Memory Device Voltage Variation Detection and Status Update
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Solution Overview
Problem
Storage devices face challenges in maintaining data integrity and reliability due to voltage variations during operations, which can lead to sudden power-offs and data corruption, especially in flash memory devices like NAND flash memory.
Innovation Solution
Incorporating a voltage variation detector, power register, status register, and register output controller within the memory device to monitor and manage supply voltage variations, store voltage variation information, and update status information accordingly, allowing the memory controller to determine operation failures and re-perform operations as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage variation detection and status update mechanisms are added to the memory device, then data reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the voltage variation detection function with the existing memory device structure by integrating a voltage variation detector, power register, status register, and register output controller into the memory device. This combination allows the memory device to autonomously monitor voltage variations and update status information without requiring external complex monitoring systems, thereby improving data reliability while controlling the increase in device complexity through functional integration.
2Reliability
If voltage variation information is stored and status information is updated based on voltage variations, then operation reliability is improved, but measurement and detection difficulty increases
Solution Approach 1:
The memory device performs self-monitoring of voltage variations through the integrated voltage variation detector and stores the detected information in the power register. The status register automatically updates based on the stored voltage variation information without requiring external measurement systems. This self-service approach simplifies the detection and measurement process while ensuring operation reliability, as the memory device independently tracks and reports its own operational status under varying voltage conditions.
Data Source
AI summary
Provided herein may be a storage device and a method of operating the storage device. A memory device may include a memory cell array including a plurality of memory cells, a peripheral circuit configured to perform an operation on memory cells selected from among the plurality of memory cells, a voltage variation detector configured to generate voltage variation information indicating whether a voltage variation has occurred in a supply voltage during performance of the operation, a power register configured to store the voltage variation information, a status register configured to store status information indicating an operating status of the memory device, and a register output controller configured to update the status information provided from the status register based on the voltage variation information.