Brief analysis of >50MB/S eMMC technology of mobile phone micro hard disk reading speed

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Mobile micro-drive Read Speed >50mb/s

Before starting today's topic, please go back with the author, recalling the 2011 annual multi-media phone cross-evaluation. The results of the cross-evaluation is not the focus, the key is not to know that we have not noticed that the rabbit ran in one of the points, it is worth our attention, it is "SD card reading speed." Each review will always have a netizen message query: Why the evaluation of the product, SD card write, read speed of 0? This question the author here again unified answer once: An in this score test item, need to be tested product has more than 300MB built-in storage space, that is tested products in the premise of not inserting an external SD card, the fuselage should be guaranteed to read and write built-in storage space of 300MB or more.

Brief analysis of >50MB/S eMMC technology of mobile phone micro hard disk reading speed

Of the 16 products involved in the review, 3 of the products "SD reading speed" is outstanding, they are Samsung Galaxy Sⅱ (I9100), Meizu MX (dual-core version), as well as Xiaomi mobile phone, this test scores of 3 phones are shown as ">50mb/s", is basically twice times the performance of other products, which is why? This is today's theme: Mobile micro-disk--EMMC technology.

In the 2011, there were only 3 products using EMMC solution in the cross-evaluation of multimedia mobile phones.

Special note: Super Rabbit system Evaluation Antutu Benchmark is a software that runs on the Android phone and tablet hardware to run a full test project with one click, with memory performance, CPU integer performance, CPU floating point performance, 2D, 3D drawing performance, Database i/ O, SD card reading, write speed and many other performance tests, and the overall mobile phone and individual hardware performance ratings. Simultaneously upload scores and view the device's ranking in the world.

Mobile Phone with EMMC solution (left) "SD read speed" exceeds 50mb/s

Where RAM represents the throughput capacity of the machine for data operations, CPU integer/floating-point performance on behalf of the processor, the 2d/3d drawing performance of the graphics processing chip to the image rendering ability, database I/O performance represents the processor and RAM access to the database efficiency, SD card Write/ Reading speed indicates that the ROM can read and write ability (currently the test requires more than 300MB rom free space, so if the body storage space/rom less than 300MB, then ignore the results, but the total score to deduct the relative points). The higher the theoretical score, the stronger the performance of the item.

EMMC: Embedded Storage Solutions

First of all, it is clear that the phone has built-in storage space, and the phone can support the external memory card is two concepts. The mobile memory card mainly includes TF card (Trans Flash, also called microSD card), RS-MMC card (also called Mobile MMC card), and MMC (multimedia card). As for the early Sony Ericsson Memory Stick Memories Stick has exited the historical stage, and CF card, SD card, MINISD card, and mobile phone distance is still a bit far.

Various microSD memory cards commonly used in mobile phones

The problem has come, different brands of mobile phone manufacturers in mobile phone production process, hardware facilities are also very different, such as mobile phone memory card slot size specifications. and memory card manufacturers therefore produce different sizes of mobile phone memory card, to match the different sizes of memory card slots for the use of mobile phones. And name these memory cards. The ultimate goal is to use different names to distinguish between different sizes of memory cards, we can generally think that the different names of the memory card is actually only the size of the same.

Today's mobile phone, has no longer just rely on external memory card expansion capacity, the phone itself has built up to up to 64GB of storage space, so this storage space is different, just mentioned the different speed of the SD card reading speed.

The EMMC scheme of different brand is also the size varies

EMMC (embeded Multimedia card): It is not a new size memory card, but an embedded memory standard specification made by the MMC Association, and is designed specifically for mobile and mobile embedded products. eMMC is simply an embedded storage solution that integrates a controller and provides a unified standard interface in addition to conventional memory.

eMMC design concept is to simplify the use of memory in the phone, the NAND flash chip and control chip design into 1 MCP chip, mobile phone customers only need to purchase EMMC chip, do not need to deal with other cumbersome NAND flash compatibility and management issues. eMMC's greatest advantage is to shorten the time to market and research and development cost of new products, and accelerate the speed of product innovation. See here there must be some people have already understood eMMC what is a thing, if still not quite understand, but want to find out, please continue to see the last page of plain English explanation.

eMMC Plain English explanation is easy to understand

eMMC plainly, in fact, is in the original built-in memory, and added a control chip, and finally in a unified way package, and set aside a standard interface for mobile phone customers to use directly. This is a bit like MediaTek's MTK, or Qualcomm's Snapdragon solution, which is not just a CPU, but a set of solutions. This simplifies the operation and avoids the compatibility problems between different hardware. The above 3 products can be in the SD card read one of the stand out, relying on the eMMC, of course, the use of eMMC built-in storage not only these three, recently to the author left a more deep impression, mobile first Android4.0 dual-core intelligent machine-ZTE U970 also belong to the eMMC camp products.

The mobile phone's built-in storage read speed increases, the immediate benefit is the mobile phone execution efficiency. Whether it's playing a music video, browsing the web, or playing a game that consumes the most hardware resources, the so-called ROM read speed is an important indicator in addition to the processor and RAM.

NAND Flash (left)/emmc (right) comparison

The board members of the MMC Association include: ATP, Asus, Gemplus, Hewlett-Packard, Infineon, Intel, Itri, Kingston, Lexar Media, Micron Technology, Nokia, Power Digital Card, Samsung Electronics, Silicon Motion. After the latest eMMC4.5, eMMC's new specifications will be led by Samsung's UFS (Universal Flash Storage), which will even pack the RAM in the future, and Samsung has a rare rival in this regard.

emmc=nand flash+ Flash control chip + standard interface package

We recommend that you focus on our evaluation articles in the future, you can focus on the rabbit run in the "SD card read" A score, because the results and mobile phone application loading speed is also closely related.