory device based on the temperature sensor value retrieved from the third register.