Non-Volatile Memory Power Management via State Signal Coordination
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Solution Overview
Problem
In portable communication devices with flash memory, increased workload on the CPU and high maximum instantaneous power consumption lead to potential errors due to power supply issues, and scaling up non-volatile memory devices can decrease data processing speed due to increased loading capacitance.
Innovation Solution
A method where each non-volatile memory device controls its operation or non-operation based on a state signal, with a power management control circuit generating and transmitting this signal to other devices to manage power usage and determine the order of operations, ensuring only a specified number of devices operate simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple non-volatile memory devices operate simultaneously to increase data processing performance, then productivity is improved, but power consumption increases and may cause power supply errors
Solution Approach 1:
The power management control circuit receives operation indication signals from non-volatile memory devices, counts the number of operating devices, compares the count with a reference value, and generates state signals fed back to control the operation of memory devices based on the comparison result, thereby dynamically adjusting power consumption according to actual operational needs
Solution Approach 2:
Non-volatile memory devices autonomously determine their operation or non-operation based on state signals received from other memory devices, enabling self-regulation of power consumption without requiring centralized control, thus improving both power efficiency and data processing performance
2Productivity
If the number of non-volatile memory devices increases to enhance data processing performance, then productivity is improved, but loading capacitance of the interface increases and data processing speed decreases
Solution Approach 1:
A dedicated channel serves as an intermediary communication path between non-volatile memory devices, allowing them to exchange state signals and coordinate operations independently of the main data interface, thereby preventing interface loading capacitance from increasing while still enabling multiple devices to operate simultaneously
Solution Approach 2:
The communication interface is segmented into a main data interface and a separate dedicated control channel, allowing state signal transmission to occur independently from data transfer operations, thus avoiding increased loading capacitance on the main interface while enabling coordinated operation of multiple memory devices
3Productivity
If simultaneous operations on flash memory devices occur to increase data processing performance, then productivity is improved, but maximum instantaneous power consumption increases
Solution Approach 1:
The power management control circuit dynamically adjusts the number of simultaneously operating memory devices by receiving operation indication signals, counting active devices, comparing with reference values, and generating appropriate state signals to control operation timing, thereby optimizing power consumption based on real-time operational conditions
Solution Approach 2:
Non-volatile memory devices operate in periodic batches rather than all simultaneously, with operation timing determined by state signals that coordinate periodic operation cycles, thus reducing peak power consumption while maintaining overall data processing performance through distributed periodic operations
Data Source
AI summary
A method of operating a data storage device configured to allow a plurality of non-volatile memory devices, including a first non-volatile memory device and second non-volatile memory devices, to lead control of power consumption. The method includes receiving, by each of the second non-volatile memory devices, a state signal indicating operation or non-operation of the first non-volatile memory device and determining, by each of the second non-volatile memory device, whether to operate based on the state signal.