Memory Device Emergency Data Storing Operation Selection
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Solution Overview
Problem
Current memory devices lack the ability to selectively control which emergency storing operation to perform based on a low battery condition or a power loss condition, such as through detection of a power loss notification signal.
Innovation Solution
The memory device is configured to select between emergency power fail (EPF) and forced quiescence (FQ) operations based on the detection of a peripheral component interconnect power loss notification (PLN) signal and a peripheral component interconnect express reset (PERST) signal, allowing it to store data and metadata prior to a power loss when sufficient time is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory device performs the emergency power fail (EPF) operation to store data prior to power loss, then data integrity is improved, but boot-up time increases
Solution Approach 1:
The memory device dynamically selects between EPF and FQ operations based on real-time detection of PLN signal edges. The system transitions from a static emergency storing approach to a dynamic one where the operation type changes according to whether this is the first or second detection of the power loss condition, thereby optimizing between data integrity and boot-up time based on actual power loss patterns
Solution Approach 2:
The invention changes the operational parameter of the memory device by switching between two distinct emergency storing modes (EPF and FQ) based on the detection count of the PLN signal. This parameter change allows the system to adapt its data storing behavior to minimize boot-up time while maintaining data integrity when necessary
2Reliability
If the memory device repeatedly performs emergency storing operations, then data protection is improved, but power consumption increases
Solution Approach 1:
The memory device employs dynamic operation selection based on the number of times the power loss condition is detected. By switching from EPF to FQ operation on the second detection, the system dynamically adjusts its power consumption profile while maintaining data protection, avoiding repeated high-power operations
Solution Approach 2:
The memory device uses its own internal detection mechanism to monitor power loss conditions and automatically selects the appropriate emergency storing operation without external intervention. The system serves itself by detecting the PLN signal edges and autonomously deciding between EPF and FQ operations based on the detection count
Data Source
AI summary
Implementations described herein relate to emergency data storing operation selection. In some implementations, a memory device may be configured to receive a peripheral component interconnect power loss notification (PLN) signal and a peripheral component interconnect express reset (PERST) signal. The memory device may be configured to determine whether to initiate a first data storing operation or a second data storing operation based on the PERST signal state based on a falling edge of the PLN signal. The memory device may be configured to selectively initiate the first data storing operation or the second data storing operation. The first data storing operation may include storing data associated with the memory device prior to the memory device experiencing a power loss, and the second data storing operation may include storing data and metadata associated with the memory device prior to the memory device experiencing the power loss.