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

[0009]An aspect of the present invention is to provide a memory card supporting near field communication through the Single Wire Protocol (SWP). The memory card is mainly used in a near field communication device, such as a mobile phone, a camera, a multimedia player, a tablet computer, etc. The memory card comprises a power management unit, an interface control unit, a data storage unit, a power protection unit and an intelligent unit. The power management unit is connected with a memory card voltage source of the near field communication device to receive a voltage from the memory card connection port. The interface control unit is connected with the power management unit and a memory card data input / output interface, wherein the interface control unit is supplied with power from the power management unit, receives data input and output from the memory card data input / output interface, and outputs an execute instruction. The data storage unit is a flash memory to store data, the data storage unit being connected with the interface control unit to receive the execute instruction for reading, writing and erasing data. The power protection unit is electrically connected with the power management unit and a near field voltage source of a near field communication unit, thereby preventing short-circuit induced by direct connection between the power management unit and the near field voltage source, and power leakage from the near field voltage source or the power management unit. The intelligent unit is connected with the power protection unit and a single wire protocol input / output interface. The intelligent unit is supplied with power from the power protection unit and is connected with the near field communication unit through the single wire protocol, wherein the intelligent unit receives a signal from an external near field communication device, is connected with the interface control unit, receives an instruction from the memory card data input / output interface, and encrypts / decrypts the instruction inputted or read from a single wire protocol input / output interface or the interface control unit to prevent transaction data from being stolen.

[0011]The memory card described herein can have a Micro-SD standard size format, which can be used in a near field communication device such as mobile phones, cameras, multimedia players, tablet computers, etc. Because the power protection unit is interposed between the power management unit and the near field voltage source of the device, the occurrence of short-circuit due to direct electric connection can be prevented. 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.

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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