Memory Card Slot Write Protection via Pin Orientation
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Solution Overview
Problem
Existing memory card write-protection mechanisms, such as sliding switches, are prone to loosening or failure, leading to unreliable read-only states and manufacturing issues with gaps between protection cases, necessitating a more stable and convenient method.
Innovation Solution
An access apparatus with a slot featuring two supply voltage pins, where the memory card is selectively connected to either pin based on its facing direction, determining whether to allow or prohibit write operations, eliminating the need for a physical switch and enhancing protection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding write-protection switch is used, then write protection can be implemented, but the switch is prone to loosening or falling off after frequent sliding
Solution Approach 1:
The invention extracts the write-protection function from the physical sliding switch and relocates it to the access apparatus through electrical connection detection. The memory card itself remains unchanged, while the access apparatus uses two supply voltage pins to detect the write-protection state, eliminating the fragile sliding switch component.
Solution Approach 2:
The invention replaces the mechanical sliding switch system with an electrical detection system. Instead of physically sliding a switch that can loosen or fall off, the system uses electrical connections between supply voltage pins to detect and control write-protection status, substituting mechanical operation with electrical signal-based control.
2Reliability
If a sliding write-protection switch is used, then write protection can be implemented, but gaps between protection cases occur during manufacturing
Solution Approach 1:
The invention extracts the write-protection functionality from the memory card's physical structure and relocates it to the access apparatus. This eliminates the need for complex packaging processes to seal gaps between protection cases, as the write-protection state is now determined by electrical connections rather than physical case sealing.
Solution Approach 2:
The invention introduces an intermediary detection mechanism in the access apparatus that mediates between the memory card and the user. Instead of relying on physical case gaps to indicate write-protection status, the access apparatus uses electrical detection as an intermediary to determine the actual write-protection state, simplifying manufacturing.
3Ease of operation
If a sliding write-protection switch is used, then write protection can be implemented, but frequent sliding causes the switch to loosen or fall off
Solution Approach 1:
The invention replaces the mechanical sliding switch with an electrical detection system in the access apparatus. Users no longer need to physically slide a switch that can loosen or fall off; instead, the system automatically detects the write-protection state through electrical connections between supply voltage pins, eliminating mechanical wear and stability issues.
Data Source
AI summary
An access apparatus for memory card and a control method thereof are provided. The access apparatus is adapted for receiving a memory card with a side having a supply voltage pin and includes a slot module. The slot module includes a slot having a first side and a second side corresponding to each other. The first side and the second side are respectively configured with a first supply voltage pin and a second supply voltage pin, and the first supply voltage pin and the second supply voltage pin are spaced apart and opposite to each other. The access apparatus selectively determines whether to forbid performing a write operation to the memory card according to a conduction status of the first supply voltage pin and the second supply voltage pin with the supply voltage pin caused by a facing direction of the memory card inserted in the slot.