Capacity expansion detection method of memory card and card reader with capacity expansion detection function

Abstract

The invention discloses a memory card capacity expansion detection method. Aiming at the current memory card capacity expansion method, comparison of sector memory capacity and register memory capacity, data writing and reading back of over-range addresses, and data writing of high-address range random addresses are adopted. A total of three-step detection of input and read-back is used to detect whether the memory card has been expanded. Only when the three-step detection is normal can it be judged as a normal memory card that has not been expanded, so as to realize accurate and effective expansion detection of the memory card. It also provides a card reader with expansion detection function to realize independent detection from the host, making expansion detection more convenient.

Description

Technical field [0001] The invention belongs to the technical field of memory cards, and more specifically, relates to a memory card expansion detection method and a card reader with expansion detection function. Background technique [0002] Memory card expansion is a profit-making method often used by copycat memory card manufacturers, but there is currently a lack of independent devices on the market that specifically detect the quality of memory cards. Consumers can only use some software on the Windows operating system to identify the quality of memory cards. , The dependence on the operating system is strong, and the operation process is slow, which is easy to cause crashes; the test results can only be obtained after the memory card is purchased, and the test is of little significance. At present, most of the detection software on the market scans and detects in a certain increasing order. This gives some unscrupulous merchants the opportunity to use this increasing order ...

AI Technical Summary

Problems solved by technology

[0002] Memory card expansion is a profit-making method often used by counterfeit memory card manufacturers, but there is currently no independent device for detecting the quality of memory cards on the market. Consumers can only use some software on the Windows operating system to identify the quality of memory cards. , has a strong dependence on the operating system, and the operation process is slow, which can easily lead to crashes; the test results can only be obtained after purchasing the memory card, and the test is of little significance

Most of the detection software currently on the market scans and detects in a certain increasing order. In this way, it gives some unscrupulous merchants the opportunity to use this increasing order to make expansion memory cards and use the reputation of large companies to sell inferior expansion memory cards.

[0003] At the same time, during the use of the memory card, due to improper use, the memory card will be damaged to varying degrees. When such a memory card is formatted, the computer will become slow to respond, especially when there is a problem with the file system of the memory card. , the computer may appear "stuck" phenomenon, and "Window cannot complete the format" problem

At present, the card readers used by everyone only have the function of reading and writing, and there is a lot of room for appreciation

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