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RFID (Radio Frequency Identification Device) anti-power-down NVM (Non-Volatile Memory) data storage device and a storage method thereof

A data storage device and anti-power-off technology, which is applied to the record carrier used by the machine, the generation of response errors, and instruments, etc., can solve the problems of low data writing efficiency and shorten the life of NVM, so as to improve application performance and save operation time Effect

Pending Publication Date: 2019-06-11
广东中成卫星微电子发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this method, it is necessary to write 4 times and erase twice for a safe update of data, resulting in low efficiency of writing data
Moreover, every time data is written, the backup area needs to be written and erased once, and the number of erasing and writing of the backup area will be large, which will greatly reduce the life of NVM

Method used

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  • RFID (Radio Frequency Identification Device) anti-power-down NVM (Non-Volatile Memory) data storage device and a storage method thereof
  • RFID (Radio Frequency Identification Device) anti-power-down NVM (Non-Volatile Memory) data storage device and a storage method thereof
  • RFID (Radio Frequency Identification Device) anti-power-down NVM (Non-Volatile Memory) data storage device and a storage method thereof

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Embodiment Construction

[0037] The present invention will be described in further detail below through examples, and the following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0038] like figure 1 As shown, a kind of RFID anti-power-off NVM data storage device of the present invention includes two storage areas, and the two storage areas are mapped to the same logical address (it can be simply regarded as one storage area is the backup of another storage area) , and each storage area is set into three parts according to the NVM page size: a data area, an indicator bit and a parity bit.

[0039] The two storage areas are physically independent. Or the two storage areas are logically independent.

[0040] When leaving the factory, the initialization information is written into the two storage areas to ensure that the data area and the indicator bit can be verified to be consistent with the check bit by the check algorithm.

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Abstract

The invention discloses an RFID (Radio Frequency Identification Device) power failure prevention NVM (Non-Volatile Memory) data storage device and a storage method thereof, and the device comprises two storage areas, the two storage areas are mapped into the same logic address, and each storage area is set into a data area, an indication bit and a check bit according to the size of an NVM page. When the data are read and written, the data in the two storage areas are read and compared, whether the data are new or old is judged, and the data are read and written according to the judgment result. According to the method, only one NVM writing operation is needed for data updating each time, so that the operation time is greatly saved, and the application performance of the RFID products is improved.

Description

technical field [0001] The invention relates to a data storage device and a storage method thereof, in particular to an RFID power-down preventing NVM data storage device and a storage method thereof. Background technique [0002] RFID with non-volatile memory is widely used in logistics tracking, anti-counterfeiting traceability and other fields. The RFID product itself is a passive device, which relies on electromagnetic waves to obtain energy to enable the chip to work normally. During the working process, if a power failure or other unpredictable errors occur, resulting in data erasure or abnormal termination of the data writing process, the writing process will be interrupted. Incorrect data, thus seriously compromising data integrity and security. Therefore, a solution is needed to complete the data power-off protection problem. [0003] At present, the problem of power failure protection is generally solved by using the backup area, that is, to apply for a backup ar...

Claims

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Application Information

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IPC IPC(8): G06K19/077G06F11/10
Inventor 赵海彤樊小军
Owner 广东中成卫星微电子发展有限公司
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