(1) There are more and more applications of battery power supply, and due to the limitation of product size, many of them are powered by button cell, which requires the power consumption of the system to be as low as possible, such as hand-held meters, water meters and toys.
(2) With the complexity of the application, the requirements for the function and performance of the processor are increasing. Need to have a wealth of peripherals, flexible functions, and a certain amount of computing power, to be able to do some real-time algorithms, not just some simple control.
(3) The product update speed is fast and the development time is short. I hope that the development tools are simple, cheap and fully functional. In particular, the simulation tools should be continuous, adapt to a variety of MCU, avoid repeated investment and increase development costs.
(4) The product has stable performance and high reliability, which can not only be encrypted and protected, but also be convenient to upgrade.
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Development characteristics of 1 single chip microcomputer technology
Since the appearance of single-chip microcomputer, single-chip microcomputer technology has experienced nearly 20 years of development. In the past 20 years, single-chip microcomputer has been developed.
It can be seen that the development of MCU technology is based on MPU technology and VLSI technology.
Exhibition is the forerunner, and under the pull of a wide range of applications, it presents a more personalized development trend than microprocessor.
Long life of single-chip microcomputer The long life mentioned here means that the products developed by single-chip microcomputer can work stably and reliably.
On the other hand, ten or twenty years means a long life compared with microprocessors. With the rapid development of semiconductor technology,
The update speed of MPU is faster and faster, and the MPU represented by 386, 486 and 586 is eliminated in a short time.
Bureau, and the traditional single-chip microcomputer such as 68HC05,8051already 15 years old, the output is still rising. This aspect is made by
On the other hand, its adaptability to the corresponding application fields is due to the integration of more I/O functions with this CPU as the core.
New single-chip microcomputer series modules emerge one after another. It is foreseeable that some relatively young CPU cores that have been successfully listed will follow.
With the continuous enrichment of I/O functional modules, its life cycle is very long. With the addition of new CPU types, the single chip microcomputer team
The continuous growth has brought more choices to users.
The simultaneous development of 8-bit, 16-bit and 32-bit single-chip computers is another trend of single-chip computer technology development. Long time, single.
The development of single chip microcomputer technology is mainly based on 8-bit computer. It has high-tech products such as mobile communication, network technology and multimedia technology.
Entering the family, the application of 32-bit single chip microcomputer has developed greatly. 1997 32-bit single chip microcomputer with Motorola 68K as CPU.
Sales reached 80 million pieces. It used to be thought that it was because the function of 8-bit single chip microcomputer was getting stronger and stronger, and 32-bit computers were getting cheaper and cheaper, making 16 bits.
The living space of single-chip microcomputer is limited, and the development of 16-bit single-chip microcomputer in recent years has greatly improved both variety and output.
Degree of growth.
The speed of single chip microcomputer is getting faster and faster, and the development speed of MPU is shown by the higher and higher clock frequency.
Yes Single-chip microcomputer is different, in order to improve the anti-interference ability of single-chip microcomputer and reduce noise and clock frequency without sacrifice.
Operation speed is the pursuit of the development of single chip microcomputer technology. Some 805 1 single chip compatible manufacturers have improved the internal time of single chip microcomputer.
Sequence, in the case of not increasing the clock frequency, the operation speed has improved a lot, and Motorola single chip microcomputer uses locks.
Phase-locked loop technology or internal frequency doubling technology makes the speed of internal bus much higher than the frequency of clock generator. Manufacture of 68HC08 Single Chip Microcomputer
Using 4.9M external oscillator, the internal clock reaches 32M, while M68K series 32-bit single-chip microcomputer uses 32K external oscillator frequency.
The internal clock can reach above 16MHz.
Low voltage and low power consumption Since the mid-1980s, the single chip microcomputer based on NMOS technology has been gradually replaced by CMOS technology, and the power consumption has been reduced.
With the development of VLSI technology from 3μm to 1.5, 1.2, 0.8, 0.5, 0.35, it has been greatly reduced.
Recently, the realization of 0.2μm technology and the all-static design make the clock frequency from DC to tens of megabytes optional, which makes the power consumption decrease continuously.
. Motorola recently introduced the optional M.CORE, which can work at 50M/48 IPS at full speed at 1.8V with a power of about.
20mW. Almost all single-chip computers have power-saving operation modes such as waiting and stopping. The allowable supply voltage range also
Wider and wider. Generally, the single chip microcomputer can work in the range of 3 to 6V, and the single chip microcomputer that supplies power to the battery no longer needs to collect electric energy.
Take measures to stabilize the voltage. The lower power supply limit of low-voltage single-chip microcomputer is reduced from 2.7V to 2.2V and1.8V. Single-chip microcomputer uses 0.9V power supply.
The machine has come out.
Low noise and high reliability technology can improve the anti-electromagnetic interference ability of single chip microcomputer system and make the product adapt to harsh working environment.
As an environment, in order to meet the requirements of higher standards of electromagnetic compatibility, SCM vendors use it in the internal circuit of SCM.
Some new technical measures are introduced. For example, an anti-EMI circuit has been added to the COP8 single chip microcomputer of the US National Semiconductor NS, which has enhanced the.
The performance of watchdog. Motorola also introduced LN series low-noise single-chip microcomputer.
OTP and masked OTP are write-once microcontrollers. In the past, people thought that the maturity of a single chip microcomputer product was based on the production of mask.
Type a single chip microcomputer as a symbol. Because masks need a certain production cycle, and the price of OTP single chip microcomputer keeps falling, which makes
In recent years, it is more popular to directly use OTP to complete the final product manufacturing. Compared with masks, it has the advantages of shorter production cycle and less risk.
Features. In recent years, the demand for OTP single chip microcomputer has greatly increased. In order to meet this demand, many single chips adopt on-chip technology.
In system programming. The unprogrammed OTP chip can adopt die bonding technology or surface mount.
Technology, first welded on the printed board, and then from single chip microcomputer to single chip microcomputer through programming lines, serial data, clock lines, etc.
Machine programming. It solves the problem of poor contact between the chip and the writer when writing OTP chips in batches. Let OTP be naked
Tablet computers can be widely used to reduce product costs. I/O line * * * is used for programming line, and no additional pins of single chip microcomputer are added.
However, some single-chip computers introduced by manufacturers no longer have mask type, and all of them are OTP with ISP function.
MTP challenges the prosecutor's office. MTP means that it can be programmed many times. Some single-chip microcomputer manufacturers introduced it with the performance of MTP and the price of OTP.
Their single-chip computers, such as ATMEL AVR, use FLASH on the chip and can be programmed many times. By Winbond and
805 1 compatible single chip microcomputer also adopts MTP performance and OTP price. These single-chip computers all adopt ISP technology, such as installation.
Download the program after going to the printed circuit board.
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805 1 single chip microcomputer 805 1/3 1 was first introduced by Intel, and it is also the most widely used single chip microcomputer in the world.
One of the movie machines. Because Intel focuses on PC-compatible devices such as 186, 386 and Pentium in embedded applications.
In the development of high-end chips, 805 1 single chip microcomputer is mainly produced by Philips, Samsung, Winbond and other companies. These companies are all
On the basis of maintaining compatibility with 805 1 single chip microcomputer, many characteristics (such as timing characteristics) of 805 1 are improved. Increase speed, decrease
The clock frequency is reduced, the dynamic range of power supply voltage is relaxed, and the product price is reduced.
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