Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about what people usually call computer memory. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Computer memory is usually referred to as RAM (random access memory). RAM can be read and written at any time (except when refreshed) and is very fast and usually acts as a temporary data storage medium for the operating system or other running programs.

Computer memory is usually referred to as RAM (random access memory).

Random access memory (Random Access Memory, abbreviation: RAM), also known as main memory, is an internal memory that exchanges data directly with CPU.

It can be read and written at any time (except when refreshed), is fast, and is usually used as a temporary data storage medium for the operating system or other running programs.

RAM can write (store) or read (read) information from any specified address at any time while working.

The biggest difference between it and ROM is the volatility of data, that is, the data stored in the event of a power outage will be lost.

RAM is used in computers and digital systems to temporarily store programs, data, and intermediate results.

Characteristics

Random access

The so-called "random access" means that when the data in the memory is read or written, the time required is independent of the location of the information or the location of the static random access memory written.

In contrast, when reading or writing sequential access (Sequential Access) to information in a storage device, the time required is related to the location. It is mainly used to store operating system, various applications, data and so on.

When RAM is working properly, you can read data from RAM or write data to RAM. Compared with ROM, RAM has the advantages of convenient reading / writing and flexible use, so it is especially suitable for frequent and rapid data change.

Volatility

RAM cannot retain data when the power is off. If you need to save data, you must write it to a long-term storage device (such as a hard disk).

The working characteristic of RAM is that after being powered on, the data information can be accessed at any location at any time, and the internal information also disappears after the power is cut off.

Sensitive to static electricity

Like other fine integrated circuits, random access memory is very sensitive to the electrostatic charge of the environment. Static electricity will interfere with the charge of the capacitor in the memory, cause data loss, and even burn out the circuit. Therefore, you should touch the metal ground with your hands before touching the random access memory.

Access speed

Modern random access memory has the fastest write and read speed of almost all access devices, and the access latency is negligible compared with other storage devices involved in mechanical operation.

Need to refresh (regenerate)

Modern random access memories rely on capacitors to store data. When the capacitor is fully charged, it represents 1 (binary), and the uncharged represents 0.

As there is more or less leakage of capacitors, if not treated specially, the data will gradually be lost over time.

Refresh refers to regularly reading the status of the capacitor, and then recharging the capacitor according to the original state to make up for the lost charge. The need for refresh explains the volatility of random access memory.

The above is what people share with you about computer memory. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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