What is the RAM and ROM in the smartphone?

Since the development of smart phones, people have always been very confused about the storage of mobile phones. What is the operation of memory, memory, storage space, RAM, ROM, etc., different ways to make consumers wander around the clouds The concept is confusing. In these names, the highest recognition rate should be the name of RAM and ROM. Today we will talk about RAM and ROM in mobile phones.

Conceptually, RAM is called Random Access Memory, which translates to random access memory. Although RAM and SRAM are subdivided on the basis of RAM, RAM is more widely recognized by consumers as memory, such as current In the phone configuration, the storage combination generally has 2GB+16GB, 3GB+32GB, 4GB+64GB, etc. These 2GB, 3GB, and 4GB are RAM, which is what we often say.

In the Android phone, many consumers may be very confused. Why do you say that when you buy it, it is 4GB of memory. When you boot it, the memory size is only 3.xGB, and the actual available memory is only 2.xGB. Is this not the case? Was it cheated? Of course not, the mobile phone as a smart hardware, its graphics processing (GPU) work also requires memory support, so the 4GB of memory promoted by the manufacturer is not falsified, and the part of the memory used by the graphics processor is not displayed. It is normal to display the 3.xGB in a mobile phone configured with 4GB of memory when the point is the same as when the computer uses only the kernel.

Since the memory displayed by the mobile phone is not consistent with the manufacturer's propaganda, it is easier to understand that only 2.xGB is actually available. Like the computer, when the mobile phone system is running, it also takes up a part of the memory, so after booting, the available memory of the mobile phone is definitely smaller than the memory capacity displayed in the setting.

Left one plus 4GB memory, right Sony 2GB memory

Talking about the phone and talking about ROM, everyone thought I had to teach the brush machine! Of course, we can talk about this later. Now let's take a look at what is ROM. ROM is the abbreviation of Read Only Memory, generally called read-only memory. In the mobile phone market, it is more considered to be the storage capacity of mobile phones. In the past, mobile phone ROMs were generally 4GB, 8GB, 16GB, etc., and most of the current mobile phone ROMs have started from 32GB.

At present, many mobile phone parameters are generally marked with the word "eMMC" in the ROM of the mobile phone specification specification (some high-end machines are UFS), and eMMC is an embedded multimedia card (embedded MulTI-Media Card), which is a new storage technology, and its external The interface provided is similar to the SD card. The internal storage medium is Flash (flash memory), which can be directly soldered to the mobile phone circuit board. Therefore, some people call ROM as flash memory.

Flash chip in mobile phone

The mobile phone ROM usually consists of two parts, one part is occupied by the system, and the user's operability is small; the other part is the storage space that the user can freely control, which is equivalent to the computer hard disk. This has the capacity division of the mobile phone ROM. The nominal capacity is displayed on the configuration parameters, and the user can operate the available capacity. The difference between the two is the part occupied by the system. The nominal 16GB capacity of the iPhone is about 12GB, and with the continuous installation of the software, the disposable capacity is getting smaller and smaller. This is the place where users have been complaining, and the main reason why the iPhone uses 32GB ROM.

The division of ROM in Android mobile phone is similar to that mentioned above, and in the space occupied by the system, there are two main partitions of "system" and "data". The system partition is mainly placed with system files, and the mobile phone is playing. All the system files are basically placed in this area. The "data" area stores the third-party software data installed by the user, that is, the uninstallable software installed by the user is placed in this partition. The early "data" area is very rigid, and its space size is unschedulable. This is why many users have been posting help in the forum. It is obvious that there is still 1 GB of space on the mobile phone but it is impossible to install software and the like. Now the "data" partition is relatively flexible, and you can call the space of other partitions to store the software data installed by the user.

Meizu mobile phone ROM division

The brush machine mentioned above, no matter which system of the machine can be brushed, the so-called brush ROM generally refers to the Android phone brush machine, the part written by the system is mainly occupied by the system, including "system" and "data" and other partitions, similar Computer reinstallation system. Depending on the size of the ROM package, the storage space that the user can freely control will also be affected accordingly.

ROM does not shut down like RAM to clear all data, but ROM uses Flash chip as storage medium, has a certain erasing life, but when the Flash chip is really dead, the mobile phone has long been an antique.

Today's mobile phones are basically started with 32GB ROM. Under normal circumstances, there will be no shortage of space, and many mobile phones can expand the capacity of mobile phones through flash memory cards. This is the gospel of the offline video party, but some still use 16GB ROM. Or the following users may have relatively tight space, and there is probably not much margin except for everyday applications. If you still have a small-capacity mobile phone in the past, and you are a user who loves to watch software and watch videos, you should consider replacing a new mobile phone. Now the software is taking up more and more, it is easy to put the ROM. Filled up; if your mobile phone is only used as a general communication tool and social device, if you have enough performance, you don’t have to worry about the space. In the hand, I have a 16GG iPhone SE as the main force, and install 50 daily software. Proper; if you are using a mobile phone or a small-capacity mobile phone is only a spare tire, there is no need to change the machine, users can measure their own habits. Of course, if you feel that the storage space of the mobile phone is a bit tight, but you can't use it to change the machine, you should diligently clean up the cache files generated by the weekdays in the system to save more free space.

The author's main machine SE, you can see that there are quite a few software installed, there are still several G available

Having said that, I don’t know if you have a clear understanding of the RAM and ROM of your mobile phone. If you have any questions, you can chat with Xiaobian in the comments below.