Read parameter selection method and apparatus

A technology of reading parameters and selecting modules, which is applied in the field of selecting and reading parameters, can solve problems such as system crashes and unreasonable selection of reading parameters, and achieve the effect of solving system crashes

Active Publication Date: 2017-03-08
LEADCORE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The problem solved by the present invention is to provide a method and device for selecting read parameters, which can correctly and effectively select the read parameters of the memory, and can solve the problem of system crash caused by unreasonable selection of read parameters

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  • Read parameter selection method and apparatus
  • Read parameter selection method and apparatus
  • Read parameter selection method and apparatus

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0036] The first embodiment of the present invention relates to a method for selecting read parameters, the specific process is as follows Figure 7 shown, including the following steps:

[0037] Step 701, select the wrong read parameter through CMD21 (the 21st command). In this step, select the wrong read parameter throug...

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Abstract

The invention relates to the technical field of electronic devices and discloses a read parameter selection method and apparatus. The read parameter selection method comprises the following steps of reducing an output driving capability of a memory and an application processor; performing a data read operation on the memory, selecting out a wrong read parameter, and if the wrong read parameter cannot be selected out, continuing to reduce the output driving capability of the memory and the application processor until the wrong read parameter is selected out, wherein a clock signal corresponding to the wrong read parameter is a first clock signal; and selecting a read parameter of a sampling point corresponding to a second clock signal in a sampling period of the first clock signal, wherein the second clock is spaced from the first clock signal for a preset duration. Therefore, the read parameter of the memory can be correctly and effectively selected out and the problem of system halt caused by unreasonable read parameter selection is solved.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to a method and device for selecting and reading parameters. Background technique [0002] At present, eMMC (Embedded Multi Media Card, embedded multimedia card) is commonly used in mobile phone memory to store codes and files. There are differences in the design of eMMC from different manufacturers. If the CPU uses the same set of read parameters to read and access eMMC from different manufacturers, it will often Probabilistic crashes or inability to boot may occur. [0003] Among them, the traditional method of selecting eMMC reading parameters is as follows: [0004] CMD21 (the 21st command prompt) has been added to the eMMC4.5 specification. The function of this command is tuning (adjustment) to read parameters. The basic principle is: save a specific Pattern (code type) in eMMC, which includes 128 bytes. For details, see figure 1 As shown, among them, 101 is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/10
Inventor 李斌
Owner LEADCORE TECH
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