How to choose Android tv box storage
What does eMMC mean? Which is better for eMMC and UFS flash? Let's take a look at the following.
Which is better for eMMC and UFS flash?
Both eMMC and UFS are standards for storage. You can understand them as mechanical hard disks and SSD hard disks. The most obvious difference is the difference in read and write speeds. The read speed of eMMC5.1 is about 600MB/S, while the speed of UFS2.0 is 1400MB/S, which is more than twice the fastest speed of eMMC5.1, and the speed of UFS2.1 is of course faster.
eMMC (EmbeddedMulti Media Card) is an embedded memory standard specification for the MMC Association that is primarily for products such as mobile phones or tablets. eMMC is currently the most popular portable mobile product solution with the goal of simplifying the design of end product memory. Since different brands of NAND Flash chips include Samsung, Toshiba or Hynix, Magnesium, etc., when designers are introduced, they need to be redesigned according to the product and technical characteristics of each company. In the past, no technology was available. The NAND Flash chip of the label.
The design concept of eMMC is to simplify the use of internal memory. The NAND Flash chip and the control chip are designed as one MCP chip. The mobile phone customer only needs to purchase the eMMC chip and put it into the new mobile phone without dealing with other complicated NAND Flash compatible. The biggest advantage of sex and management issues is to shorten the time-to-market and R&D costs of new products and accelerate the speed of product innovation.
Now, eMMC 4.5 has been released. The read speed of eMMC 4.4 is about 104MB/s, and that of eMMC 4.5 is 200MB/s. The performance was excellent at the time. On July 29, 2013, Samsung started the mass production industry. The eMMC 5.0 storage product has a read speed of 400MB/s, but because it uses an 8-bit parallel interface, the performance potential has basically reached the bottleneck. With the latest eMMC 5.1 specification, the theoretical bandwidth is about 600MB/s. A big increase in performance is basically impossible.
In 2011, the Joint Electron Device En gineering Council (JEDEC) released the first generation of Universal Flash Storage (UFS) standard, hoping to replace eMMC. However, the first generation of UFS was not popular because it did not seem to provide sufficient advantages over the constantly updated eMMC. To this end, JEDEC released a new generation of universal flash storage standard UFS 2.0 in September 2013, which can read and write flash memory up to 1 400MB per second, which is equivalent to reading and writing two CDs in two seconds. The data, not only has a huge advantage over eMMC, it can even dwarf the flash storage medium solid state drive used on the computer.
UFS 2.0 flash uses a serial interface, much like PATA, SATA conversion. And it supports full-duplex operation, simultaneous read and write operations, and also supports instruction queues. In contrast, eMMC is half-duplex, reading and writing must be performed separately, instructions are also packaged, and it is already slightly inferior in speed. Moreover, the UFS chip not only has a fast transmission speed, but also consumes half the power consumption than eMMC 5.0. It can be said that it is an ideal match for the flagship mobile phone flash memory in the future.
In addition to the huge advantages in speed performance, UFS 2.0 also performs better in terms of power consumption. In fact, even a new generation of UFS 2.0 standards can be equal to eMMC if it is compared in terms of power consumption. However, eMMC and UFS 2.0 consume approximately 1mW (milliwatts) of power during operation, while power consumption in standby mode will be less than 0.5mW. When UFS 2.0 is fully loaded, it consumes more power than eMMC, but it can complete operations faster and switch to standby earlier, so UFS 2.0 is comparable to eMMC in terms of power consumption.
Although eMMC is not as fast as the current UFS 2.0 in terms of transmission speed and performance, it will continue to dominate the mainstream of mobile product flash chips for a long time in the future. Because eMMC has a more mature process, it can be mass-produced, and the cost is lower, which is more suitable for the popular flash memory chip of mobile products. Although UFS2.0 is very good, the production cost is high, and it is only at the beginning of the market. Can be used on high-end products. However, with the current trend, UFS will gradually become the mainstream of the mobile product market. After all, technology needs to be improved.