Is MCU hard? Is there a future for learning MCU?

Learning single-chip microcomputer is very promising and promising.

For control with low computing requirements, single-chip microcomputer applications abound. It's almost everywhere in the city, but you haven't noticed it yet. From traffic control systems to handheld devices.

As a kind of microcontroller, single-chip microcomputer is the control hub and the core thing of electronic products, basically all electronic products are inseparable from single-chip microcomputer, so the single-chip microcomputer is very demanding, and the demand for single-chip microcomputer must be very strong.

In the early years, it was mainly based on foreign brands, with the development of China's independent chip brands, domestic chips gradually rose, and there are more and more information on the current network of single-chip microcomputers, and the relative entry threshold is also decreasing, but it is easy to make electronic products, and it is difficult to do a good job.

A machine is normal, does not mean that the production of 10,000 machines are normal and excited, there may be a variety of failures and problems, because the design is unreasonable, resulting in a high rate of defective products, the electronic products to be excellent, stable, it requires a very mature writing framework and ideas.

On the whole, single-chip microcomputer engineers are very promising, can get relatively higher wages and better development, with single-chip microcomputer as a technical entry, continuous learning, you can try to learn the latest and most cutting-edge technology, such as AI intelligence, speech recognition, etc., if you do not learn, any industry and profession, will be gradually eliminated.

There are many factors in the difficulty of the single cherry file exam, including the time missed in the exam and the knowledge tested. It depends on the content of the exam, and it should be more difficult for the more complex questions or the wider range of exams. However, if it is a small range of knowledge points, the difficulty of the exam is usually low, and it should be easier.

The processor CPU, RAM, read-only memory ROM, IO port and interrupt system, timer timer, etc. are integrated in a chip, and the device that executes more complex programs is called a single-chip microcomputer.

Operational amplifier is a kind of analog device with extremely high amplification and high accuracy, the most basic function is to amplify the analog voltage signal, different operational amplifiers can have a variety of non-bright matching characteristics for various needs, some have extremely wide bandwidth, some have extremely high input impedance, and some have extremely high precision. Chain key to take.

The single-chip microcomputer is mainly a digital device, the main function is to process digital signals, some single-chip microcomputers also have analog input and output channels (a d converter, d a converter), but usually can not directly process weak analog voltage signals. Shed building.

Upstairs said that the single-chip microcomputer has high precision and low op amp accuracy, and the high-precision op amp can effectively amplify the voltage signal of a few microvolts or even weaker, which is simply impossible in the single-chip microcomputer.

The microcontroller is programmatic and can be modified. Different functions are achieved through different programs, especially special and unique functions, which require a lot of effort from other devices, and some are difficult to do with great effort. If a not very complicated function is done with pure hardware such as the 74 series developed in the 50s in the United States, or the CD4000 series in the 60s, the circuit must be a large PCB board!

But if you use a series of microcontrollers that were successfully put on the market in the United States in the 70s, the result will be very different! Just because the program you write can achieve high intelligence, high efficiency, and high reliability! Because the microcontroller is cost sensitive, so the current dominant software is still the lowest level assembly language (in recent years, the C language has also begun to be widely used), it is the lowest level language above the binary machine code, since it is so low-level, why use it?

There are a lot of high-level languages that have reached the level of visual programming, so why not use them? The reason is very simple, that is, the microcontroller does not have a CPU like a home computer, nor does it have a mass storage device like a hard disk. Even if there is only one button in a small program written in a visual high-level language, it will reach the size of tens of k!

It's nothing for a home PC hard drive, but it's not acceptable for a microcontroller. The utilization rate of single-chip microcomputer in terms of hardware resources must be very high, so although the assembly is respectful of Li Ran's original, it is still used in large quantities. In the same way, if the operating system and application software on the giant computer are run on the home PC, the home PC will not be able to bear it.

At present, the most commonly used monolithic bright disturbance delay machine is MCS-51, which is produced by Intel company (Intel that produces CPU) in the United States, 89C51 is a very popular single-chip microcomputer in China in recent years, it is developed and produced by Atmel company in the United States, and its core is compatible with MCS-51 single-chip microcomputer. Help your daughter-in-law write Li Xian's homework?