Memory System Power Mode Transition Latency
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Solution Overview
Problem
Memory systems experience increased latency and power consumption when transitioning from hibernate mode to low power mode due to the need for intermediate active mode operations, which can impair read, write, and erase speeds and overall performance.
Innovation Solution
The memory system detects a pattern indicating an impending transition to low power mode and performs necessary power management operations after receiving a synchronization cache command but before the command to enter low power mode, thereby reducing latency and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory system transitions from hibernate mode to low power mode through intermediate active mode operations, then the memory system can perform necessary power management operations, but the latency increases and read, write, and erase speeds deteriorate
Solution Approach 1:
The memory system detects a pattern indicating an impending transition to low power mode and performs necessary power management operations (flush operation, deactivation of first and second portions) after receiving a synchronization cache command but before the command to enter low power mode. This preliminary action completes required operations in advance, eliminating the need for intermediate active mode transitions and reducing transition latency while maintaining reliable power management operation completion
2Reliability
If the memory system performs power management operations during intermediate active mode transitions, then power management can be completed, but power consumption increases
Solution Approach 1:
The memory system performs power management operations (flush operation, deactivation of first and second portions) in advance before the command to enter low power mode is received. By completing these operations preliminarily, the system avoids the need to activate and deactivate components during intermediate transitions, thereby reducing overall power consumption while ensuring reliable power management operation completion
Solution Approach 2:
The memory system maintains continuous operation by performing power management operations during the idle period before transition, rather than interrupting operations for intermediate active mode transitions. This continuous approach eliminates redundant activation and deactivation cycles, reducing power consumption while maintaining complete power management operation functionality
3Reliability
If the memory system uses intermediate active mode operations for transition, then power management can be performed, but overall performance and processing speeds deteriorate
Solution Approach 1:
The memory system performs power management operations (flush operation, deactivation of first and second portions) in advance during the idle period before the command to enter low power mode is received. This preliminary completion of operations eliminates the need for intermediate active mode transitions, thereby maintaining high processing speeds and overall performance while ensuring reliable power management operation completion
Data Source
AI summary
Methods, systems, and devices for power management techniques are described. A memory system may receive a command to exit a first power mode and enter a second power mode. The first power mode may have a lower power consumption than the second power mode. The memory system may determine whether a duration of an idle period associated with the first power mode satisfies a threshold based on receiving the command to exit the first power mode. The memory system may receive another command associated with executing a flush operation and perform one or more power management operations based on receiving the command and determining that the duration satisfies the threshold.