Method for setting operation frequency of storage card and related card reading device

A technology of operating frequency and card reading device, which is applied in the direction of instruments, inductive record carriers, computer components, etc., can solve the problems of electromagnetic interference, high power consumption of memory cards, and failure to achieve access performance, so as to reduce electromagnetic interference, The effect of reducing power consumption

Inactive Publication Date: 2011-08-10
JMICRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the latest specification for secure digital memory cards is SDA3.0 published by the Secure Digital Memory Card Association (SD Card Association). The frequency of 50MHz is four times higher. Although the higher operating frequency makes the memory card have better access performance, operating at high frequency will also bring higher power consumption and electromagnetic interference (EMI) to the memory card. Phenomenon
In addition, in some cases, if the secure digital memory card conforming to the SDA2.0 specification only works at the maximum operating frequency of 50MHz specified by SDA2.0, it may not be able to achieve its best access performance. Better memory card access performance can be obtained by properly performing frequency up (that is, overclocking) operations within the allowable range of the memory card

Method used

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  • Method for setting operation frequency of storage card and related card reading device
  • Method for setting operation frequency of storage card and related card reading device
  • Method for setting operation frequency of storage card and related card reading device

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Embodiment Construction

[0010] Please refer to figure 1 , figure 1 It is a schematic diagram of the card reading device 100 in an embodiment of the present invention. The card reading device 100 is used for accessing at least one memory card 101 and includes (but not limited to) a storage device 110 and a processor 120 . The storage device 110 stores a program code C, and the processor 120 is coupled to the storage device 110 to execute the program code C and perform the following steps: execute an operating frequency adjustment process to select a target operating frequency F target ; and using the target operating frequency F target to set the operating frequency F of the memory card 101 operate . The steps of performing the operation frequency adjustment process include: selecting a plurality of candidate operation frequencies F candidate1 ~F candidateN ; Test memory card 101 at candidate operating frequency F candidate1 ~F candidateN Access performance when running down to generate multip...

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Abstract

The invention relates to a method for setting an operation frequency of a storage card and a related card reading device. The method comprises the following steps: carrying out an operation frequency adjustment flow so as to select an objective operation frequency; and using the objective operation frequency to set the operation frequency of the storage card. The step of carrying out the operation frequency adjustment flow comprises: selecting a plurality of candidate operation frequencies; testing the access efficiency of the storage card when the storage card operates in the plurality of candidate operation frequencies so as to respectively generate a plurality of testing results; and selecting one of the plurality of candidate operation frequencies as the objective operation frequency according to the plurality of testing results.

Description

technical field [0001] The invention relates to a method for setting a memory card and a related card reading device, in particular to a method for setting the operating frequency of a memory card and a related card reading device. Background technique [0002] A data storage device is an indispensable part of a computer system, and there are quite a variety of types depending on the function. As the volume of data storage devices is continuously reduced, various portable data storage devices, such as flash memory cards and external hard drives, appear on the market. In view of the convenience of use, and considering that these data storage devices often need to be processed by computer systems, many external interface devices that are convenient for connecting these data storage devices have been developed, so that the computer system can be externally connected. Access these data storage devices simply and quickly, and these external access devices usually support several...

Claims

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Application Information

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IPC IPC(8): G06K7/00
Inventor 许家荣赖昆彬巫启台
Owner JMICRON
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