Memory Controller Low-Temperature Mode for NAND Read Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-volatile memory devices, such as NAND Flash memory, experience read errors and performance issues in extremely cold environments due to large temperature differences between data programming and reading, which worsen with increased performance.
Innovation Solution
A low-temperature mode is introduced for memory controllers to execute preset idling operations, such as redundant read or arithmetic operations, to increase the temperature of memory devices and controllers, maintaining normal operation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-volatile memory devices operate in extremely cold environments, then the devices can function in cold conditions, but read errors and performance issues occur due to large temperature differences between data programming and reading
Solution Approach 1:
The memory controller performs preliminary heating actions by executing idle read commands before actual data read operations in cold environments. This preliminary action raises the memory device temperature to an acceptable range, preventing read errors that would occur due to the large temperature difference between programming and reading operations.
Solution Approach 2:
The system dynamically changes the temperature parameter of the memory device by controlling the execution of idle operations. When cold environment is detected, the memory controller increases the frequency or duration of idle read commands to raise the temperature, thereby changing the thermal state of the memory device to suitable operating conditions.
2Reliability
If the memory controller executes idle operations to increase temperature, then low-temperature performance improves, but additional operations increase power consumption and time overhead
Solution Approach 1:
The memory controller executes idle read commands at partial capacity rather than full capacity during low-temperature mode. This partial action provides sufficient heating effect to improve reliability while minimizing the additional power consumption and time overhead compared to executing operations at full capacity.
Solution Approach 2:
The system implements periodic temperature monitoring and conditional execution of idle operations. Rather than continuously executing idle commands, the controller periodically checks temperature conditions and only executes idle operations when cold temperature is detected, thereby reducing overall power consumption while maintaining reliability when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly improves low-temperature performance of non-volatile memory devices by narrowing the temperature difference between data reading and writing, ensuring reliable operation in cold conditions.
Implementation Method 1
control at least one of the memory device or the memory controller to execute a preset idling operation to increase the temperature associated with the memory device
Data Source
AI summary
In certain aspects, a memory system includes a memory device, and a memory controller coupled to the memory device. The memory controller is configured to enter a low-temperature mode based on a temperature associated with the memory device, and in the low-temperature mode, control at least one of the memory device or the memory controller to execute a preset idling operation to increase the temperature associated with the memory device.