Dynamic PCIe Interface Mode Switching for Memory Card Power Management
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Solution Overview
Problem
Memory card readers often consume excessive power and generate high operating temperatures due to using the highest bandwidth and maximum channels for all memory cards, regardless of their speed, which is inefficient and potentially hazardous.
Innovation Solution
A memory card reading method that detects the specification information of the memory card, including its transfer speed, and adjusts the reader-to-host interface to operate in a specific mode corresponding to the card's speed, dynamically switching modes based on the device's status to optimize power usage and temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the PCIe interface uses the highest bandwidth and maximum number of channels for reading all memory cards, then the data transfer speed is maximized, but the power consumption increases and operating temperature rises
Solution Approach 1:
The patent implements dynamic adjustment of the PCIe interface operating mode based on the detected memory card reading speed. The system switches between different operating modes (e.g., GEN3 8Gbps vs GEN1 2.5Gbps) to match the actual data transfer requirements, avoiding continuous operation at maximum bandwidth and thereby reducing power consumption while maintaining adequate transfer speeds
Solution Approach 2:
The system changes the operating parameters of the PCIe interface by detecting the memory card's reading speed capability and selecting an appropriate operating mode accordingly. This parameter adjustment allows the interface to operate at lower bandwidth levels when high-speed memory cards are not connected, thus reducing power consumption and heat generation
2Speed
If the PCIe interface uses the highest bandwidth and maximum number of channels for reading all memory cards, then the data transfer speed is maximized, but the operating temperature increases
Solution Approach 1:
The system dynamically adjusts the PCIe interface operating mode based on the detected memory card reading speed. By switching between different operating modes (e.g., GEN3 8Gbps vs GEN1 2.5Gbps) to match actual data transfer requirements, the system avoids continuous operation at maximum bandwidth, thereby reducing heat generation and operating temperature while maintaining adequate transfer speeds
Solution Approach 2:
The system changes the operating parameters of the PCIe interface by detecting the memory card's reading speed capability and selecting an appropriate operating mode. This parameter adjustment allows the interface to operate at lower bandwidth levels when high-speed memory cards are not connected, thus reducing power consumption and heat generation
Data Source
AI summary
A memory card reading method applied to an electronic device, includes: detecting a specification information of a memory card, wherein the specification information includes a transfer speed of the memory; and controlling according to the specification information a reader to host interface to operate in a first operating mode or a second operating mode for reading the memory card, wherein the first operating mode and the second operating mode correspond to different data transfer speeds.