Microcontrollers in mobile devices
What is a microcontroller?
Microcontrollers are small computers that we come across everywhere in our everyday lives, the smartphone is just one example of many. They are installed in televisions, traffic lights, alarm systems and all other technical devices and, once programmed, can send signals, but also receive them. Simple cell phones that do little more than voice and text calls usually consist of a processing unit that does everything - user interface (keyboard, display), RF processing, battery management, etc.
What is the difference between a microcontroller and a microprocessor?
The microprocessor is a simple central processing unit (CPU) on a single chip. It contains an arithmetic logic unit (ALU), a control unit (CU), registers, command decoders, a bus control circuit, etc.
A microcontroller is the connection between the microprocessor and peripheral devices that support the circuit and memory (both data and program). It is not necessary to be on a single chip.
The microprocessors in smartphones are SoC systems on the chip and closer to microcontrollers than to microprocessors because they try to put everything - from processing to device interface to memory, programming and data storage, etc. - on one chip to do.
Microcontrollers and microprocessors in mobile devices
Smartphones and other mobile devices have multiple microprocessors and microcontrollers. The main processor is a microprocessor with a bus to communicate with memory on separate chips (although often included in the same IC package) and buses to communicate with the rest of the equipment. They usually contain some of the controllers, such as For example, the display controller, so they have some of the characteristics of microcontrollers, but they are still more microprocessors than microcontrollers. The latest generation of smartphones often leans towards microprocessors for the RF chipset to provide flexibility to the manufacturer by using software design rather than hardware design for some functions. However, you have more of the hardware interface (RF etc) on the chip itself. The rest of the phone has multiple microcontrollers. These control the touch screen, audio, sensors, cameras, etc.
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System on a Chip (SoC) in smartphones?
Processors are at the heart of any PC-like device. Manufacturers also advertise smartphones with high clock frequencies and a large number of cores. SoC (System on a Chip) is a microprocessor that cannot be compared with commercially available PC processors. Smartphone processors combine the main processor core (also known simply as the processor (CPU)) graphics chip (GPU), memory chip and sound chip on a microprocessor. The reason is the lack of space that exists on the mobile devices.