Detection method and device of eMMC (Embedded multi media card) embedded memory
A technology of embedded memory and detection method, applied in static memory, instruments, etc., can solve problems such as inability to detect eMMC
Active Publication Date: 2014-12-17
广东海信通信有限公司
View PDF5 Cites 12 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When multi-layer wiring is used, the I / O port of the eMMC integrated on the motherboard is often not exposed on the surface of the motherboard but hidden under the chip body of the eMMC. It can be seen that when the eMMC needs to be detected, it is impossible to use a multimeter pen or an oscilloscope probe. Touch the I / O port of eMMC, therefore, adopt the hardware detection method in the prior art to be unable to detect eMMC
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] The embodiments of the present invention are applicable to various integrated circuit chips, especially eMMC chips packaged with BGA technology. figure 1 A schematic structural diagram of a typical smart device CPU minimum system in the prior art is shown, such as figure 1 As shown, the minimum CPU (Central Processing Unit, central processing unit) system consists of three parts: CPU, eMMC and DDR (Double Data Rate, double-rate s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The embodiment of the invention discloses a detection method and device of an eMMC (Embedded multi media card) embedded memory, and relates to the field of electronic circuits. The detection method and device are used for detecting on / off of I / O (input / output) ports of the eMMC. The method comprises the following steps: inputting a clock signal with frequency same as a set time frequency through a CLK port; sending a first instruction to the eMMC through a CMD port in order to indicate the eMMC to feed back through the CMD port, and determining the on / off of the CMD port and the CLK port according to received feedback information; erasing at least one minimum data block in the eMMC after determining that the CMD port and the CLK port are the ports in normal use, sending a second instruction to the CMD port so as to write a preset value in a storage space corresponding to the erased data block; reading the value stored in the storage space through a data port, comparing the wrote-in value and the read value to determine the on / off of each data port; thereby realizing above functions.
Description
technical field [0001] The invention relates to the field of electronic circuits, in particular to a detection method and device for an eMMC embedded memory. Background technique [0002] eMMC (Embedded Multi Media Card, embedded memory) is an embedded memory mainly for mobile phones or tablet computers. eMMC is composed of MMC (Multimedia Card, multimedia card) interface, flash memory device and main controller, and adopts BGA (Ball Grid Array Package, ball grid array packaging) technology packaging. The I / O (input / output, input and output port) ports of eMMC packaged with BGA technology are distributed under the package in the form of circular or columnar solder joints in an array, which can increase the integration of eMMC. [0003] In the prior art, when electronic components are tested for hardware, a multimeter pen is usually used to directly contact the I / O ports (pins) of the electronic components to detect the on-off of the I / O ports; an oscilloscope can also be us...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G11C29/56
Inventor 初德进
Owner 广东海信通信有限公司