What is SoC? how it is different from CPU? Why is it considered a better development?

Question :

What is SoC? how it is different from CPU? Why is it considered a better development?

A system on a chip (SoC) combines the required electronic circuits of various computer components onto a single, integrated chip (IC). SoC is a complete electronic substrate system that may contain analog, digital, mixed-signal or radio frequency functions. Its components usually include a graphical processing unit (GPU), a central processing unit (CPU) that may be multi-core, and system memory (RAM). 

Because SOC includes both the hardware and software, it uses less power, has better performance, requires less space and is more reliable than multi-chip systems. Most system-on chips today come inside mobile devices like smartphones and tablets. These are considered a better development because of their small size and speed capability. 


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