UFS 3.0 fly around | About two or three things on the store

At the end of last month, JEDEC, the world leader in standards development for the microelectronics industry, unveiled the UFS v3.0 standard, boosting single-channel bandwidth to 11.6Gbps, which is twice the performance of HS-G3 (UFS 2.1) Support for dual-channel two-way read and write, so UFS 3.0 interface bandwidth up to 23.2Gbps, which is 2.9GB / s.

A few days ago this news, see the major technology media, but many of my friends looked at the circle: UFS3.0 what is the ghost? 23.2Gbps bandwidth on the phone mean? UFS3.0 are used what ? Used in the cell phone will give us what to upgrade? So the current school of fever, we talk about UFS 3.0 storage technology, for everyone to answer questions.

Speaking from the UFS phone storage

A brand conference, the stage said: We use the UFS2.1 storage!

Next to the big brother scream scared me.I spoke with the big brother -

Me: I say Brother you screaming Gesha, manufacturers will not be hired to pay childcare? Not a store?

A big brother said contemptuously: I heard that the solid-state hard drive SSD is not a UFS mobile phone on the SSD! Transfer faster!

Me: Why is it called UFS is not called SSD? Is not it faster, there is a X use?

A big brother instantly darken his face ...

(PS: Do not learn me, easy to have no friends)

In fact, this brother said yes, now UFS storage really faster than the previous eMMC storage transfer, but why faster? What is the difference between them? Phone storage has undergone what development? Let's sort it together :

eMMC and UFS are what?

Accurately speaking, it should be a technical standard, not the hardware of the chip itself.As memory chips use these technical standards in their packaging, these acronyms are often used to refer to the types of these chips.

eMMC stands for 'embedded Multi Media Card', an embedded multimedia memory card , Developed by the MMC Association. From eMMC4.3 developed all the way to 4.4, 4.5 until now 5.0, 5.1, transmission speed from 50MB / s all the way to the latest eMMC5.1 hurricane 600Mb / s, and commonly found on the phone eMMC5 .1 The actual reading speed will not exceed 300MB / s.

Due to the single-channel nature of the structure, eMMC can not simultaneously read and write data, does not support multi-threading, and wants to improve the performance of such a memory cell. Only by continuously improving eMMC's bus interface, that is, we just said that eMMC version upgrade. The eMMC storage does not have much room for improvement.

UFS stands for 'Universal Flash Storage', which is Universal Flash Storage , By the solid state technology association JEDEC.Compared with the eMMC, the advantage is that the use of high-speed serial interface instead of the parallel interface, switch to full-duplex mode, send and receive data can be carried out simultaneously.

Before the manufacturers are strongly publicized UFS 2.0 specification is divided into two kinds, the mandatory standard HS-G2, optional HS-G3 HS-G2 1Lane maximum read and write speeds of 2.9Gbps ​​(about 360MB / s), 2Lane highest Read and write speeds of 5.8Gbps (about 725MB / s). Optional standard HS-G3 1Lane maximum read and write speed of 5.8Gbps (about 725MB / s), 2Lane maximum read and write speed of 11.6Gbps (about 1.45GB / s).

UFS 2.1 flash memory standard speed standard without any change, mainly in equipment health, performance optimization, security protection has been upgraded in three areas.

At the beginning of the text we say that UFS3.0 is upgraded again based on this one, the bandwidth is 2 times of UFS 2.1, the maximum bandwidth of the theoretical interface is 23.2Gbps, the transmission speed is 2.9GB / s. Compared with the latest eMMC5.1 Standard, in theory, has nearly 5 times the performance advantage.

Which protocol is used by Apple store?

We often hear the saying that Apple's storage is particularly fast, so the phone is smooth.So iPhone is UFS? In fact, not from iPhone 6s, Apple's phone is using the NVMe (Non-Volatile Memory express) interface protocol , This agreement is more common in the computer's SSD.

At that time, the actual performance of the iPhone 6s flash memory reached a continuous read speed of 402MB / s, continuous write speed of 164MB / s level to the development of the iPhone 8 generation, the performance has been further improved. iPhone 8 Plus measured reading speed of 1131MB / s At the moment In addition to a handful of international flagship UFS2.1 read speed can reach 1100MB / s above, The mainstream Android machine UFS 2.1 actual read speed generally 700MB / s early , So most of the read performance is not as good as the iPhone for granted.

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Different types of storage price difference?

Since the UFS storage performance so cattle X, it is not much more expensive than eMMC? Really not, the reason to start with the storage chip package.

When we talk about storage, we are talking about how much capacity, in fact, mobile phone storage, solid state drives, U disk and SD card are all used is a storage medium called NAND, NAND flash is a non-volatile Sexual storage technology, that is, after the power can still save the data we just said storage, are based on NAND memory chips, coupled with the control chip, access standard interface, made of standard package.

