What are the commonly used single chip microcomputer models? What are the characteristics and differ

We generally use the Atmel 89 series. The two major companies of MCU are Atmel and Philip. Philip has a wide range of options, and Atmel has a wide range of easy to use.

89C51 is the most widely used, the most mature technology, and we are learning.

There is also a kind of Microchip PIC series, which is characterized by the RISC instruction set using the Harford structure, the program memory and program memory bus are separated from the data memory and data memory bus, which reduces the burden on the bus, improves the processing speed, and more conveniently adopts the instruction pipeline structure.

The program memory, the program memory bus and the data memory, the data memory bus are not equal in width, the instruction byte is long, all the instructions are a single byte, the program memory is highly efficient, the reliability is high, and the multi-byte instruction system will not take the instruction to the middle of the multi-byte instruction.

In addition, most of them are single-cycle instructions, and the data memory can be used as a register.

According to the bus, there are: 8-bit machine, 16-bit machine, 32-bit machine, 64-bit machine.

The development of single-chip microcomputer has gone through 4-bit, 8-bit, 16-bit and 32-bit stages. 8-bit single-chip microcomputer is widely used in industrial control, intelligent interface, instrumentation and other fields due to its strong function, 8-bit single-chip microcomputer still occupies the mainstream position in medium and small-scale applications, representing the development direction of single-chip microcomputer, and plays an increasingly important role in the field of single-chip microcomputer application.

In the early 80s, Intel introduced the 8-bit MCS-51 series of microcontrollers. The logic components of the MCS-51 microcontroller include an 8-bit CPU with on-chip oscillator, 80514B mask ROM, 87514kbePROM, and 8031 ROM-less.

Special function register SFR128BRAM, timer counter T0 and T1, parallel IO interface: P0, P1, P2, P3; Serial interface: txd, rxd; Interrupt system: int0, int1.

What is a single-chip microcomputer? What are the main features of single-chip microcomputer?

What is a single-chip microcomputer? What are the main features of single-chip microcomputer? Hello dear!

Single-chip microcomputer, also known as microcomputer, is the integration of CPU, RAM, ROM, BUS and input and output ports on an integrated circuit, which is called single-chip microcomputer. The single-chip microcomputer has a certain arithmetic operation and logic operation ability, through the IO port can realize the input and output functions, some single-chip microcomputers also integrate EEPROM, comparator, AD conversion and reference voltage output modules, I hope to help you, I hope to help you! If my answer is helpful to you, please give a thumbs up (in the lower left corner), I look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress.

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The single-chip microcomputer has the following characteristics:1. Excellent performance ratio.

At present, in the domestic market, some single-chip microcomputer chips are only a few yuan, plus a small number of peripheral components, can constitute a very functional intelligent control device.

2. High integration, small size and good reliability.

The single-chip microcomputer integrates each functional component on a chip, and adopts a bus structure inside, which reduces the connection between the chips and greatly improves the reliability and anti-interference ability of the single-chip microcomputer. Moreover, due to the small size of the single-chip microcomputer, the socks are easy to take electromagnetic shielding or sealing measures, and are suitable for working in harsh orange environments.

3. Strong control ability.

The single-chip microcomputer has abundant instructions and can fully meet them. Various requirements for industrial control.

4. Low power consumption, low voltage, easy to produce portable products.

5. Easy to expand.

It can be extended in parallel or serial as needed to form a computer control system of different application scales.

Application features: The single-chip microcomputer has the following application characteristics:

1) Have a good degree of integration;

2) The single-chip microcomputer itself is small in size;

3) The single-chip microcomputer has a powerful control function, and the operating voltage is relatively low;

4) The single-chip microcomputer has the advantages of easy carrying, and at the same time, it is cost-effective. SCM is mainly used in the following fields, namely: automated office, mechatronics, cutting-edge and national defense and military fields, aerospace fields, automotive electronic equipment, medical equipment fields, commercial marketing equipment, computer communications, home appliances, daily life and real-time control fields.