Patent ID: 8381996
Filing Date: 2013-02-26
Classification: G06K

Abstract:
1. A memory card supporting near field communication through single wire protocol, the memory card being suitable for use with a near field communication device having a memory card connection port and a near field communication unit, the memory card comprising: a power management unit connected with a memory card voltage source of the near field communication device to receive a voltage from the memory card connection port; an interface control unit connected with the power management unit and a memory card data input/output interface, wherein the interface control unit is powered by the power management unit, inputs data from and output data to the memory card data input/output interface, and outputs an execute instruction; a data storage unit, being 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; a power protection unit electrically connected with the power management unit and a near field voltage source of the 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; and an intelligent unit connected with the power protection unit and a single wire protocol input/output interface, the intelligent unit being powered by the power protection unit and connected with the near field communication unit through the single wire protocol, wherein the intelligent unit receives a signal from the external near field communication device, is connected with the interface control unit, receives an instruction from the memory card data input/output interface, is an encrypt/decrypt circuit, and encrypts and decrypts the instruction of inputting or reading data from the single wire protocol input/output interface or the data inputted to or read from the interface control unit to prevent transaction data from being stolen.