The advantage of such a package is that the structure can be highly integrated, and when the mobile phone client selects the packaged memory chip for hardware stacking of the mobile phone, it does not need to deal with other complicated NAND Flash compatibility and management issues.

Before Apple's storage memory mixed up a hubbub, the reason is that there are different NAND flash memory particles.According to the unit storage density differences, flash memory is divided into SLC, MLC, TLC three types:

SLC (single-level storage) , Single-layer electronic structure, when the data is written, the voltage variation range is small, and the service life is long. The number of reading and writing is over 100,000 but the cost is high.

MLC (Multi-Level Storage) , The use of high and low voltage double-layer electronic structure, long life, acceptable cost, read and write frequency in 5000 or so.

TLC (three-tier storage) , Is the MLC flash extension, the highest storage density, capacity is MLC 1.5 times the lowest cost of the cost, but the mission life is low, read and write times in the 1000 ~ 2000 or so.

Therefore, the use of eMMC and UFS standards although the price has a certain impact, but not for all reasons, but also depends on the type of flash memory particles.It is reported that using UFS3.0 standard memory chip prices will be higher.Of course, Apple's NVMe interface The agreement of the memory chip prices are not low.

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What impact the transmission speed will have on us

That can be so much, I believe we are most concerned about the issue or memory chip transmission speed will give us what impact .In fact, this question is not difficult to answer.I believe that the computer installed SSD friends will have such an experience: the previous mechanical hard drive Boot less less have more than thirty seconds, with the SSD, the boot time less than 10 seconds; loading large games can obviously feel a lot faster in high-speed memory chips on the phone the truth is the same, is to let the phone load Faster.

For example, we all have cognitive: the same time, the iPhone game loading speed back significantly better than Android phones, in addition to the reasons for processor performance and software system optimization, a large part of the reason comes from the Apple NVMe interface protocol memory chip Of course, thanks to this there is application loading speed.

Friends who like to take pictures with their mobile phones certainly had such troubles in the past: when the camera was taking photos, they reacted slowly and waited for a long period of time after pressing the shutter button to shoot successfully. Too many photos were stored in the cell phone, and the photos were loaded slowly and slightly Sliding mobile phone will be stuck to burst. The reason for this is the memory write and read speed is too slow, in addition to cell phone processor and software optimization.

So, regardless of the processor and the software, the storage has a higher write speed, take photos to respond faster, and also allows for higher pixel, frame rate video recording; storage read speed more High, multiple photos and ultra-high-quality video load faster, operation and playback of the Caton even less.

In addition, compared to the eMMC, UFS advantage lies in the use of full-duplex mode, send and receive data can be carried out simultaneously.For example, eMMC is equivalent to a channel that allows only one car through the opposite car to wait Access to the channel after the car came out.While the UFS is a two-way lane, allowing traffic to run at the same time.Use UFS storage of mobile phones in the implementation of multi-tasking, without having to wait for the end of the previous process, a lot of natural efficiency.

So UFS3.0 will bring us what?

Just mentioned a faster loading speed, allowing the picture quality is higher, the number of frames more video capture and playback.In addition to these, but also to Android phones what?

First of all, UFS 3.0 interface bandwidth up to 23.2Gbps, which is the theoretical transfer speed up to 2.9GB / s. Of course, the actual speed will be compromised, but it should not be less than 2GB / s, which is much higher than The actual reading speed of iPhone 8 Plus is 1131MB / s, so if the storage solution of Apple is not greatly upgraded, the next generation of products will be surpassed by UFS3.0 storage mobile phones, and the iPhone will not have an advantage in game loading speed.

In addition, we will also enter the era of 5G 5G network maximum theoretical rate of up to 20Gbps, which is 2.5GB / s or so, according to the theoretical data can instantly download a high-definition movie, but the problem lies in the market are all mobile memory chips Not so high write speed.So, later restrict the download speed will no longer be the network speed, but storage.UFS3.0 large bandwidth and 5G is obviously a high speed with more.

However, in the recent year, UFS3.0 should not be put into the mobile phone market.Because Unicorn 970, Snapdragon 845, Exynos9810 and other research and development earlier, there is no information to prove that the three flagship processors support UFS3.0 standards, so probably only wait until 2019 Years to see on the phone.

Write in the end

See here, I believe we have a certain understanding of mobile storage.Finally, let's talk about how to identify the type of storage chip: Download a named AndroBench, for speed testing.

eMMC actual test reference value

eMMC speed can refer to the table, in general, the sequential read speed of not more than 300MB / s chips are eMMC standard chips now see the mainstream models UFS standard chip sequential read speed 700MB / s or so, of course, if you Encountered sequential read speed to 1100MB / s, it can be said that the phone manufacturers are very conscience.

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