2.18051 MCU
8051 MCU was first launched by Intel Corporation, and then Intel Corporation will use 80C51 kernel to patent swap or transfer to many famous IC manufacturers in the world. Such as Philips, NEC, Atmel, AMD, Dallas, siemens, Fujutsu, OKI, Huabang, LG and so on. On the basis of compatibility between Bute and 80C51 microcontroller, these companies have incorporated their own advantages and expanded peripheral circuits to meet the requirements of different measurement and control objects. For example, to meet the analog input A\/D, to meet the servo drive PWM, to meet the high-speed input\/output control of HSL\/HSO, to meet the serial expansion bus I2C, to ensure the reliable operation of the program WDT, the introduction of convenient and inexpensive Flash ROM, etc., to develop hundreds of new varieties with different functions. In this way, 80C51 MCU has become a large family supported by many chip manufacturers, collectively known as 80C51 series MCU. Objective facts show that 80C51 has become the mainstream of 8-bit MCU and has become the de facto standard MCU chip.
2.2AVR microcontroller
AVR microcontroller is a reduced instruction set RISC microcontroller introduced by ATMEL in the 1990s, similar to PIC. Use the Harvard structure. The Flash memory on the chip is attached to the user's product, which can be programmed and reprogrammed at any time, so that the user's product design is easy and the replacement is convenient. The AVR single chip microcomputer uses an enhanced RISC architecture, which gives it high-speed processing power, and can execute complex instructions in one clock cycle, achieving a processing power of 1MIPS per MHz. The operating voltage of AVR microcontroller is 2.7~6.0V, which can realize the optimization of power consumption. AVR microcontroller is widely used in computer external equipment, industrial real-time control, instrumentation, communication equipment, household appliances, aerospace equipment and other fields. The AT91M series is a new member of the ATMEL 16\/32 microprocessor family based on the ARM7TDMI embedded processor. The processor uses a high density 16-bit instruction set to achieve an efficient 32-bit RISC architecture with low power consumption.
2.3PIC microcontroller
MicroChip's main products are the PIC 16C series and 17C series 8-bit microcontrollers. CPU adopts RISC structure, respectively, only 33,35,58 instructions, using Harvard double bus structure, running speed, low operating voltage, low power consumption, large input and output direct drive capability, low price, one-time programming, small size. Suitable for large dosage, low grade, price sensitive products. In the office automation equipment, consumer electronics, telecommunications, intelligent instrumentation, automotive electronics, financial electronics, industrial control of different fields have a wide range of applications, PIC series single-chip microcomputer in the world single-chip microcomputer market share ranking increased year by year. It's developing very quickly.
2.4 MSP430 microcontroller of TI Company
Von Neumann architecture combines a 16-bit RISC CPU, a variety of peripherals, and a highly flexible clock system through the Universal Memory Address bus (MAB) and Memory Data Bus (MDB). The MSP430 provides an excellent solution for current and future mixed-signal applications. All MSP430 peripherals require minimal software services. For example, analog-to-digital converters all have automatic input channel scanning functions and hardware-initiated conversion triggers, and some also have DMA data transfer mechanisms. These superior hardware features allow us to concentrate CPU resources to achieve the features required by the target application without having to spend a lot of time on basic data processing. This means lower cost systems with less software and lower power consumption. Main application: measuring equipment, portable instrument, intelligent sensing system.
2.5 SCM based on ARM technology
ARM(Advanced RISC Machines) is a well-known company in the microprocessor industry, designing a large number of high-performance, inexpensive, low-power RISC processors, related technologies and software. The technology has the characteristics of high performance, low cost and low energy consumption. Suitable for a variety of fields, such as embedded control, consumer\/educational multimedia, DSP and mobile applications. ARM licenses its technology to many of the world's leading semiconductor, software and OEM manufacturers, each receiving a unique set of ARM-related technologies and services. Leveraging this partnership, ARM quickly became the creator of many global RISC standards. Currently, a total of 30 semiconductor companies have signed hardware technology licensing agreements with ARM, including major companies such as Intel, IBM, LG Semiconductor, NEC, SONY, Samsung, Philips and Kookmin Semiconductor. Typical products such as: CPU core ARM7, ARM9 and so on.