Concepts related to ram, Rom, and fflash

I. Rom

ROM: read only memory, read-only memory

It is a kind of semiconductor memory, also called non-volatile memory. The feature is that once data is stored, it cannot be changed or deleted. The stored data will not disappear because the power supply is off.

Ii. Ram

Ram: Random Access Memory, random access (ACCESS) memory
AlsoIs a semiconductor memory,It is also known as random access memory and volatile memory. The content of a storage unit is readable and writable, And the access speed is independent of the location of the storage unit. This kind of memory will be lost when the power is down, so it is mainly used to store programs that are used for a short time.

To put it simply, Ram and Rom in a computer are all data storages. Ram is a random access memory, which is characterized by volatile power loss and memory loss. Rom usually refers to the fixed memory (one write, repeated read), which features the opposite of RAM.

A Brief Comparison Between ROM and RAM: Rom won't lose data when the system goes down, while Ram will lose data after power loss. A typical Ram is the memory of the computer.

Iii. Ram is divided into two categories:
1) static RAM (static RAM/SRAM) is a fast-reading and writing storage device, but it is also very expensive, therefore, it can only be used in demanding scenarios, such as CPU Level 1 buffering and level 2 buffering.

2) The other is dynamic RAM (Dynamic RAM/Dram). DRAM retains data for a short period of time and is slower than SRAM, but it is faster than any Rom, but in terms of price, DRAM is much cheaper than SRAM, and computer memory is dram. ,

Iv. Flash

Flash Memory, also known as flash memory, combines the strengths of ROM and ram. It not only has the ability to erase, programmable, but also does not lose data when power is cut off. It can also quickly read data. Such memory is used in USB flash drives and MP3 flash drives.

Concepts related to ram, Rom, and fflash