MCU

What is an MCU? The full name of the MCU, the Chinese name of the MCU, and the Chinese name of the MCU (Micro Controller Unit) as a multi-point control unit, also referred to as a single chip microcomputer, refer to the appearance and development of a large-scale integrated circuit. , The computer's CPU, RAM, ROM, timing, and a variety of I / O interfaces integrated on a chip, the formation of chip-level computers for different combinations of different applications to control.

MCU classification MCU can be divided into MASK (mask) ROM, OTP (one-time programmable) ROM, FLASHROM, etc. according to its memory type. MASKROM MCU is cheap, but the program has been solidified at the factory, suitable for applications where the program is fixed; FALSHROM MCU program can be erased repeatedly, very flexible, but the price is higher, suitable for price-insensitive applications Or for development purposes; OTPROM MCU price is between the first two, but also has a one-time programmability, suitable for applications that require a certain degree of flexibility, but also requires low-cost, in particular, the continuous renovation of the function, the need for rapid volume Production of electronic products.

After years of continuous research and development, the microcontroller has gone through four, eight, to the present 16-bit and 32-bit, or even 64-bit. The maturity of the products, as well as the number of input companies and the wide range of applications, are unprecedented. At present, large companies in foreign countries have developed their products early because of their early development and wide product lines. Therefore, local manufacturers are winning products with multi-functional products. However, it cannot be said that the price war of local manufacturers is a key factor that threatens foreign investors.

Due to the improvement of the process, the price spread between 8-bit MCU and 4-bit MCU is relatively small, and 8-bit has gradually become mainstream in the market; currently, most 4-bit MCUs are used in calculators, car meters, vehicle anti-theft devices, pagers, and wireless phones. , CD players, LCD drive controllers, LCD game consoles, children's toys, scales, chargers, tire pressure gauges, hygrometers, remote controls, and point-and-shoot cameras; 8-bit MCUs are mostly used in meter and motor controllers , electric toy machines, inverter air conditioners, pagers, fax machines, CallerIDs, telephone recorders, CRT monitors, keyboards, USB, etc.; most of the 16-bit MCUs are used in mobile phones, digital cameras and camcorders Players, etc.; 32-bit MCUs are mostly used in modems, GPS, PDAs, HPC, STB, Hub, Bridge, Router, workstations, ISDN phones, laser printers and color fax machines; most of 64-bit MCUs are used in high Class workstations, multimedia interactive systems, advanced video games (such as SEGA's Dreamcast and Nintendo's GameBoy) and advanced terminals.



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