Non-Volatile Memory Power Loss Control via Background Operation Management
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Solution Overview
Problem
Existing electronic devices face data integrity and reliability issues due to interruptions in background operations caused by uncontrolled power loss, particularly in non-volatile memory devices that perform tasks like memory array refresh and wear-leveling algorithms.
Innovation Solution
Implementing a method to issue a controlled power off command that safely suspends or completes background operations in non-volatile memory devices, allowing for resumed operations upon power restoration, using a status register unit and command interface to manage power removal and resumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uncontrolled power loss occurs in non-volatile memory devices, then power supply removal is immediate, but background operations are interrupted and data integrity is compromised
Solution Approach 1:
The patent applies preliminary action by checking the status of background operations before removing power. The controller detects whether background operations are ongoing and suspends them before power removal occurs, preventing data integrity issues while managing power control systematically
Solution Approach 2:
The patent implements feedback by continuously monitoring the status register unit to detect background operation states. This feedback mechanism allows the controller to make informed decisions about power removal timing, ensuring background operations are properly suspended before power loss to maintain data integrity
2Reliability
If background operations are suspended before power removal, then data integrity is maintained, but power loss control complexity increases
Solution Approach 1:
The patent applies self-service by enabling the non-volatile memory device to autonomously suspend its own background operations when power removal is detected. The device monitors its own status register unit and self-manages the suspension of background tasks without requiring complex external control systems
Solution Approach 2:
The patent merges the power management functionality with the existing status register unit and command interface of the non-volatile memory device. By combining these functions into existing structural elements rather than adding separate complex control systems, the patent maintains memory reliability while minimizing increases in device complexity
Data Source
AI summary
Described herein are methods and devices for controlling power loss. For one embodiment, a method includes issuing a controlled power off command with a controller. The method includes determining whether a memory device is performing a background operation. The method includes safely suspending the background operation or completing the background operation if the memory device is performing the background operation. The method includes safely removing a supply power.