What is the main difference between semiconductor read-only memory and semiconductor random access memory?

The main difference is that semiconductor read-only memory ROM can store information permanently, while semiconductor random access memory RAM will lose information after power is turned off. The characteristic of ROM is that it can only read information but cannot write information; and the content will not be lost after the power is turned off, and it will automatically restore after powering on. The characteristic of RAM is its fast reading and writing speed. Its biggest disadvantage is that the contents inside it disappear immediately after the power is turned off.

#The operating environment of this article: windows10 system, thinkpad t480 computer.

The main difference between semiconductor read-only memory (ROM) and semiconductor random access memory (RAM) is that ROM can store information permanently, while RAM will lose information when the power is turned off.

Read-only memory (ROM) and random access memory (RAM) both belong to internal memory (memory). The characteristics of read-only memory (ROM) include the following two points.

①The original content (in the memory) can only be read out, but cannot be modified, that is, it can only be read, not written.

②The content will not be lost after a power outage and will be automatically restored after power on, that is, it is non-volatile.

Random access memory (RAM) is characterized by fast reading and writing speeds. The biggest disadvantage is that the contents disappear immediately after power is turned off, that is, it is volatile.

Extended information:

Read-Only Memory (ROM) works in a non-destructive readout mode and can only read information but cannot write it. Once the information is written, it is fixed and will not be lost even if the power is turned off, so it is also called fixed memory. The data stored in ROM is usually written before being loaded into the whole machine. It can only be read out during the operation of the whole machine. Unlike random access memory, the stored content can be rewritten quickly and conveniently. The data stored in ROM is stable and will not change after a power outage. It has a simple structure and is easy to use, so it is often used to store various fixed programs and data.

Random Access Memory (English: Random Access Memory, abbreviation: RAM), also called main memory, is an internal memory that directly exchanges data with the CPU. It can be read and written at any time (except when refreshing), is very fast, and is often used as a temporary data storage medium for the operating system or other running programs. When RAM is working, information can be written (stored) or read (retrieved) from any specified address at any time. The biggest difference between it and ROM is the volatility of data, that is, the stored data will be lost once the power is turned off. RAM is used in computers and digital systems to temporarily store programs, data, and intermediate results.

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