Storage Address Switching for Stable Low-Power Wake-Up
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices face instability and deadlock issues during power mode transitions due to noise interference in the detection of wake-up events, particularly when multiple storage devices trigger wake-up events simultaneously or within short time intervals, leading to inconsistent activation of function blocks.
Innovation Solution
A method and device design where the storage device changes its input address to indicate the intention to exit a low-power mode by providing negative acknowledge responses, allowing the host device to detect this intention through additional read requests, thereby avoiding direct electrical signal conflicts and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the storage device uses direct electrical signal detection for wake-up events, then the response speed is fast, but noise interference causes instability and deadlock issues during power mode transitions
Solution Approach 1:
The patent introduces an intermediary mechanism where the storage device changes its address in the internal memory device to signal wake-up intention, rather than using direct electrical signals. The host device reads this address change as a wake-up indication, eliminating noise interference while maintaining response capability.
Solution Approach 2:
The patent replaces the electrical signal-based wake-up detection mechanism with an address-based communication mechanism. Instead of detecting electrical signal changes that are susceptible to noise, the system uses memory address reads/writes to convey wake-up intentions, thereby improving reliability.
2Productivity
If multiple storage devices trigger wake-up events simultaneously, then the system responsiveness is improved, but noise interference causes inconsistent activation of function blocks
Solution Approach 1:
The address change mechanism serves as a reliable intermediary that multiple storage devices can use simultaneously without electrical signal conflicts. Each device can independently change its address to signal wake-up, and the host device reads these address changes consistently, ensuring reliable function block activation even under concurrent operations.
3Reliability
If the storage device changes address to indicate wake-up intention, then noise-related errors are reduced, but additional read requests are required to detect the intention
Solution Approach 1:
The storage device performs preliminary action by changing its address before actually activating function blocks. This address change serves as an advance notification to the host device, allowing the host to prepare for wake-up in a timely manner without requiring complex real-time detection mechanisms.
Data Source
AI summary
A method of operating a storage device includes receiving a second power supply voltage among a first power supply voltage and the second power supply voltage from a host device, driving a logic circuit and an internal memory device of the storage device, based on the second power supply voltage, changing an input address of the internal memory device from a first address to a second address, receiving a first read request corresponding to the first address from the host device, providing a negative acknowledge response to the host device based on the first read request, after providing the negative acknowledge response, receiving a second read request corresponding to the second address from the host device, providing a positive acknowledge response to the host device based on the second read request, and after providing the positive acknowledge response, receiving the first power supply voltage from the host device.