Effective application of single chip microcomputer

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Effective application of single chip microcomputer

(1) service life. Life mainly refers to the following two aspects: the single-chip development products have good stability and long service life, which can run stably for 10 years or more than 20 years; compared with the microprocessor, they have a longer service life. With the continuous improvement of semiconductor technology and MPU upgrading speed, some of them have been successfully listed. Meanwhile, the younger CPU core will continue to enrich with the development of I / O module, with a longer life cycle. With the emergence of new CPU products, the field of single-chip computer is expanding, and the choice of users is increasing. At present, the main development trend of single-chip microcomputer is the common progress of 32-bit, 16 bit and 8-bit single-chip microcomputer. At first, the single-chip microcomputer started from 8 bits. With the development of multimedia technology, Internet technology and mobile communication technology, 32-bit single-chip microcomputer gradually developed. For example, mororola68k, a 32-bit CPU microcontroller, once achieved 80 million pieces of sales, while the development of 16 bit microcontroller has made great progress in terms of output and variety, showing a trend of growth

(2) operation speed. In the development of MUP, the speed is constantly increasing, mainly marked by the clock frequency, which is gradually increasing. However, there are some differences between MCU and MUP. In order to further improve the anti-interference ability of MCU and reduce the impact of noise, MCU gradually starts to reduce the clock frequency in the development process, so it is not hesitate to reduce the operation efficiency. Starting from the internal system of single chip microcomputer, changing the internal time sequence, further improving the operation speed of single chip microcomputer without increasing the clock frequency

(3) high reliability and low noise technology. First of all, EFT technology belongs to anti-interference technology. When the sinusoidal signal in the oscillating circuit is affected by the external environment, the waveform it sends will be superimposed with various kinds of burr signals, and people often use Schmitt circuit for shaping in the process of processing, then the circuit oscillating burr will become the clock triggering signal interference, alternately using RC filter circuit and Schmitt circuit It can effectively eliminate the burr effect, make the influence fail, and promote the smooth transmission of the system clock signal. Further improve the stability of single chip microcomputer. The second is the drive technology and low noise wiring technology. The traditional single-chip microcomputer usually sets the ground wire and power supply in the symmetrical pin position of the circuit shell, mostly in the symmetrical position of the upper right, lower left, upper left and lower right, so that the power noise can pass through the whole chip smoothly and interfere with the internal circuit of the single-chip microcomputer. Most single-chip microcomputers set the power pin and the ground wire in two adjacent pins, which can effectively reduce the current passing through the whole chip, and set decoupling capacitance in the printed circuit board, further reducing the impact of noise

(4) mask and OTP. OTP is a single chip with one-time input. In the past, the single-chip computer that put mask into production was regarded as the sign of the maturity of the single-chip computer product. Because the mask has the corresponding production cycle, and the price of the single-chip computer of OTP model is also constantly decreasing, so the product manufacturing through OTP has gradually become the development trend in recent years. Compared with the mask method, it has the advantages of small risk and short production cycle. In the new era of social discovery, the demand for OTP single-chip computers is also rising.