General/special. General purpose single chip microcomputer: not designed for a specific purpose, such as 80C51. Dedicated single chip microcomputer: designed and produced for a certain class of products or even a certain product, such as VCD, DVD and PC sound card, video card CPU chip.
Generally speaking, there are three kinds of application classification of single-chip microcomputer, that is, universal type, control type, bus. The basic structure of the single chip microcomputer is very simple, there are three parts, that is, the operator, the main register, the controller. Single-chip microcomputer as an important branch of the development of computer, according to the current development situation, from different angles single-chip microcomputer can be roughly divided into generalUse type/special type, bus non-bus type and industrial control type/home appliance type. General/Special This is differentiated according to the scope of application of the single chip microcomputer.
MCU has a wide range of applications in daily life, and its functions cover many different fields. The following are some common applications of microcontrollers in daily life: Home appliances and home automation: Microcontrollers are embedded in many home appliances, such as washing machines, refrigerators, microwave ovens, air conditioners, etc., for controlling and monitoring the operating status of equipment.
Type: There are many kinds of microcontroller, generally classified according to the number of microcontroller data bus bits, mainly divided into 4 bits,The special function registers of the MCU are allocated to the high 128-byte unit of internal RAM, and there are 22 special function registers, of which 21 can be accessed. The remaining units except the units occupied by the register can not be used by the user anymore, but are retained by the system for later expansion design. From a physical point of view, the MCS/51 microcontroller has four storage Spaces, but from the user and logic point of view, the microcontroller actually has only three storage Spaces. This article will delve into the storage space of MCS-51 microcontroller, helpReaders better understand this single chip computer.
5, in the world of single chip microcomputer, MCS/51 series with its excellent performance, mature technology, high reliability and cost-effective, sit firmly in the leading position of industrial measurement and control and automation engineering applications. This paper introduces the P0 port expansion method of MCS/51 microcontroller and the parallel expansion method using 74HC244 chip and 74HC377 chip.
6, MCU is usually used in industrial production control, life and procedures and control related (such as: electronic organ, refrigerator, intelligent air conditioning, etc.) occasions, it is not used to doFor office automation. What are the members of the MCU family? MCS51 MCU, 8051, 8031, 89C51.
1, generally speaking, the price of power IC is about 80 yuan. The power supply IC is the pulse width control integration of the switching power supply, and the power supply depends on it to adjust the stability of the output voltage. The power supply is the device that provides power to the device, also known as the power supply, which provides the electrical energy needed by all the components in the computer.
2, generally replace an ic isAbout 100 to 200 yuan, the need for a chip level maintenance master to be able to do a good job, they are blowing up the broken chip through high temperature, and then high temperature welding on, is a manual technology, generally takes about 3 years of motherboard maintenance experience.
3, apple fork IC chip generally need three to five hundred yuan, I recently changed.
4, power management chip is only a general term, there are more than a dozen related chips on the motherboard. If you just say how much the chip is generally a few dollars to tens of dollars, but the maintenance is generally not charged according to the cost of the chip, the big head is howDo you find what's bad and need to be sick of those things.
5, if you want to change the Apple phone original touch IC chip can go to the following Apple phone repair shop replacement only need 280 yuan on it.
6, the main board is generally 2-3 thousand yuan. But in fact, there are many chips on the motherboard, which are responsible for power, display, sound, wifi network, 4G network and voice call. One or both chips are responsible for each function. Therefore, for which fault as long as you find the relevant management chip can be repaired.
Like ACTEL's chip, the chip decryption price bid to 600,000, and no one has accepted the order, because its cracking cost is far greater than 600,000. In the technical competition of encryption and decryption, the technology of both sides is constantly improving, and the two coexist.
On the one hand is the problem of price cost, on the other hand is the problem of time. However, I believe that there is a market demand, will eventually be cracked out. Just like ACTEL's chip, the chip decryption price bid to 600,000, and no oneTake the order, because its cracking cost is much greater than 600,000.
This kind of scammer is easy to spot. It's usually about shopping around. Ask the price of each company to find the lower decryption. If a quote is lower than all the others, and much lower, then he is 80% a liar. Don't get so cheap, or you'll be cheated.
The decryption cost is very high, and the decryption of the general CPLD will be about 10,000. (2) Try not to choose MCS51 series single-chip microcomputer, because the single-chip microcomputer has the highest popularity in China and has been the most thoroughly studied.