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Near field communication system

A near-field communication and power supply device technology, applied in near-field transmission systems, near-field transmission systems using capacitive coupling, transmission systems, etc., can solve problems such as low data density, high price, and large size of non-volatile memory

Inactive Publication Date: 2013-10-02
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, non-volatile memory has disadvantages such as large size and high price
Electrically Erasable Programmable Read-Only Memory is usually much larger in size than general volatile memory, and its data density is also very low
In addition, flash memory requires additional masks and special processes, which are also expensive
Today, in advanced processes (for example: 40nm, 65nm process), there is still no mature non-volatile memory solution, so the development of near field communication systems in advanced processes has encountered many problems

Method used

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Embodiment Construction

[0013] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0014] figure 1 A schematic diagram of a near field communic...

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Abstract

An NFC (Near Field Communication) system is provided in the invention. The NFC system includes a power source, a capacitor, and a memory device. The capacitor is charged by the power source; the NFC controller includes an independent power domain; the independent power domain of the NFC controller is supplied by the power source and / or the capacitor; a memory device is disposed in the independent power domain configured to maintain data. When the power source is removed therefrom or turned off, the independent power domain is supplied by the capacitor. According to the NFC system, the data in the memory device can be maintained to perform normal access operation even the power source is removed or turned off.

Description

technical field [0001] The present invention relates to a near field communication (Near Field Communication, NFC) system, and more particularly to a near field communication system including a storage device, wherein the near field communication system can still function normally even when the power device is removed or turned off to operate. Background technique [0002] In the near field communication system, the near field communication controller can be used as an electronic card (for example: the emulation card mode Card Emulation Mode specified by the NFC Forum), which has a variety of applications, such as: mass rapid transit (Metro passing), bank and so on. NFC controllers generally require non-volatile memory (Non-Volatile Memory, NVM) to store important data, so that even when the power supply device of the NFC system is removed or turned off, the data can still be accessed normally. [0003] Generally speaking, non-volatile memory often adopts Electrically Eras...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/26
CPCH04B5/22H04B5/79
Inventor 魏睿民周书弘
Owner MEDIATEK INC