Shulou(Shulou.com)06/01 Report--

What I want to share with you in this article is about the relationship between the frequent collapse of iPhone 6 Plus and TLC. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article.

According to foreign reports, there are serious problems caused by storage media in iPhone 6 Plus, and the mobile phone system will crash and restart constantly. If true, Apple is likely to recall all iPhone 6 Plus phones.

AppleInsider reported that as long as iPhone 6 Plus users install more than 700 applications, the mobile phone system will have problems and keep rebooting. The above situation has occurred to many users, among which the situation of 128GB is the most serious.

Apple is likely to choose the less stable NAND flash memory in order to reduce the cost of large-size, high-capacity models, and the control IC is likely to be the culprit.

The report points out that the flash storage medium used by Apple is third-order storage unit (TLC), which represents a memory storage unit that can store 3 bits, which is 2 to 3 times more than single-order storage unit (SLC) and multi-order storage unit (MLC), but the transmission speed is not as fast as SLC or MLC, so the price is relatively cheap, and the most fatal thing is that the life is short, and the number of erases and writes about 1000 times is much lower than that of SLC and MLC.

For TLC NAND flash memory, it is very important to minimize the number of reads and writes. Due to the limited number of erases and writes, frequent and large numbers of data writes are unbearable for TLC flash memory. For most MLC solid state drives, the durability of NAND flash memory is not a problem, but for TLC solid state drives, durability is its fatal weakness, which puts forward higher requirements for the main control.

TLC architecture officially appeared in 2009, Samsung took the lead in releasing the first TLC solid-state drive in the third quarter of 2012, and only one of the three stars has a TLC hard drive in the past two years, until recently SanDisk launched the TLC solid-state disk, as of the current global scope, there are only two, it can be seen that the industry is still more cautious about the application of TLC technology, and there are more considerations on the technology or the market.

Why is the application of TLC becoming more and more popular? First of all, the growth of SSD capacity makes reliability no longer a problem. In addition, the master / DSP technology, which is responsible for reading and writing SSD flash memory, is also improving every year. For example, the service life of a 128GB 64GB SSD is doubled from capacity to 128GB, and if the capacity is increased to 256GB, the service life will be doubled again. After some optimization work, the adoption of TLC in Apple's 128GB can be said to solve the problem of longevity.

Generally speaking, the application of TLC is also limited to some cheap flash drives. Different from the simple storage media, the storage space on the mobile phone needs to exchange all kinds of data with the processor, which is similar to the relationship between the hard disk on the PC. We can think that the mobile phone-side TLC SSD storage media will also benefit after the maturity of the PC-side TLC technology.

Apple iPhone 6 Plus 128GB storage media uses Hynix products. When it comes to Hynix, many people's first reaction can think of memory chips. Most people are unfamiliar with Hynix's TLC storage products, but in fact, companies in the industry, such as Samsung, Micron, and Hynix, which have their own controllers, have the above problems. Many people think of the problems of the storage controller, and we can only privately guess that there is something wrong with Hynix's own main control technology.

Big data online believes that with the steady improvement of master control technology, TLC has begun to form a market segment in the field of flash memory, which will get more applications in the future, and will continue to pull down the price of flash memory, but due to the inherent limitation of its erasure times, the core of TLC future competition lies in the master control technology, and the problem of TLC crash like iPhone 6 Plus is still inevitable in the future.

This is what the frequent collapse of iPhone 6 Plus has to do with TLC. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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