NFC Memory Card Wireless Data Transfer via Induction
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Solution Overview
Problem
Existing memory cards lack the ability to efficiently transfer and store data from Near Field Communication (NFC) transactions without a power source, limiting their functionality when inserted into non-NFC supported host devices and when not inserted into a card slot.
Innovation Solution
A memory card design incorporating a NAND-type flash memory, NFC controller, and EEPROM, which enables data transfer and storage through NFC communication, utilizing induced electromotive force from a magnetic field for operation without a power source, allowing data to be written to and read from the EEPROM and subsequently stored in the NAND memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the memory card uses NFC communication to transfer data without a power source, then data transfer capability is improved, but the complexity of the memory card system increases
Solution Approach 1:
The memory card integrates multiple functions including NFC communication for wireless data transfer, traditional card slot insertion for wired access, and automatic data transfer capabilities. This multi-functionality allows the same device to operate in various scenarios (with or without card slot, with or without power source), resolving the contradiction by making the system adaptable without requiring separate devices for each function.
Solution Approach 2:
The memory card automatically detects when data needs to be transferred via NFC and initiates the transfer process without requiring manual intervention or external power source. The system self-manages the data transfer process by detecting the presence of a host device and automatically copying data from the host's memory to the memory card, eliminating the need for complex user operations while maintaining functionality.
2Ease of operation
If the memory card stores data in EEPROM for temporary storage, then data accessibility is improved, but the storage capacity is limited
Solution Approach 1:
The memory card divides its storage into two distinct segments: EEPROM for temporary, frequently accessed data and NAND flash memory for long-term, high-capacity storage. This segmentation allows the system to maintain fast access for critical data in EEPROM while providing extensive storage capacity in NAND memory, resolving the contradiction between accessibility and capacity by using different storage technologies for different purposes.
Solution Approach 2:
The system performs preliminary data transfer from the host device to the EEPROM during NFC communication, preparing data for subsequent storage in the NAND memory. This preliminary action in EEPROM allows the memory card to quickly receive and buffer data before transferring it to the larger NAND storage, improving overall data accessibility while utilizing the full storage capacity of the NAND memory for long-term retention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables seamless data transfer and storage from NFC transactions, even without a power source, ensuring compatibility with both NFC and non-NFC devices and allowing temporary data storage without the need for a card slot, enhancing the memory card's functionality and user experience.
Implementation Method 1
a nonvolatile first memory, a nonvolatile second memory having a larger capacity than the first memory, a first controller, and a second controller. The first controller writes, to the first memory, data received over a short-range radio communication by using the power generated in the short-range radio communication
Implementation Method 2
data received over a short-range radio communication by using the power generated in the short-range radio communication
Data Source
AI summary
According to an embodiment, a memory device includes a nonvolatile first memory, a nonvolatile second memory, a first controller, and a second controller. The first controller is configured to write, to the first memory, data received over a short-range radio communication by using power generated in the short-range radio communication. The second controller is configured to execute, at a startup of the memory device, a transfer process of reading a file written in the first memory and storing the read file to the second memory.