What are the characteristics and differences between memory and external memory in a microcomputer?

Hello: The internal memory has high speed and small capacity, and is generally used for temporary storage of programs, data and intermediate results; The capacity of the external memory is large and slow, and it can store programs and data for a long time.

Summary. Memory: Volatile.

Memory includes both cache and main memory in RAM. It formally includes memory and auxiliary memory. High-performance data very close to CPU; SRAM is more expensive than DRAM; DRAM is more expensive than external memory.

upgradable; Expensive compared to external storage media. Storing CPU Instructions: Caching with frequently repeated instructions for efficiency, primarily for communicating CPU instructions with other computer devices and components.

What is the storage system of a microcomputer? What are the characteristics of memory and external memory?

Memory: Volatile. Memory includes both cache and main memory in RAM.

It formally includes memory and auxiliary memory. High-performance data very close to CPU; SRAM is more expensive than DRAM; DRAM is more expensive than external memory. upgradable; Expensive compared to external storage media.

Storing CPU Instructions: Caching with frequently repeated instructions for efficiency, primarily for communicating CPU instructions with other computer devices and components.

External memory: Non-volatile, although external memory is also a type of storage, it is different from cache and main memory because it is non-volatile. Slower, but able to get higher capacity at a lower cost upgradeable; The cost of HDDs is within a broadly acceptable range, while the cost of SSDs is decreasing year by year, which is very close to HDDs.

Data can be stored until the scheduled data is moved or deleted. Hard drives and tapes without power will hold data indefinitely. A powerless SSD can retain data for up to two years, but in reality this period is much shorter.

1.Multi-level storage systemThe multi-level storage structure constitutes a storage system as a whole. From the CPU's point of view, the overall speed is close to the operation speed of cache and registers, and the capacity is the capacity of auxiliary memory (or massive memory), and each bit is close to the bits of auxiliary memory.

So as to better solve the contradiction between speed, capacity and quality in memory, and meet the application needs of computer systems.

Memory is divided into internal memory (memory) and external memory (external memory).

Memory memory is a place where data is temporarily stored inside the computer for the CPU to read directly, and the data stored in it is maintained by electricity, and it will be lost once the power is off. Therefore, when operating the computer, the information that needs to be saved should be saved in a timely manner.

The characteristics of memory are: small capacity, extremely fast speed, temporary storage of data.

External memory includes floppy disks, hard disks, and optical discs, and the data stored in them is maintained by magnetism, so that the data can be stored permanently.

Features of external memory: large capacity, slower speed, and permanent data storage.

Memory and external memory are the two storage mediums of a computer that are used to store data and programs. Memory is the main memory of a computer, also known as RAM (Random Access Memory). It is located on the motherboard of the computer and can be accessed by the CPU's CPU (Central Processing Unit) of the computer.

External memory is the additional memory of the limb computer, also known as auxiliary memory. It includes hard drives, flash drives, and network storage devices, among others. External memory is often used to store large amounts of data and programs, rather than to run programs.

Compared with external memory, memory has the following characteristics:

Capacity: Memory capacity is typically smaller than external memory capacity, which may be only tens or hundreds of megabytes, while external memory capacity may be tens of gigabytes or hundreds of gigabytes.

Speed: The speed of the memory is faster than the speed of the external memory. The speed of memory can be in the hundreds of gabits per second, while the speed of external memory can be only a few hundred terabits per second. This is because the memory is directly connected to the CPU, while the external memory must be accessed through a device such as a hard drive controller.

**: Memory is generally more expensive than external memory.

Persistence: Data in memory is lost when the power supply is disconnected, while data in external memory can be stored for a long time.

The biggest difference is the speed, and the memory speed is the external memory.

hundreds or thousands of times. Then there is the use, the memory is mainly used to run programs, and the external memory is used to store data. The memory read and write speed is faster than that of external memory, but the memory capacity is relatively small, and now it is only 1-2G, and the outer size can reach hundreds of G, and the memory computing speed is also faster than that of external memory.

When looking for a cell, you must first give its address code. A register that staging this address code.

It's called the memory address register. It can be stored from the master memory.

The information taken out in the memory cell or the information to be stored in a memory cell is also set up with a memory data register.