Memory card supporting near field communication through single wire protocol

Abstract

A memory card supporting near field communication through single wire protocol includes a power management unit, an interface control unit, a data storage unit, a power protection unit and an intelligent unit. The power protection unit is interposed between the power management unit and a near field voltage source of the near field communication unit to prevent short-circuit induced by direct connection there between. Moreover, direct connection between the power management unit and the intelligent unit can also be prevented, which can protect against bursts of excessive voltages or currents that may damage the data in the intelligent unit. Additionally, the power protection unit can prevent power leakage from the power management unit and the near field voltage source, which solves the problem of improperly driving near field communication or insufficient power supply to the interface control unit or intelligent unit.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a memory card used in near field communication through single wire protocol (SWP), and more particularly to a memory card that includes a power protection unit that prevents short-circuits and power leakage between a power management unit and the SWP connection points.[0003]2. The Prior Arts[0004]Mobile phones are widely used electronic devices. As technology advances, the mobile phone is provided with more functions such as voice recording, video recording, photo shoot, etc. To accommodate the increasing functions, adequate memory cards are also required for data storage in the mobile phone.[0005]Digital wallets are also becoming increasingly popular, such as debit cards used for small amount payments. The debit card uses magnetic induction to proceed to near field communication. In particular, the card can include a chip that may be powered by an external near field communication devic...

AI Technical Summary

Benefits of technology

The present invention provides a memory card that supports near field communication through the Single Wire Protocol (SWP) for use in near field communication devices. The memory card includes a power management unit, interface control unit, data storage unit, power protection unit, and intelligent unit. The power management unit receives power from the memory card and the device's power source and controls the interface control unit. The interface control unit controls the data input / output interface and receives the execute instruction from the data storage unit. The data storage unit is a flash memory for storing data. The power protection unit prevents short-circuit and power leakage between the power management unit and the near field voltage source. The intelligent unit receives signals from the near field communication device and encrypts / decrypts them for secure communication. The memory card can be used in various devices like mobile phones, cameras, multimedia players, and tablet computers, and its design prevents damage to the data.

Problems solved by technology

However, banks cannot write personalized data in the SWP SIM card.

However, the voltage supply of the memory card is usually connected directly with the power source of the electronic product, which may result in the near field communication chip being easily connected directly with the voltage source.

As a result, short-circuits may occur, which may damage secure data and even damage the memory card or electronic product.

Moreover, because the near field communication chip and the power source of the electronic product are directly conducting, power leakage may happen, which results in insufficient driving power and incapability of driving the near field communication or the memory card.

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