At present, the world is moving towards the trend of the Internet of Things and artificial intelligence. With the development and advancement of the physical network and artificial intelligence technology, the microprocessor technology is also constantly innovating, and the application of various new types of microprocessors is also deepening. . For the emergence of a large number of 32-bit embedded applications at this stage, ARM embedded technology is widely used in many embedded system designs. It is precisely because ARM's processors have many advantages that they can be so widely used.
Small size, low power consumption, low cost, high performance
Because of its small size and little space, the ARM processor can perfectly complete the application in the embedded environment. For embedded applications, ARM also maintains superior performance and is in a leading position in the world. Not only that, but also strives to achieve the lowest Power consumption. Previously, ARM also released a new processor called "Cortex-M0". The biggest feature is that it claims to be the smallest in the world and consumes the lowest power in the world. The advantage of the ARM structure is that it can take into account several aspects such as performance, power consumption, code density, and price, and it is relatively balanced.
The instruction execution speed is faster, and the instruction length is fixed
The ARM processor has 37 registers in total, divided into several banks (BANK). These registers include: 31 general-purpose registers, including the program counter (PC pointer), all of which are 32-bit registers. The 6 status registers are used to identify the working status of the CPU and the running status of the program, all of which are 32 bits, and only a part of them are currently used.
Compared with ARM code, it can save more than 30% to 40% of storage space, and it has all the advantages of 32-bit code.
Good compatibility with 8-bit/16-bit devices
The ARM microprocessor supports two instruction sets in the newer architecture: ARM instruction set and Thumb instruction set. Among them, ARM instructions are 32 bits in length, and Thumb instructions are 16 bits in length. The Thumb instruction set is a functional subset of the ARM instruction set, but is equivalent to
Rich selection of chips
ARM is not a chip manufacturer, it is licensed to semiconductor manufacturers. At present, almost all semiconductor manufacturers in the world have purchased a variety of ARM cores from ARM, equipped with a variety of different controllers (such as LCD controllers, SDRAM controllers, DMA controllers, etc.), peripherals, and interfaces. A chip based on the ARM core. Currently, there are hundreds of processor models based on ARM cores. In the domestic market, chips from ST, TI, NXP, Atmel, Samsung, OKI, Sharp, Hynix, Crystal and other manufacturers are common. Users can choose the most suitable chip from many specific models to design their own application system according to their respective application requirements, from the aspects of performance and function. Because the ARM core uses an upwardly compatible instruction system, the software developed by the user can be easily transplanted to a higher arm platform.
After a long period of development of ARM, ARM processors are even better than Intel’s ATOM processors in netbooks and tablet computers that require higher computing speeds. Apple’s ipads are also a deeply customized version of ARM. This type of processor architecture, ARM's processor architecture is also used in Android tablet products and many smart phones. With the advent of the Internet of Things, the processor under the ARM embodiment will play a more brilliant role.
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